Weed control

1. Weeds, Chemical & WHS
Tutorial

2. What are Agrichemicals?
 Any chemical that is used in the Agricultural industry
 Fuels
 Solvents - e.g. paint remover
 Pesticides
 Herbicides
 Fungicides
 Fertilisers
 Veterinary chemicals- e.g. drenches, vaccines,

3. What is the difference between the
different chemicals?
Chemical
 Pesticides
 Herbicides
 Fungicides
 Fertilisers
 Insecticide
Definition
 A chemical that destroys fungus
 A substance that is toxic to plants
and is used to destroy unwanted
vegetation.
 A substance used for destroying
insects or other organisms harmful to
cultivated plants or to animals
 A substance used for killing insects
 any substance such as manure or a
mixture of nitrates used to make soil
more fertile.

4. Weeds?
 A weed is any unwanted plant
 There are three main weed categories
 Noxious Weeds- identified as a threat to a district or
region. Government legislation required their control
 Agricultural weeds- plant species that reduce quantity &
quality of agricultural production to increase production
costs.
 Posion livestock- St Johns Wort, Cape Tulip
 Harbour vermin- blackberry
 Damage wool/hides- Noogoora Burr, Thistle
 Reduce crop growth/harvest- skelton weed
 Environmental weeds- plant species that invade natural
environment areas, and are not a native to that
area.

5. What do weeds do?
 Compete with other plants
 Water
 Light
 Nutrients
 Carbon dioxide
 Oxygen
 Pollinators
 Physical space
If water & nutrients are in abundant supply light is the
resource that weeds compete for as weeds have the ability to
grow quickly and shade out useful plants.

6. Why do Weeds Thrive & persist?
 Germinate & grow in a range of environmental
conditions
 Rapid seedling & vegetation growth
 Produce large numbers of seeds over long period
 Produce seeds which lay dormant in the soil for a
number of years
 Able to disperse seeds over long distances
 Lack of natural predators or diseases
 Unpalatable or toxic to grazing animals

7. How do you Control them?
 IWM
 Integrated weed management
 IPM
 Integrated Pest management
This is a management plan that considers a NUMBER of
control options

8. Ways to control Weeds
 There are Three categories that controls can come under
 Mechanical
 Chemical
 Biological