Integrated Pest Management for Greenhouse Crops

8 0 0 -3 4 6 -9 1 4 0
INTEGRATED PEST MANAGEMENT
FOR GREENHOUSE CROPS
Appropria te Technology Tra ns fer for Rura l Area s
PEST MANAGEMENT SYSTEMS GUIDE

ATTRA is the national sustainable agriculture information center funded by the USDA’s Rural Business -- Cooperative Service.

By Lane Greer and Steve Diver
NCAT Agricultural Specialists

Abstract: This publication covers IPM for
greenhouse crops, both vegetable and ornamental.
Monitoring, sanitation, biological controls,
biorational pesticides, insect growth regulators, and
disease control methods are discussed. Tables
include information on the newest biorational
pesticides and biological control organisms.

General Greenhouse IPM

Insects and diseases are a major challenge to
greenhouse production. IPM is an important
tool in the management of these pests. The
primary goal of IPM is to optimize pest control
in an economically and ecologically sound way.
IPM involves the integration of cultural,
physical, biological, and chemical practices to
grow crops with minimal use of pesticides.
Monitoring, sampling, and record keeping are
used to determine when control options are
needed to keep pests below an economically A Guide to Insects and Related Pests of Floricultural
damaging threshold. Pest management, not Crops in New England: For Commercial Growers
eradication, is the goal of IPM. (1), a University of Massachusetts Cooperative
Extension System publication, outlines the basic
Index strategy on greenhouse IPM:

General Greenhouse IPM // 1 IPM is a simple, practical, and, most
Greenhouse Insect and Mite Control // 2 important, flexible way to manage insects,
Crop Scouting & Trapping // 2 mites, diseases, weeds and vertebrates.
Sanitation // 3
Biological Control // 3
Integrated pest management is adaptable to
Insect Growth Regulators // 5
Biorational Pesticides // 6 all greenhouse-grown crops and involves
Greenhouse Disease Control // 6 specific techniques to manage pests. These
References // 10 techniques are:
Resources // 12
Biological Control Suppliers // 15 • Monitoring or scouting program
Appendix I: Monitoring and Scouting Techniques // 19 - individual plant inspection
Appendix II: Beneficial Organisms // 22 - yellow, blue, and hot pink sticky cards
Appendix III: Biorational Pesticides // 29
- indicator plants

ATTRA // Integrated Pest Management for Greenhouse Crops Page 1

• Pest identification and life stages This publication deals with general greenhouse
• Record keeping to identify trends and IPM principles. ATTRA has more information
direction for your pest management on specific greenhouse pests. Request
program Greenhouse IPM: Sustainable Aphid Control,
• Exclusion techniques to prevent pests Greenhouse IPM: Sustainable Whitefly Control, or
from entering the production area Greenhouse IPM: Sustainable Thrips Control.
- Insect screens to exclude aphids, ATTRA also has specific information on the
whiteflies, and thrips from entering other greenhouse pests mentioned above.
through doors and ventilating
systems A selection of the better publications on
• Cultural practices to prevent problems greenhouse IPM is listed in the Resources
- soil testing section below. The publications from Applied
- sanitation Bio-Nomics, The Green Spot, and California
• Biological controls, living organisms Environmental Protection Agency are essential
used to reduce the incidence of pest references that every IPM grower should have
organisms on his or her bookshelf.
• Insect growth regulators, insecticides
that interfere with normal insect Crop Scouting and Trapping
development or the molting process
• Chemical controls To detect early infestations, a crop scouting
- proper choice of pesticides program that includes both sticky trap cards
- proper timing of pesticide application (usually yellow) and visual inspection is critical.
- proper application procedure Scouting should be done once a week, and more
often after an infestation is detected. Regular
It is important to understand the life cycle and scouting is also necessary to monitor the efficacy
behavior of insect pests in order to develop an of control measures. A hand lens is a useful tool
effective control strategy. Knowledge about the to detect live pests as well as signs of pest
weak link in a pest’s life cycle can help growers activity— e.g., frass (feces), cast skins,
choose the most appropriate control strategy. honeydew, etc.

There are several practices that will increase the Monitoring records can be kept on paper or in a
success of an IPM program (2): computer. (Computers are usually better for
producing graphs, which show trends more
easily.) State and federal regulations will soon
• Cover all soil floor surfaces with concrete,
require that all greenhouses that apply
black plastic or weed barrier.
pesticides keep records on what was applied. If
• Use resistant varieties of plants.
plant injury symptoms appear, the grower can
• Keep people and “pet plants” out of crop
see quickly what chemicals or biocontrols have
areas as much as possible.
been used, and how the environment affected
• Pasteurize growing medium.
the crop (3). And, thorough records are
• Keep doors closed. invaluable in negotiations with suppliers for
compensation for problems traced to receipt of
Greenhouse Insect and Mite Control diseased stock (3).
Major insect and mite pests of greenhouse crops At a minimum, records should include:
include aphids, thrips, whiteflies, fungus gnats,
• Minimum and maximum temperatures for
mealybugs, shore flies, spider mites, leafminers
each day
and scales. In addition to damaging the crop,
• Counts from sticky cards, changed weekly
some insects vector diseases like tomato spotted
• Counts of pests on the plants, including
wilt virus.
stage of growth (egg, immature, adult)

• Plant growth and development based on infested plants, or any infested growth. Ideally,
measurements of selected, flagged plants the greenhouse should be thoroughly cleaned
• Root health based on weekly check of and left empty for one week prior to beginning
random plants the next crop. This enables removal of all pest
• Growing medium pH and soluble salts of stages, and starves any remaining adults.
random plants Closing up the greenhouse when it is empty in
• Specific crop observation (height, leaf color, summer will increase the temperature and help
bud development, etc.) eradicate pests.

See Appendix I: Monitoring and Scouting Inside the greenhouse, a clean stock program
Techniques for Greenhouse Plants for more should be in place. This includes temporary
specific information. quarantine and inspection of all plants upon
arrival from other greenhouses, and regular
Sticky Ribbons monitoring of stock plants used for propagation.
If a separate section of the greenhouse can’t be
Sticky ribbons are long sticky insect strips that dedicated to this purpose, flag all incoming
are hung throughout the greenhouse as a means plants. All new plant material should be
of reducing insect populations of whiteflies, thoroughly inspected (with a 10X hand lens) for
leafminers, aphids, fungus gnats, and thrips. the presence of pests to ensure that no infested
Unlike sticky traps that are used for monitoring, plants are introduced into the greenhouse.
the primary purpose of sticky ribbons is to Workers in the greenhouse should avoid
reduce the numbers of flying insect pests by wearing yellow clothing, since many pests are
simply catching them. attracted to this color and may hitch a ride on
the fabric from one greenhouse to the next.
Sanitation
Screening
Sanitation is key for controlling pests in
greenhouses. The goal of sanitation is to Insect screens physically exclude the entry of
eliminate all possible sources of the pest. Weeds lightweight, airborne insects like aphids,
inside and near the outside of the greenhouse whiteflies, and thrips from the greenhouse
can harbor pests. It's best to pull the weeds through doors, cooling pads, and ventilation
inside the greenhouse rather than spray them, units. Although the tiny pores of insect screens
since insects may survive the spray and migrate prevent entry of insects, they can also impede
onto crops. Bag all weeds and dispose of them the flow of air. Some specialists say the area the
outside the greenhouse. screen covers should be three times that of the
area covered (doors, ventilation) to facilitate
sufficient air intake. To accomplish this, screen
In addition, a 10–30 foot vegetation-free zone
houses designed to enclose both the cooling
around the outside perimeter of the
pads and greenhouse entranceway can be
greenhouse—especially near vents and
installed.
opening—can provide a dramatic decrease in
pests. A heavy-duty geotextile weed barrier (e.g.,
DeWitt Sunbelt® Weed Barrier) covered with Biological Control
bark mulch or gravel can provide a pleasant
vegetation-free zone, and eliminate the need for Biological control is the use of living organisms
herbicides. to control crop pests. Biological control of
greenhouse insect pests can be achieved
Plant debris from previous crops can also be a through release of biocontrol agents like
source of both immature and adult pests. Clean predatory mites, pirate bugs, soil-dwelling
up all debris from previous crops and dispose of mites, and parasitic insects.


Implementing a biological control program in a Suppliers of biocontrol agents can provide
greenhouse is management intensive and technical assistance and help growers get
requires more knowledge on the part of the started in a biocontrol program. When
grower than do traditional pest control requesting assistance or ordering beneficials
programs. Proper species identification is very from a supplier, the grower should be able to
important before a control program using provide information such as: what the pest is,
predators or parasites is initiated. Release rate, how much square footage is affected, crop
timing, placement, temperature, and pesticide rotations, fertility programs, and pesticides that
use also influence the success or failure of have been used in the greenhouse.
biological control efforts. Rigorous monitoring
is necessary for proper timing of biocontrol The Canadian greenhouse vegetable industry—
agent releases, as is a reliable supply of the which is about four times the size of the U.S.
natural enemies. industry—is largely based on biological
controls. In 1995, tomato growers in British
Knowing the lifespan of the beneficials selected Columbia spent 50 cents per square meter per
is important too, since fewer releases are season on biological control, primarily on the
required if sufficient numbers of parasites or parasitic wasp Encarsia formosa (5).
predators are maintained. Some species of
beneficials live only a few days and therefore There are several items to keep in mind when
must be released biweekly. Other species live using biological controls (6):
for several weeks; consequently, they are • No single pest control method is 100%
released less frequently. effective.
• This method often involves more work at
The level of control provided by a natural first than chemical control, and it may
enemy will also vary with crop species. It is require changes in production methods.
therefore more difficult for bedding and other
• Biologicals are often highly susceptible to
container-plant growers to implement
pesticides. When choosing pesticides, select
biocontrol, since they produce a wide variety of
those with the shortest residual life and the
crops.
highest specificity.
• Since many biologicals work slowly, they
One of the most important things to keep in are best used when pest numbers are fairly
mind when using biologicals is that even low.
residual insecticide can harm them. This
• Most predators and parasites perform best at
happened to a grower who tried to use Encarsia
moderate temperatures (65–85°F) and
formosa, a parasitic wasp, on his poinsettias (4).
humidities (60–90%).
The previous crop had been sprayed with a
• If the greenhouse is allowed a dormant
pesticide two months before applying the
period (either very hot or very cold), the
wasps, but all the wasps were killed by the
beneficials will die.
residual.
• If the pest level is very high when
beneficials are first introduced, they
Biologicals also allow more thorough coverage
probably will not provide enough control.
than spraying and a more efficient use of labor,
• The effectiveness of the same beneficial may
since workers don’t have to wait for re-entry
be different on different plants. For
into the greenhouse (4).
instance, beneficials are often less effective
on hairy-leaved plants like tomatoes.
Generally, the best time to release beneficials is
• If all the plants leave the greenhouse, so will
at the first sign of a pest infestation. Early
the beneficials.
morning and dusk are the optimum release
times.


• If all the pests are destroyed, the beneficials developing resistance. IGRs can work in one of
will starve. several ways: 1) they can mimic juvenile
• Some plants exude substances toxic to hormones, so that insects never enter the
beneficials. reproductive stage of development; 2) they can
interfere with the production of chitin, which
See Appendix II: Beneficial Organisms for makes up the shell of most insects; or 3) they
more information on biological control agents. can interfere with the molting process.

Insect Growth Regulators IGRs usually work through ingestion, so good
spray coverage is essential. They generally
Insect growth regulators (IGRs) are another don’t affect non-target species—such as
least-toxic pesticide control option for pests. humans, birds, fish or other vertebrates. For
IGRs typically kill insects by disrupting their most IGRs there are minimal re-entry
development. They have a complex mode of restrictions. IGRs typically take several days to
action that precludes insects from rapidly have an effect on pest populations. Because

Table 1. Selected Insect Growth Regulators

Brand Name Supplier Active against
Adept Uniroyal Chemicals fungus gnats
Azatin Hydro-Gardens, Olympic whiteflies, leafminers, thrips, mealybugs,
Horticultural Products fungus gnats, aphids, cabbage loopers,
diamondback moths, armyworms
Citation Novartis leafminers, fungus gnats, shore flies
Confirm Rohm & Haas caterpillars
Dimilin Uniroyal Chemicals beet armyworm, whiteflies, fungus gnats,
shore flies
Distance Valent whiteflies, fungus gnats, shore flies
Enstar II Wellmark Intl. whiteflies, fungus gnats, aphids, soft and
armored scales, mealybugs
Insegar Novartis caterpillars, psyllids, scales
Neemazad Thermo Trilogy whiteflies, leafminers, thrips, mealybugs,
fungus gnats, aphids, cabbage loopers,
diamondback moths, armyworms
Neemix Thermo Trilogy whiteflies, leafminers, thrips, mealybugs,
fungus gnats, aphids, loopers,
diamondback moths, armyworms,
cabbage loopers
Precision Novartis whiteflies, soft scales, fungus gnats, shore
flies, leafminers
Preclude Whitmore Micro-Gen whiteflies, thrips, scales, aphids
Pyrigro Whitmore Micro-Gen whiteflies, fungus gnats, scale
Trigard Novartis leafminers


IGRs do not affect mature insects, adult Spinosad
beneficials released into the greenhouse after an
IGR application are not likely to be affected. Early in 1999, Conserve SC™ from Dow
Use of IGRs is generally prohibited by organic AgroSciences was registered for use on
certification organizations because the products greenhouse ornamentals. The active ingredient
are synthetic. comes from the soil-inhabiting actinomycete
Saccharopolyspora spinosa. Conserve is effective
IGRs can sometimes be used in conjunction with against many different species of caterpillars,
biological control efforts and may provide leafminers, and thrips. Experiments performed
growers with a “safety net” should beneficials at the Ohio State University showed that
fail to keep the pests below economically Conserve provided excellent control of Western
damaging levels. Table 1 lists some well-known flower thrips (7).
insect growth regulators. (See the Resources
section for suppliers.) Hot Pepper Wax and Garlic Extract

Biorational Pesticides These products are actually insect repellents. Hot
Pepper Wax™ contains paraffin (refined wax)
The integration of biorational pesticides (also and capsaicin (the “hot” in hot peppers).
known as least-toxic or biopesticides) in Another study at Ohio State showed that Hot
greenhouses is often necessary in addition to Pepper Wax did not control Western flower
cultural and biological control measures. When thrips, but was effective against two-spotted
the use of a pesticide is necessary, materials spider mite (7). Products containing garlic also
should be selected that are least harmful to the work to repel insects.
predators and parasites released into the
greenhouse. Insecticidal soap, horticultural oils, See Appendix III: Biorational Pesticides for
and the bacterium Bacillus thuringiensis are information on products formulated for specific
examples of insecticides that can be safely pests.
integrated into a biological control program.
The advantages of biopesticides over Greenhouse Disease Control
conventional chemicals are their selectivity to a
targeted pest, lower toxicity to beneficial insects The greenhouse climate is ideal for the
and greenhouse workers, and shorter re-entry development of plant diseases. An integration
intervals (REI). of cultural practices, environmental control,
biological control, and natural control products
Enhanced control with pesticides is achieved will be needed to prevent widespread outbreak.
with thorough spray coverage. Wider plant
spacing and removal of dead lower leaves Many fungicides are also toxic to beneficial
improves pesticide coverage and pest control. organisms, and should be avoided if possible.
Alternative disease control techniques include
Beauveria bassiana the use of disease resistant varieties, disease-free
seeds and plants, well-drained soil, air
BotaniGard™ (from Mycotech) and Naturalis- circulation, weed eradication, humidity control,
O™ (from SePro) are the two commercial sanitation, disease-suppressive composts,
formulations of B. bassiana that are available for compost watery extracts, and microbial
greenhouse use. B. bassiana is a naturally antagonists.
occurring fungus that attacks a wide range of
pests—including aphids, whiteflies, thrips and Disease control may be classified into two
spider mites. B. bassiana has been found to be approaches: 1) those aimed at the root
compatible with predators such as Encarsia spp., environment, and 2) those aimed at the aerial
Eretmocerus spp. and Chrysoperla spp. environment.


The Root Environment highly effective and environmentally safe.
Equipment and fuel costs are expensive,
Soil disinfection (i.e., sterilization) is an however, and treatment between crops is labor
important part of soil-borne disease control and time consuming. These are the chief
when raising vegetables by the ground culture reasons many growers shifted to soilless mixes.
method or when soil-based potting mixes are
used. Soil-borne diseases include damping-off There are three methods of steaming in common
(Pythium and Rhizoctonia), black root rot use today (8):
(Thielaviopsis), and several other root rots and
wilts caused by Fusarium and Phytophthera. 1) Tarping an area and piping in steam for
Potting mixes based on compost, peat moss, 6–8 hours, heating and sterilizing the top
vermiculite, perlite, and bark are typically 8 inches of soil;
pathogen-free and do not require prior 2) Pumping steam into subsurface drainage
sterilization. pipes, sterilizing the top 2 feet of soil;
and,
Sterilization involves heating the soil to 212°F 3) Negative pressure steaming, where
for 30 minutes, a process that kills most pumps pull steam applied at the surface
organisms in the soil. Chemical changes also through pipes buried 2 feet deep and 10
occur in the soil and may affect plant nutrient feet apart.
uptake to the following crop. Pasteurization
involves heating the soil to only 160°F for 30 Solarization
minutes. While most harmful pathogens are
killed at this temperature, many beneficial soil
Soil solarization is the process of tarping moist
organisms survive. Thus, pasteurization is the
soils with clear polyethylene to trap solar
preferred method in organic programs.
radiation and raise soil temperatures to levels
lethal to most pathogens and weed seeds.
Chemical biocides, electrical heat, steam heat,
Solarization is most effective when applied for
and soil solarization are the primary methods of
at least 30 days in midsummer. Two layers of
soil disinfection in greenhouse production. A
polyethylene, separated by fillers (i.e., pvc pipes
fifth method of disease suppression is biological
or 2'x 4's) spaced every few feet to create an air
control. Soil fumigants such as methyl bromide
space, increases the efficiency of solarization.
are, of course, restricted in organic production.

Electrical heat treatment, which is done inside a Solarization in greenhouses is a proven means
steel chamber surrounded by heating coils, is of soil sterilization, and is practiced worldwide
limited to treating about a cubic yard of soil at a in Japan, Israel, Greece, France, Italy, Belgium,
time. Its primary use is in the pasteurization of Portugal, and Spain (9–11), in addition to the
small batches of sand and soil for potting mixes. United States and Canada.

Accordingly, steam pasteurization and soil Solarization can also be used to pasteurize sand
solarization are the two most viable options for or soil intended for potting media, or to treat
sterilizing greenhouse soils or large volumes of used media (12). A simple technique developed
soil-based mixes. Biological control is in Florida (13) is to fill a black plastic trash bag
complementary to these two methods. with media, which is then sealed in a
transparent plastic bag. The double-wrapped
Steaming media is placed in the open on asphalt or
concrete and spread to a uniform depth of 3
Steam was the primary method of soil inches.
sterilization in the greenhouse industry prior to
the emergence of soil fumigants. Steam heat is


As long as the trashbag received one full day of The beneficial effect of crop rotation on plant
sunshine from April through August, the health and yield is probably due to changes in
temperatures reached or exceeded 113°F for soil microflora. These shifts result in increasing
more than 2 hours. This temperature, which numbers of beneficial microorganisms
was monitored with a thermometer inserted (including nitrifying and other useful bacteria,
into the media, was considered the minimum antagonists of pathogens, etc.), and in
treatment period for plant-parasitic nematodes. decreasing numbers of noxious ones (pathogens
This method yields about 24 liters of media. and antagonists of beneficial microorganisms)
(15).
Biological control of pathogens in greenhouse
soils and potting mixes is accomplished through In some greenhouses, a short-term break crop—
natural control via cultural practices, and such as annual ryegrass, oats, buckwheat, or
secondly, through applied biocontrols. The rapeseed—may fit into the rotation and be used
introduction of biocontrol agents, or to increase organic matter. Another option is to
antagonists, is the next form of biological soil rely on organic amendments or green leaf
disinfection. Biological fungicides are a manures brought in from off site. Amendments
promising alternative to synthetic fungicides. such as fresh residues, composts, and manures
result in soil improvement through a
There are several new biocontrols available for proliferation of microflora.
suppressing root diseases (14). One product is
RootShield™, a biofungicide that controls root Green leaf manures are field-grown cover crops
diseases caused by Pythium, Rhizoctonia, that are chopped and harvested green, then
Fusarium, and Sclerotinia. RootShield contains transported inside the greenhouse to be
the fungus Trichoderma harzianum and is sold incorporated into the soil. Many studies have
either as granules or a drench. SoilGard 12G™ shown that crucifer residues from rapeseed and
is another biofungicide that controls Pythium, oilseed radish cover crops produce toxic gases
Fusarium, Rhizoctonia, Phytophthora and that suppress soilborne pathogens.
Thielaviopsis (when co-applied with sulfur). The Additionally, soil solarization, following
active ingredient is the fungus Gliocladium incorporation of cruciferous residues, increases
virens. SoilGard is sold as granules that can be the efficiency of soilborne pathogen control.
incorporated into the soil mix. Another product The role of composts as a slow-release nutrient
is MycoStop™, sold as a wettable powder. source in organic production is well established.
MycoStop contains the actinomycete Recently, the role of composts as amendments
Streptomyces griseoviridis and controls Fusarium, for the control of soilborne plant pathogens has
although it may control other root diseases. See increased interest in similar use in conventional
Appendix II: Biorational Pesticides for further agriculture. Much of the pioneering research on
information. this topic has been conducted by Dr. Harry
Hoitink (16–18) at Ohio State University.
Deny™ (from Stine Seed) contains the
bacterium Burkholderia (Pseudomonas) cepacia and In container production, disease
controls diseases caused by Rhizoctonia, -suppressive composts are commercially
Fusarium, and Pythium. It also provides some available in both peat and soil-based
nematode control. Intercept™ (from Soil media. Dr. Frank Regulski, who is
Technologies) also uses B. cepacia to control President of BioComp, Inc., an Edenton,
disease. N.C., company that developed a series of
disease-suppressive mixes, said that
Cultural practices that promote soil health suppressive properties come from a
include crop rotation and use of tilled-in crop certain composting technique that yields
residues and green manures or organic antibiotic (antagonistic) and competitive
amendments brought in from off site. (saprophytic) responses (19).

Natural disease-suppressive potting mixes— limiting disease spread, biological and pesticidal
based on composts—are available through control, and, most important, when available,
several commercial sources. These products resistant germplasm (21).
may, however, contain starter fertilizers and
wetting agents which would restrict their use in Environmental Control
organic certification programs. Contact the
manufacturers for clarification on these Temperature and humidity regulation—
ingredients. Some companies will blend a functions of heating and cooling, ventilation,
special batch that excludes restricted vapor pressure, and structure—are increasingly
ingredients, therefore making them suitable for becoming computerized. Expert software that
organic production. For more information on reduces disease-infective conditions while
these companies, ask for ATTRA’s publication promoting crop growth is available through
Disease Suppressive Potting Mixes commercial vendors.
<http://www.attra.org/attra-pub
/dspotmix.html>. This publication also Agricultural engineers at the Ohio Agricultural
discusses how to inoculate potting mixes Research and Development Center (OARDC) in
with mycorrhizae. Mycorrhizae colonize Wooster, Ohio, are knowledgeable about
plant roots and protect them against computer environment controlled greenhouses
certain pathogenic fungi, including and should be able to direct you to appropriate
various Pythium and Fusarium species systems. Contact:
(20).
Ohio Agricultural Research and
The Aerial Environment Development Center
1680 Madison Avenue
Foliar and stem diseases include gray mold Wooster, OH 44691-6900
(Botrytis), powdery mildew (Erysiphe spp.), early 330-263-3700
blight (Alternaria spp.), soft rot (Erwinia spp.),
and several other fungal and viral diseases Foliar Products
caused by Xanthomonas, Fusarium, and
Psuedomonas. Greenhouse growers have fewer alternative
control products for diseases than for insects.
Greenhouse climates are warm, humid, and Copper- and sulfur-based fungicides are the
wind-free—an ideal environment for the only commercial fungicides acceptable in
development of many foliar and stem diseases. certified organic programs. Coppers exhibit
For the majority of pathogenic fungi and both fungicidal and bacterial control properties.
bacteria, infection usually occurs when a film or Sulfurs are noted for control of mildews.
drop of water on the plant surface persists. Alternative disease control strategies, although
Unless temperature, humidity, and ventilation based more on grower's experience and limited
are well regulated, this surface water can remain research, include compost watery extracts (see
in the greenhouse until infection becomes ATTRA’s publication Compost Teas for Plant
assured (21). Disease Control for more information),
biodynamic herbal extracts (see ATTRA’s
Integrated disease management, therefore, is publication Biodynamic Farming and Compost
based on climate control for disease infection Preparation) and foliar feeding (see next page).
and optimum crop yield and quality. It
eliminates inoculum through high standards of Biofungicides for foliar disease control are also
hygiene (sterilizing soil or using soilless media, available. AQ10™ contains the fungus
obtaining disease-free planting material, Ampelomyces quisqualis and controls powdery
chlorine bleach rinses of footwear & equipment, mildew. Trichodex™ controls botrytis.
vegetative-free floors, etc.), cultural practices for TopShield™ contains Trichoderma harzianum and


controls botrytis and powdery mildew. Remedy should be applied at the first sign of
TopShield should become commercially disease and repeated at one- or two-week
available in 1999. See Appendix III: Biorational intervals until the problem subsides. A six-
Pesticides for further information. ounce bottle (enough to make 12 gallons of
spray) is available for $15 from:
Foliar Feeding
Gardener’s Supply Company
Foliar feeding is used by many organic growers 128 Intervale Rd.
to induce resistance to foliar disease. Seaweed Burlington, VT 05401
and fish emulsion are the two products most 800-955-3370
commonly applied. More sophisticated foliar
programs are being formulated in conjunction For more information on how to use baking
with refractometers and radionics instruments. soda, ask for ATTRA’s publication Using Baking
Although the mechanism for resistance is not Soda as a Fungicide.
clear, modification of the leaf surface and
enhanced plant nutrition is suspected. It has Related ATTRA Publications:
been stated that foliar fertilization indirectly
protects against plant pathogens by increasing Organic Potting Mixes
natural plant immunity through improvement Disease Suppressive Potting Mixes
of the plant's nutritional status (22). Integrated Pest Management
Using Baking Soda as a Fungicide
Evidence is also strong that foliar feeding can Compost Teas for Plant Disease Control
have a dramatic effect on the rhizosphere Biodynamic Farming and Compost Preparation
microflora via changes in root exudates (15). Greenhouse IPM:
Such changes in root exudates may lead to an Sustainable Aphid Control
increase of antagonists and thus enhance Sustainable Thrips Control
biological control of pathogens in the root Sustainable Whitefly Control
environment as well (15). Further information
on foliar feeding is available from ATTRA on
request.
References:
Baking Soda 1) Gentile, A.G., and D.T. Scanlon; Revised by
Tina Smith. 1992. A Guide to Insects and
Baking soda has for many years been used in Related Pests of Floricultural Crops in New
Europe as a mild fungicide by rose growers and England: For Commercial Growers. University
organic gardeners. Recently, plant pathologists of Massachusetts Cooperative Extension
at Cornell University confirmed through System. 36 p.
research that baking soda exhibits fungicidal
activity against powdery mildew and several 2) Kuack, David. 1995. Janet Bandy on
other diseases on ornamentals (23). They implementing an effective IPM program.
Greenhouse Management and Production.
determined that a mixture of 0.5% baking soda
April. p. 56–57.
(about 5 level teaspoons per gallon of water)
and 0.5% horticultural oil showed the greatest 3) Dutky, Ethel. 1995. Here’s how to cut your
activity. losses due to disease. GMPro. October.
p. 63–65.
A new product containing baking soda, called
Remedy™, is now available for use as a 4) Aylsworth, Jean. 1993. Biological controls catch
pesticide. Remedy is effective against black on with growers. Greenhouse Grower.
spot, powdery mildew, leaf spots, anthracnose, December. p. 77–78, 80–81.
phoma, phytophthora, scab, and botrytis.


5) Gillespie, D.R. 1995? Development of 14) Chase, A.R. 1998. New bactericides and
integrated pest management and biological fungicides for disease control on ornamentals.
control systems for the production of Greenhouse Product News. December.
greenhouse crops. p. 22–24.
http://res.agr.ca/agassiz/studies/gill95.htm.
6 p. 15) Gindrat, D. 1979. Biological soil disinfection. p.
253–287. In: D. Mulder (ed.) Soil Disinfection.
6) DeAngelis, J.D. 1991. Introduction to Biological Elsevier Scientific Publishing Co., New York,
Pest Control in Greenhouses. Oregon State NY.
Univ. Extension Service, Corvallis, OR. 6 p.
16) Dr. Harry Hoitink
7) Lindquist, Richard K. 1998. Evaluations of non- Department of Plant Pathology
conventional pesticides for insect and mite Ohio Agricultural Research and
control on greenhouse ornamental plants. Development Center
Greenhouse Product News. July. p. 52–55. The Ohio State University
1680 Madison Avenue
8) Klassen, Parry. 1993. Mulling over methyl Wooster, OH 44691-4096
bromide. Greenhouse Grower. August.
p. 118 & 120. 17) Hoitink, Harry A., and Peter C. Fahy. 1986.
Basis for the control of soilborne plant
9) Mahrer, Yitzhak. 1991. Physical pathogens with composts. Annual Reviews of
properties of solar heating of soils by Phytopathology. Vol. 24. p. 93–114.
plastic mulching in the field and in
glasshouses and simulation models. p. 18) Hoitink, H.A.J., Y. Inbar, and M.J. Boehm. 1991.
75, 81–86. In: Jaacov Katan James E. Status of compost-amended potting mixes
DeVay (ed.) Soil Solarization. CRC naturally suppressive to soilborne diseases of
Press, Boca Raton, FL. floricultural crops. Plant Disease. September.
p. 869–873.
10) Garibaldi, Angelo, and M. Lodovica
Bullino. 1991. Soil solarization in 19) Roberts, Dan R. 1992. Insect-,
Southern European countries, with disease-suppressive mixers help
emphasis on soilborne disease control of growers minimize crop losses.
protected crops. p. 227–235. In: Jaacov Greenhouse Manager. September.
Katan and James E. DeVay (ed.) Soil p. 68, 70–71.
Solarization. CRC Press, Boca Raton,
FL. 20) Anon. 1992. Mycori-Mix contains
beneficial fungi, suppresses pythium.
11) Horiuchi, Seizo. 1991. Soil solarization Greenhouse Manager. September.
in Japan. p. 215, 218–223, 225. In: p. 68.
Jaacov Katan and James E. DeVay (ed.)
Soil Solarization. CRC Press, Boca 21) Jarvis, William R. 1992. Managing
Raton, FL. Diseases in Greenhouse Crops.
American Phytopathological Society, St.
12) Gamliel, A. et al. No date. Solarization for the Paul, MN. p. 3, 5, & 220–221.
Recycling of Container Media. The Hebrew
University of Jerusalem, Rehovot, Israel. 22) Nowosielski, O. et al. 1988. A
Unpublished manuscript. 8 p. biological basis for the efficiency of
plant protecting foliar fertilizers in
13) Giblin, R.M., and S.D. Verkade. 1987. vegetable production. Acta
Solarization of small volumes of potting soil for Horticulture. Vol. 222.
disinfection of plant-parasitic nematodes. p. p. 105–116.
174–176. In: Proc. Fla. State Hort. Soc. Vol. 100.
23) Anon. 1990. Baking soda can ward off fungus.
Greenhouse Manager. June. p. 24.


Resources: Gill, Stanton and John Sanderson. 1998. Ball
Identification Guide to Greenhouse Pests and
Books: Beneficials. Ball Publishing, Batavia, IL. 244 p.
Available for $67 from Ball Publishing (see address
above).
Applied Bio-nomics, Ltd. (ed). 1993. Biological
Technical Manual. Applied Bio-nomics, Ltd., Sidney,
Green, Thomas A. (ed.) 1998. 1998 IPM Almanac.
B.C. 490 p.
Gempler’s, Belleville, WI. 178 p.
A comprehensive text on the biology and use of
Excellent source of IPM info. Introduces the grower
beneficial insects and mites for biological control in
to IPM techniques. Provides comprehensive checklists
greenhouses. The manual includes biology, life cycles,
for specific crops and gives numerous resources.
release instructions, pesticide compatibilities, and crop
Available for $4.95 from:
programs for greenhouse tomatoes, poinsettias,
floricultural crops, and interior plantscapes. It has Gempler’s
been in revision for several years and is unavailable for 100 Countryside Dr.
purchase. However, you might be able to obtain a PO Box 270
copy through inter-library loan or at a used bookstore. Belleville, WI 53508
800-382-8473
Casey, Christine (ed.) 1997. Integrated Pest 800-551-1128 fax
Management for Bedding Plants. IPM No. 407. http://www.gemplers.com
Cornell University Cooperative Extension, Ithaca,
NY. 109 p. Hunter, Charles D. 1997. Suppliers of Beneficial
Covers scouting methods, how to develop and evaluate Organisms in North America. PM 97-01. California
a management strategy, case studies, key pests, Environmental Protection Agency, Department of
diseases and disorders, and biological controls. Also Pesticide Regulation. Sacramento, CA. 32 p.
contains sources of scouting supplies and scouting The booklet lists 143 commercial suppliers of more
forms. Available for $12.75 from: than 130 beneficial organisms used for biological
Media Services Resource Center control, including a special section on greenhouse
Cornell University biological control. The booklet can be downloaded
7-8 Business & Technology Park from their website, or free, single copies can be
Ithaca, NY 14850 obtained from:
607-255-2080 California Environmental Protection Agency
607-255-9946 fax Department of Pesticide Regulation
Environmental Monitoring and Pest
Cherim, Michael S. 1998. The Green Methods Management Branch
Manual: The Original Bio-Control Primer, 4th ed. Attn: Beneficial Organisms Booklet
Green Spot Publishing, Nottingham, NH. 238 p. 1220 N. Street, Room 161
Excellent resource on biological controls. Also Sacramento, CA 95814-5624
includes information on cultural and mechanical pest 916-324-4100
management methods. Available for $9.95 from: http://www.cdpr.ca.gov/docs/ipminov
The Green Spot, Ltd. /bensuppl.htm
Publishing Division
93 Priest Rd. Hussey, N.W. and N. Scopes (ed). 1985. Biological
Nottingham, NH 03290-6204 Pest Control: The Glasshouse Experience. Cornell
603-942-8925 University Press, Ithaca, NY. 240 p.
This book is a comprehensive work that explains the
Daughtrey, Margery and Christine Chase. 1992. The life cycles of both pests and biological control agents.
Ball Field Guide to Diseases of Greenhouse All of the major and minor greenhouse pests are
Ornamentals. Ball Publishing, Batavia, IL. 218 p. covered. This book is no longer in print, but you may
Available for $67 from: be able to get it through inter-library loan or at a used
Ball Publishing bookstore.
335 N. River St.
PO Box 9
Batavia, IL 60510
630-208-9080
http://www.growertalks.com


Lindquist, Richard. 1998. Identification of Insects Powell, Charles C. and Richard K. Lindquist. 1997.
and Related Pests of Horticultural Plants. Ohio Ball Pest and Disease Manual. 2nd edition. Ball
Florists’ Assocation, Columbus, OH. 44 p. Publishing, Batavia, IL. 426 p.
Illustrates the life cycle and crop damage of ten major Features specific information on plant pathology and
pests. The 20-page Appendix: Insect Cocktail entomolgy in flower and foliage crops. Contains
provides information on combining chemical and detailed diagnostic and corrective information.
biological tools for use against pests. Available for $27 Additionally, the Index of Host Plants, Diseases and
from: Pests is very helpful. Available for $63 from Ball
Ohio Florists’ Association Publishing (see address above).
2130 Stella Court, Suite 200
Columbia, OH 43215 Steiner, Marilyn Y. and Don P. Elliot. 1987. Biological
614-487-1117 Pest Management for Interior Plantscapes, 2nd edition.
Alberta Public Affairs Bureau, Edmonton, Alberta,
Malais, M. and W.J. Ravensburg. 1992. Knowing Canada. 32 p.
and Recognizing: The Biology of Glasshouse Pests An informative booklet on pest management in
and Their Natural Enemies. Koppert B.V., Berkel en interior plantscapes. The authors detail life cycle
Rodenrijs, Netherlands. 109 p. information and provide cultural, biological and
This book includes photographs, drawings, and life chemical control options for major greenhouse pests.
cycle diagrams for both pests and beneficials of Copies can be ordered for about $15 from:
greenhouse crops. In the U.S., it is available for $50 Pauline Coleman
through: Alberta Research Council
IPM Laboratories, Inc. Crop & Plant Management
P.O. Box 300 Bag 4000
Locke, NY 13092-0300 Vegreville, AB
315-497-2063 Canada T9C 1T4
315-497-3129 Fax 780-632-8211

Meister, Richard T. (ed.) 1999. Insect and Disease Greenhouse Grower magazine publishes IPM manuals
Control Guide. Meister Publishing, Willoughby, OH. on the control of greenhouse whiteflies and thrips.
602 p. The two publications, Win the War on Whiteflies, and
Extensive annual listing of controls for insects and Get a Grip on Thrips, are an assortment of selected
disease for greenhouse and field crops. Available for articles published in the magazine over the span of
$54 from: several years. They are available for $12 each from
Meister Publishing Company Meister Publishing Company (see address above).
37733 Euclid Ave.
Willoughby, OH 44094-5992 Articles:
800-572-7740
Email: meisterpro_sales@meisterpubl.com Greenhouse IPM in General:
http://www.meisterpro.com
Grossman, Joel. 1996. Entomological Society of
Jarvis, William. 1995. Managing Diseases in
America’s 1995 meeting--part 3: Nicotiana sugar
Greenhouse Crops. American Phytopathological
esters vs. whiteflies. The IPM Practitioner. April.
Press, St. Paul, Minnesota. 228 p.
p. 14–15.
This is the definitive text on managing diseases in
greenhouses. Included are useful sections on
Willmott, Jim. 1998. Reduce disease by managing
biological control and integrated disease management.
The style is more akin to an academic book rather the greenhouse environment. Northeast Greenhouse
than a grower’s manual, yet little else has been IPM Notes. October. p. 1–2.
published on this topic. It lists for about $85 + $5
s&h. Contact: Biological Control:
APS Press
3340 Pilot Knob Road DeAngelis, J.D. 1991. Introduction to Biological Pest
St. Paul, MN 55121-2097 Control in Greenhouses, EC 1376. Oregon State Univ.
612-454-7250 Extension Service, Corvallis, OR.


Gilkeson, Linda A. 1992. A pest-by-pest IPM primer. Periodicals:
American Vegetable Grower. May. p. 46, 48.
Bio-Integral Resource Center (BIRC) is a leader in the
Hoddle, M.S., R.G. van Driesche, J.P. Sanderson. field of integrated pest management. BIRC publishes
1998. Biology and use of the whitefly parasitoid The IPM Practitioner and Common Sense Pest Quarterly.
Encarsia formosa. Annual Review of Entomology. In addition, they publish a directory of IPM products
Vol. 43. p. 645–669. and beneficial insects. BIRC also offers booklets and
reprints on least-toxic controls for selected pests. For
Kuack, David. 1995. What's it take to be successful a copy of BIRC's catalog & list of services, contact:
with biologicals? Greenhouse Management and Bio-Integral Resource Center (BIRC)
Production. April. p. 22–26. P.O. Box 7414
Berkeley, CA 94707
Lowe, Peter. 1993. How to get started with 510-524-2567
biological control: Tips from a Danish grower. 510-524-1758 fax
Greenhouse Manager. September. Email: birc@igc.apc.org
p. 92, 94, 96, 98, 100. http://www.igc.apc.org/birc/

Matteoni, Jim, et al. 1993. Chemical effects on Cornell and Rutgers Cooperative Extension publish
greenhouse biological control agents. GrowerTalks. Northeast Greenhouse IPM Notes, formerly titled
August. p. 81–83, 85. Greenhouse IPM Update, a monthly newsletter
designed to help growers incorporate IPM into their
Wardlow, Leslie R. 1998. IPM in ornamentals: A operations throughout the growing season. The
guide to biocontrol. GrowerTalks. September. newsletter reports on new products, publications,
p. 78, 80, 82. and current issues in greenhouse IPM, as well as
providing the most up-to-date information on
IGRs: individual pests and crops. The hard copy version
costs $30 a year for growers and $25 for educators,
Immaraju, John and Timothy Wood. 1992. Insect but the newsletter is free over the Internet. Contact:
growth regulators widen the pest-control window. Northeast Greenhouse IPM Notes
Grower Talks. November. p. 55, 57, 59. Cornell Cooperative Extension
246 Griffing Avenue
Riverhead, NY 11901-3086
Biorational Pesticides:
516-727-7850
http://www.cce.cornell.edu/suffolk
Brownbridge, Michael. 1998. Making the most of
/greenhouse-notes/
biopesticides. Greenhouse Grower. July.
p. 85–86, 88, 93–96.
Connecticut Greenhouse Newsletter
Contact: Richard J. McAvoy
Brownbridge, Michael, Margaret Skinner, and Bruce
University of Connecticut
L. Parker. 1998. Factors affecting the efficacy of
Dept. of Plant Science
fungal preparations in ornamental pest management.
1376 Storrs Rd.
Ohio Florists’ Association Bulletin, No. 824. June.
Storrs, CT 06269-4067
p. 14–16.
860-486-0627
860-486-0682 fax
Miller, Fredric and Susan Uetz. 1998. Evaluating $9/year for 6 issues
biorational pesticides for controlling arthropod pests
and their phytotoxic effects on greenhouse crops. Midwest Biological Control News
HortTechnology. April-June. p. 185–192. Dept. of Entomology
University of Wisconsin
Diseases: 1630 Linden Dr.
Madison, WI 53706
Menzies, J.G., and R.R. Belanger. 1996. Recent 608-262-9914
advances in cultural management of diseases of http://www.wisc.edu/entomology/mbcn
greenhouse crops. Canadian Journal of Plant /mbcn.html
Pathology. Vol. 18, No. 2. p. 186–193. $18/year for 12 issues

Growing for Market Web Sites:
P.O. Box 3747
Lawrence, KS 66046 http://www.canr.uconn.edu/ces/ipm/
800-307-8949 University of Connecticut’s web site on IPM and
785-748-0605 greenhouse IPM
785-748-0609 fax
$27/year for 12 issues http://www.nysaes.cornell.edu/ipmnet/index.html
IPM in the Northeast Region; web site
Trade Publications: maintained by Cornell University

Greenhouse Grower http://www.barc.usda.gov/psi/bpdl/bioprod.htm
Meister Publishing Company Commercial Biocontrol Products for Use Against
37733 Euclid Ave. Soilborne Crop Diseases
Willoughby, OH 44094
440-942-2000 Video:
440-942-0662 Fax
$29/year for 12 issues; Buyer’s Issue every summer Integrated Pest Management in Greenhouses. 27
has lists of pest control suppliers minutes.
Shows the unique problems and opportunities
GMPro (Greenhouse Management & Production) involved with managing pests in production
Branch-Smith Publishing greenhouses. Covers economic thresholds and how to
PO Box 1868 apply an IPM program to coordinate physical,
Fort Worth, TX 76101 biological, cultural, horticultural, and chemical
800-434-6776 controls. Comes with a 72-page book on greenhouse
817-882-4120 pest problems. Available for $95 from:
817-882-4121 Fax San Luis Video Publishing
http://www.greenbeam.com PO Box 6715
12 issues/year; free to qualified greenhouse growers; Los Osos, CA 93412
$96/year for non-growers 805-528-8322
805-528-7227 fax
Greenhouse Product News
Scranton Gillette Communications, Inc. Conference:
380 E. Northwest Hwy.
Des Plaines, IL 60016-2282
The Society of American Florists holds an annual Pest
847-298-6622
Management Conference in February. This is usually
847-390-0408 Fax
a three-day event that focuses on pest management in
Email: editorgpn@aol.com
ornamental crops. Annual conference proceedings
http://www.greenhouseproductnews.com
are available for $17.95. For more information,
$30/year for 12 issues
contact:
Society of American Florists
GrowerTalks
1601 Duke St.
Ball Publising Co.
Alexandria, VA 22314
P.O. Box 9
800-336-4743
335 N. River Street
Batavia, IL 60510-0009
630-208-9080 Biological Control Suppliers
630-208-9350 Fax
Email: GrowerTalk@aol.com or gtalks@xnet.com A-1 Unique Insect Control
http://www.growertalks.com 5504 Sperry Dr.
$25/year for 14 issues Citrus Heights, CA 95621
916-961-7945
916-967-7082 fax
Email: ladybugs@a-1unique.com
http://www.a-1unique.com


Abbott Laboratories Florikan ESA Corp.
1401 Sheridan Rd. 1523 Edger Place
Dept. 44C, Bldg. A1 Sarasota, FL 34240
N. Chicago, Ill 60064 800-322-8666
800-323-9597 941-377-3633 fax
847-937-3729 fax Email: buglady@aol.com

ARBICO Inc. E.C. Geiger, Inc.
PO Box 4247 CRB Rt. 63, Box 285
Tucson, AZ 85738 Harleysville, PA 19438
800-SOS-BUGS 215-256-6511
520-825-2038 fax 215-256-6110 fax
Email: arbico@aol.com Email: geigerintl@hortnet.com
http://www.arbico.com
The Green Spot, Ltd.
Beneficial Insectary 93 Priest Rd.
14751 Oak Run Rd. Nottingham, NH 03290-6204
Oak Run, CA 96069 603-942-8925
800-477-3715 603-942-8932
530-472-3523 fax 603-942-5027 voice mail
Email: bi@insectary.com Email: GrnSpt@internetMCI.com
http://www.insectary.com
Harmony Farm Supply
BioLogic Co. 3244 Hwy. 116 No. F
PO Box 177 Sebastopol, CA 95472
Willow Hill, PA 17271 707-823-9125
Email: pyealber@epix.net 707-823-1734 fax
717-349-2789/2922 Email: kate@harmonyfarm.com
http://www.harmonyfarm.com
BioWorks
122 N. Genesee St. Hot Pepper Wax, Inc.
Geneva, NY 14456 305 Third St.
800-877-9443 Greenville, PA 16125
315-781-1793 fax 888-667-3785
724-646-2302 fax
Caltec Agri-Marketing Services Email: lindag@hotpepperwax.com
PO Box 576155 http://www.hotpepperwax.com
Modesto, CA 95357
209-575-1295 Hydro-Gardens, Inc.
209-575-0366 fax PO Box 25845
http://www.caltecag.com Colorado Springs, CO 80932
719-495-2266
Dow AgroSciences 719-531-0506 fax
9330 Zionsville Rd. http://www.hydro-gardens.com
Indianapolis, IN 46268-1054
800-258-3033 IGENE Biotechnology, Inc.
317-337-7374 fax 9110 Red Branch Rd.
http://www.dowagro.com Columbia, MD 21045
410-997-2599
Ecogen Inc. 410-730-0540 fax
2005 Cabot Blvd. W
PO Box 3023
Langhorne, PA 17271-3023
800-220-3326
215-757-2956 fax


International Technology Services Inc. Novartis Crop Protection, Inc.
PO Box 19227 PO Box 18300
Boulder, CO 80308-2227 Greensboro, NC 27419-8300
303-473-9141 800-334-9481
303-473-9143 fax 336-632-2861 fax
Email: intertechserv@worldnet.att.net http://www.cp.us.novartis.com

IPM Laboratories Olympic Horticultural Products
PO Box 300 PO Box 1885
Locke, NY 13092-0099 Bradenton, FL 34206-1885
315-497-2063 800-659-6745
315-497-3129 Fax 888-647-4329 fax
Email: olympic@hortnet.com
Koppert Biological Systems http://www.hortnet.com/olympic
2856 Main St. South
Ann Arbor, MI 48103 Plant Health Care
313-998-5589 440 William Pitt Way
313-998-5557 fax Pittsburg, PA 15238
800-421-9051
M&R Durango, Inc. http://www.planthealthcare.com/
PO Box 886
Bayfield, CO 81122 Praxis
970-259-3521 2723 116th Ave.
970-259-3857 fax Allegan, MI 49010
616-673-2793
Mycogen Crop Protection 616-673-2793 fax
5501 Oberlin Dr. Email: praxis@datawise.net
San Diego, CA 92121
800-745-7476 Rincon-Vitova Insectaries, Inc.
619-453-9089 fax PO Box 1555
Email: soares@mycogen.com Ventura, CA 93002
800-248-2847
Mycotech Corp. 805-643-6267 fax
PO Box 4109 Email: bugnet@west.net
Butte, MT 59702-4109
800-383-4310 Rohm & Haas Co.
406-782-9912 fax 100 Independence Mall West
Email: mycotech@montana.com Philadelphia, PA 19106
800-523-0762
Natural Pest Controls 215-592-2797 fax
8864 Little Creek Dr. http://www.rohmhaas.com
Orangeville, CA 95662
916-726-0855 SePRO Corp.
916-726-0855 fax 11550 N. Meridian St., Suite 180
Email: natpestc@cwnet.com Carmel, IN 46032-4562
http://www.naturalpestcontrol.com 800-419-7779
317-580-8290 fax
Nature’s Control Email: rogers@sepro.com
PO Box 35 http://www.sepro.com
Medford, OR 97501
800-698-6250 Sespe Creek Insectary
541-899-9121 fax PO Box 176
Email: bugsnc@teleport.com Lindsay, CA 93247
209-562-6464


Soil Technologies Corp. Uniroyal Chemicals
2103 185th St. Benson Rd.
Fairfield, IA 52556 Middlebury, CT 06749
800-221-7645 800-243-2850
515-472-6189 fax 203-573-3394 fax
Email: soiltech@lisco.com http://www.uniroyalchemical.com
http://www.lisco.com/soiltech
Wellmark International
Stine Seed Co. 1000 Tower Lane, Suite 245
2225 Laredo Trail Bensonville, IL 60106
Adel, IA 50003 800-842-3135
800-362-2510 630-227-6065 fax
515-677-2716
http://www.stine.com Whitmore Micro-Gen
3568 Tree Court Ind. Blvd.
Stoller Enterprises, Inc. St. Louis, MO 63122
8582 Katy Freeway, Suite 200 800-777-8570
Houston, TX 77024
800-539-5283 Wilbur-Ellis Co.
713-461-4467 fax 191 W. Shaw Ave., Suite 107
Fresno, CA 93704-2876
Thermo Trilogy Corp. 209-226-1934
9145 Guilford Rd., Ste. 175 209-226-7630 fax
Columbia, MD 21046
800-847-5620
301-604-7015 fax
http://www.thermotrilogy.com By Lane Greer and Steve Diver
NCAT Agricultural Specialists
Troy Biosciences
2620 N. 37th Dr.
Phoenix, AZ 85009
602-233-9047 March 1999
602-254-7989 fax

THE ATTRA PROJECT IS OPERATED BY THE NATIONAL CENTER FOR APPROPRIATE TECHNOLOGY UNDER A GRANT FROM
THE RURAL BUSINESS-COOPERATIVE SERVICE, U.S. DEPARTMENT OF AGRICULTURE. THESE ORGANIZATIONS DO NOT
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AT THE UNIVERSITY OF ARKANSAS IN FAYETTEVILLE AT P.O. BOX 3657, FAYETTEVILLE, AR 72702. ATTRA STAFF
MEMBERS PREFER TO RECEIVE REQUESTS FOR INFORMATION ABOUT SUSTAINABLE AGRICULTURE VIA THE TOLL-FREE
NUMBER 800-346-9140.


Appendix I: Monitoring and Scouting Techniques for Greenhouse Plants *

Plant Shore Fungus Leaf- Mealy- Broad Spider Soft Armored White- Cater-
Aphids Bugs Flies Gnats Miners bugs Mites Mites Scales Scales Slugs Thrips flies pillars

Monitoring:

Hot pink sticky cards at top of X
plant
Yellow sticky cards at top of X X X X X X X
pot
Horizontal sticky trap at top of X X X X
pot
Trap/Indicator plants X X X X

Place piece of potato on media X X

Scouting:

Inspect underside of leaf X X X X X X X X

Inspect upper surface for X X
stippling/small white spots
Inspect leaves for mines X
within tissue
Inspect new growth or X X X X
terminal for feeding
Lightly blow into flowers and X
look for movement



Tap flowers over white surface X X X
& look for movement
Press lower leaf on white card X
and look for spots on card
White or brown spots on X
flowers
Dark area on buds that are just X
opening
Check for leaves on media for X X
feeding & larvae beneath

Observe for:

Honeydew or sooty mold on X X X X
leaves
Brown callused-like spots on X X
stems/leaves
White cottony mass on X
stems/leaves
Holes in leaves X X

Small clear skeletonized spot X X
on leaf
Cut edges of leaves X X

Frass on leaves X



Small black spots on leaves X X
(fecal drops)
Chlorotic (yellow) spots on X X X X X
upper leaf surface
Wilting of new growth X

Caste skins on leaf from X
molting insect
Curling of leaves X X

Distortion of new growth X X X X X

Main stems of plants X X X X X

Slime trail on leaf X

Buds fail to open or uneven X
opening of flowers
Webbing on leaves or flowers X

Gnat-like insects flying among X X
plants

* Source: Oetting, Ronald D. 1997. Table: Ornamentals - Greenhouse Plants. In: 1997 Insect Control Guide. Meister Publishing, Willoughby,
OH. p. 354-355


Appendix II: Beneficial Organisms*

Organism Supplier Pests Controlled Application/Comments

Amblyseius degenerans or Intl. Technology aphids
Iphiseius degenerans Services, IPM Labs.,
(predatory mite) Green Spot

Amblyseius fallacis or IPM Labs., Rincon- mites Release when pest levels are low. Prefer high humidity.
Neoseiulus fallacis Vitova, Green Spot
(predatory mite)

Anagyrus pseudococci Praxis mealybugs
(parasitic wasp)

Aphidius colemani Florikan, IPM Labs., aphids Release.5-2/sq. yd.; humidity should be 70-85%, temp. 65-77°F.
(parasitic wasp) Harmony Farm Release at first sign of pests and for 3 consecutive weeks
Supply, Praxis, thereafter. Sensitive to pesticides.
Rincon-Vitova, Green
Spot

Aphidius matricariae Arbico, Hydro- aphids 500-3000/A. Can be used in greenhouses all year long.
(parasitic wasp) Gardens, Green Spot

Aphidoletes aphidimyza Nature’s Control, aphids 1-3/10 sq.ft.; humidity should be 50-90%, temp. 60-80°F. Release
(predator midge) Intl. Technology when aphids are first observed; release lower numers for
Services, IPM Labora- preventive control; apply every two weeks. Active at night;
tories, Hydro-Gardens, sensitive to daylength.
Arbico, Praxis, Rincon-
Vitova, Harmony Farm
Supply, Green Spot

Aphytis melinus Arbico, Sespe Creek many scales 10,000-100,000/A; humidity should be 20-80%, temp. 65-95°F.
(parasitic wasp) Insectary, Harmony,
Hydro-Gardens, IPM
Labs, Natural Pest
Controls, Praxis, Green
Spot



Chilocorus spp. Praxis scales
(beetle)

Chrysopa carnea Natural Pest Controls, aphids, caterpillars, 1 lacewing/5-30 aphids; 1000 eggs/200 sq. ft. Apply every 1-3
(predator) Beneficial Insectary, mealybugs, scales, weeks as needed. May arrive as eggs, immatures, or adults.
Caltec, Arbico, A-1 spider mites, thrips,
Unique Insect Control, whiteflies
Praxis, Rincon-Vitova,
Hydro-Gardens

Chrysoperla rufilabris Arbico, Beneficial see above
(predator) Insectary, IPM Labs.,
A-1 Unique Insect
Control, Nature’s
Control, Praxis,
Rincon-Vitova

Chrysoperla spp. M&R Durango, see above
(predator) Florikan, Green Spot

Coccophagus lycimnia Praxis scale
(parasitic wasp)

Coleomegilla imaculata Arbico aphids, caterpillars, 1/sq. ft.; shipped as larvae and eggs.
(pink ladybird beetle) mites, scales, thrips,
whiteflies

Cryptolaemus montrouzieri Arbico, Caltec, Intl. aphids, mealybugs, 2-5/infested plant; humidity should be 70-80%, temp. 70-80°F.
(predator beetle) Technology Services, soft scales Larvae are cannibalistic; repeat as necessary for control; do not
IPM Laboratories, wear white while distributing.
Natural Pest Controls,
Nature’s Control,
Florikan, Harmony
Farm Supply, Hydro-
Gardens, Praxis, Rincon-
Vitova, Green Spot



Dacnusa siberica Arbico, Intl. Techno- leafminers 500-1000/A; humidity should be 50-90%; temp. 60-85°F. Apply
(parasite) logy Services, Natural at first appearance of pests.
Pest Controls, Praxis,
Koppert, Green Spot

Deraeocoris brevis Green Spot aphids, whiteflies,
(predator) thrips

Delphastus pusillus Arbico, IPM Labora- greenhouse whitefly, 2000/3000 sq. ft.; temperature should be 60-85°F. Will feed on
(predatory beetle) tories, Nature’s sweetpotato whitefly spider mites if no whiteflies are available. Should be used along
Control, Harmony Farm with Encarsia formosa and traps.
Supply, Hydro-Gardens,
Rincon-Vitova, Praxis,
Green Spot

Diaretiella rapae Arbico, Praxis aphids Release rates vary.
(parasite)

Diglyphus isaea Arbico, Harmony leafminers Temps. should be 75-90% and humidity around 80%.
(parasite) Farm Supply, Natural
Intl. Technology Serv.,
Green Spot

Encarsia formosa Arbico, Nature’s greenhouse whitefly, Release 1/sq. ft. weekly for 3 weeks when pest numbers are
(parasitic wasp) Control, IPM Labora- sweetpotato whitefly, low. Release 2-4/sq. ft. when pest numbers are high.
Tories, Intl. Technology silverleaf whitefly Apply when pests are first observed. Should be used
Services, Florikan, in conjunction with traps. May be used along with
Harmony Farm Supply, other beneficials. E. formosa is very susceptible to
Hydro-Gardens, Natural chemicals. Temps. should be at least 64°F. Re-apply
Pest Controls, A-1 Unique every two weeks.
Insect Control, Praxis,
Rincon-Vitova, Green
Spot

Encarsia luteola or E. deserti Hydro-Gardens whiteflies



Eretmocerus californicus or Beneficial Insectary, greenhouse whitefly, Capable of handling hot, dry temperatures. Introduce
E. eremicus Hydro-Gardens, IPM silverleaf whitefly, when whiteflies are first observed. May be used in
(parasitic wasp) Labs., Arbico, Praxis, sweetpotato whitefly combination with other beneficials such as green
Green Spot lacewings. Eretmocerus is more tolerant of pesticides
than Encarsia formosa.

Euseius spp. Praxis scale, mites
(predatory mite)

Harmonia axyridis Green Spot scale, whiteflies, Temps. should be 70-85°F; humidity around 70%.
(Asian lady beetle) mealybugs, aphids

Heterorhabditis bacteriophora M&R Durango, fungus gnats, crown Application rate varies; 1 million/3000 sq. ft. is suggested.
(beneficial nematode) Aribco, BioLogic, borers, thrips, cut- Nematodes need a moist environment to survive and move
Hydro-Gardens, worms, grubs, Jap. through soil. Apply in evening directly into growing medium.
Harmony Farm Supply, beetles, black
Plant Health Care, vine weevil
Green Spot

Hippodamia convergens A-1 Unique Insect aphids, mites, Release at dusk near an immediate food source. Spray plants
(lady beetle) (predator) Control, Arbico, whiteflies with water prior to release.
Caltec, IPM Labora-
tories, Natural Pest
Controls, Nature’s
Control, Harmony Farm
Supply, Hydro-Gardens,
Praxis, Green Spot

Hypoaspis miles Nature’s Control, fungus gnats, mites, Use 5000/200 sq. ft. Live and breed in the top ½” of soil.
(predatory mite) Arbico, Harmony springtails
Farm Supply, IPM Labs.

Hypoaspis miles Florikan, Harmony thrips 100-300/sq. meter
(predator) Farm Supply, Green
Spot



Iphiseius degenerans or Intl. Technology aphids
Amblyseius degenerans Services, IPM Labs.,
(predatory mite) Green Spot

Leptomastida enormis Praxis mealybug
(parasitic wasp)

Leptomastix dactylopii Praxis, Arbico, IPM mealybug
Labs.

Lindorus lophanthae or Harmony Farm armored scales 1-2/sq. ft. Release as soon as scales are detected.
Rhizobius lophanthae Supply, Arbico, Temps. should be 59-77°F, humidity 20-90%.
(black lady beetle) Green Spot

Lysiphlebus testaceipes Praxis aphids
(parasitic wasp)

Mesoseiulus longipes or Arbico, Nature’s spider mites Introduce at first sign of pests. Can tolerate hot, dry conditions
Phytoseiulus longipes Control, Harmony (humidity 40%, temp. 70-90°F). Tolerates extremes of temp. and
(predator) Farm Supply humidity better than other mite predators.

Metaphycus helvolus Arbico, IPM Labs., scale Temps. should be 73-87°F; RH 50%. Do not overwinter in
(parasite) Harmony Farm cold climates. They are attracted to lights and sticky traps.
Supply, Natural
Sespe Creek Insectary,
Green Spot

Neoseiulus spp. or Amblyseius spp. (predatory mites)
N. barkeri IPM Laboratories, broad mites, thrips 10-30/plant per week.
Arbico

N. californicus Arbico, Beneficial spider mites Can tolerate hot conditions (humidity 60% min.; temp. 70-90°F).
Insectary, Caltec, IPM Introduce at first sign of spider mites. Can survive absence of
Labs., Nature’s Control, prey longer than other predator mites.
Harmony Farm Supply,
Hydro-Gardens, Rincon-
Vitova

Integrated Pest Management for Greenhouse Crops

Integrated Pest Management for Greenhouse Crops

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