1. Capeweed and
Paterson’s Control

2. A little bit about Seymour Ag:
• Website – SeymourAg.com.au
• New company Seymour Ag Supplies
• Been going for 7 months
• Belong to NRI
• Staff consists of
– Kate
– Jeanette
– Myself
Aim to provide great products
With good service and good advice

3. Capeweed & Paterson’s Curse

4. Capeweed & Paterson’s Curse

5. Capeweed & Paterson’s Curse

6. Capeweed & Paterson’s Curse

7. Controlling Paterson’s Curse &
Capeweed
Latest stages to control these weeds
Why??

8. Capeweed
• Likes false breaks – soil temp. 15 deg
• Early rains with 3-5 weeks dry best
• Rarely germinates after a late break
• Seed remains in soil for years
• On surface lasts for 2 years
• Wrapped in wool improves germination

9. Toxicity of Capeweed
• accumulate nitrate levels high enough (2-4.7% dry
matter) to cause toxicity to stock especially after
spraying with hormone herbicides like 2,4-D
• Early season spraying in warmer temperatures and in
dull weather is associated with increased risk of
toxicity
• Avoid grazing with horses, pigs and young or breeding
stock. Animals that have suffered previous nutritional
stress appear to be more susceptible to poisoning

10. Symptoms of Poisioning
• Depression, loss of appetite, pale mucous
membranes, salivation, gasping, muscle
tremors, staggering, collapse, coma and death.
• Cattle may suffer rapid death within an hour of
exposure

11. Paterson’s Curse
• Germinates on false break
• Not a good competitor
• Can germinate with a summer rain
• Seeds at up to 30,000 seeds per sq metre
• Extremely toxic to horses
• contains compounds known as pyrolizidine
alkaloids
• the metabolites of which cause cell death
in organs throughout the body

12. Paterson’s Curse
• Liver damage is cumulative
• Grazing on it in years when there is little
• Then suffering when it is a big year
• Non-preferred grazing -- first green pick

13. Paterson’s Curse
• Contains damaging alkaloids
• Damages sheep livers
• Copper toxicity ----------- care
• Cumulative
• Plants have higher alkaloid levels
at flowering

14. ALLELOPATHY
 Refers to the chemical inhibition of one species by another
 These chemicals can inhibit root & shoot growth & nutrient uptake
 Prevent other plants from using resources

15. Examples of Allelopathic Plants
• Examples are some gums (sugar gum), wattles, Casuarinas,
• Lucerne, clover, vetch and Patersons curse and capeweed?

16. What does this mean?
• These weeds will out compete pasture
• Leave bare ground in summer
• More potential for these two weeds
• Paterson’s Curse can produce 30,000 seeds
per square metre

17. Control Methods
• Control when the weeds are small
• Have some competition for bare space
• Plant competitive species
– clover, ryegrass

18. Control Methods
Spray-Graze
• sub-lethal doses of chemicals
• “sweetens” up weeds making it
attractive to stock
• Must graze heavily after 7 days
• Need good mix of other species
• Take stock off enabling pasture to
recover

19. Chemical Control
Broadstrike /Multitude
• 25g per ha – low rate
• Very “soft”, clover, lucerne, grass safe
• Add wetter
• Works best on sunny days
• Good on wild radish, mustards,
• Add wetter, oil
• Add Igran /Salvation for
increased control

20. Chemical Control
Trigrex – Nugrex – various
• Combination mixed product
• Great on smaller weeds
• Safe on clovers etc
• Graze after will improve control
• Stick to the above brands – different
solvents
• Wetter

21. Chemical Control
Agtryne
• Combined trybryne and MCPA
• Single rate – single product
• Great for heavy infestations
• Some clovers are effected
• Rates –
• Don’t add wetter!!! There is enough in it

22. Chemical Control
Igran/Salvation + MCPA
• Mix the rate to suit the weed size
• Start with 300+300 – move up to 500+500
as weeds get bigger
• Can be used alone if needed but MCPA seems
• To soften Salvation
• No Wetter
• Prefer Salvation as it has a new
cold stable formulation!!

23. Chemical Control
Metsulfuron – Brushoff, Ally, various
• Low rates --- Add wetter
Care needs to be taken cleaning sprayer
• Will kill clover – cannot plant pasture
as there is a residual

24. Chemical Control
• And of course Amine 625
• Only spray between April and August
• Must graze or weeds will recover
• 500 mls/ha
• Many brands

25. Summary
1. Identify the weeds
2. SPRAY EARLY – let the pasture take over
3. Have good pasture species to dominate
4. Don’t graze good pasture to leave bare ground
5. Plant alternative vegetation
SPRAY EARLY

26. MOST IMPORTANT
SPRAY EARLY
-Plan Now!!
See us at Seymour Ag Supplies
36 High Street Seymour
Site 106 - 107
03 5792 1855
Rob-- 0408 882 698

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