A translocated, residual herbicide for the control of woody weeds.
7 APPLICATION METHODS AND TIPS:
Best results when plants are actively growing.
Apply to dry plants.
Maximum tank storage time - 1 week.
Spray oils may improve weed control but may reduce selectivity on the crop.
10 WATER QUALITY:
14 HERBICIDE RESISTANCE:
Unlikely to occur under normal use patterns. However, there may be populations of weeds that have or will develop resistance.
18 PROTECTIVE CLOTHING:
Cotton overalls, washable hat, elbow length neoprene gloves and face shield or goggles.
RE ENTRY PERIOD.
Wear protective clothing until the spray has dried.
20 MODE OF ACTION:
Uptake and translocation:
Absorbed through roots, leaves, bark or from the cut stump.
Hormone herbicide with wide ranging effects. Disrupts plant cell growth.
Residual Life and Breakdown:
Broad leaf species are generally more sensitive than grass species.
23 PLANT SYMPTOMS:
Leaves usually turn red within a few weeks of application then fall off.
Harmful if swallowed. Will irritate eyes, nose, throat and skin.
Poison Schedule - S6
Mammalian toxicity - Low.
Acute oral LD50 - >2000 mg/kg (rats), [For comparison table salt is 3000 mg/kg].
Skin - Acute dermal LD50 - > 2000 mg/kg (rabbit). Prolonged or repeated contact may cause moderate irritation or burn.
Eye - May cause temporary, moderate eye irritation.
Vapour inhalation - LC50 - Low. Excessive exposure to solvent inhalation may cause eye and respiratory irritation, headache, dizziness and narcotic effects.
Chronic oral toxicity NOEL (picloram) - 0.5-7 mg/kg/day for two years.
Not mutagenic or teratogenic (i.e. does not cause cancer or reproductive problems).
Does not accumulate in the body.
Other Species -
Birds - Triclopyr has slight to low toxicity. Picloram has low toxicity.
Fish - Triclopyr butoxyethyl ester is toxic to fish and moderately toxic to other aquatic organisms. In soil and water it breaks down to triclopyr acid which has low toxicity. Picloram has low toxicity.
Invertebrates - toxicity.
Bees - Triclopyr and picloram have low toxicity.
Livestock - Triclopyr butoxyethyl ester is moderately toxic to livestock. In soil and water it breaks down to triclopyr acid which has low toxicity.
Triclopyr and picloram do not accumulate in animal systems.
25 TOXICITY SYMPTOMS:
26 FIRST AID:
Contact a doctor or Poisons Information Centre on 13 11 26.
If Swallowed - Contact a doctor immediately. Do not induce vomiting unless instructed by a doctor. Never give fluids or induce vomiting if the patient is unconscious or convulsing.
If on Skin - Wash skin thoroughly with soap and water.
If in Eyes - Flush with water for 15 minutes. See a doctor.
If Inhaled - Remove patient from contaminated area to fresh air.
Advice to Doctor
Treat symptomatically with supportive care.
27 ENVIRONMENTAL FATE:
Picloram ester and triclopyr ester are rapidly converted to the parent acids in soil, water, plants and animals.
Picloram is more residual than triclopyr.
Picloram has a half life in water of 1 to 40 days in water depending mainly on sunlight intensity. It is broken down in water by ultra violet radiation and is stable to hydrolysis at neutral to alkaline pH. It is broken down in soil by photo degradation and microbial action and has a half life in soil ranging from weeks to months. It normally remains in the top 30 cm of soil but may be found deeper on soils with poor adsorption properties.
Triclopyr decomposes in water with a half life of 1 to 2 days. It is broken down in soil by photo decomposition and microbial action and has a half life in soil of about 40 days. Minimal leaching may occur on light soils in high rainfall conditions.
It has an EPA classification for soil mobility that ranges from
Ground water contamination is possible.
It is stable in intact plants.
It can move in run-off water after heavy rainfall events as it dissolves in water rather than attaching to soil particles.
Replanting intervals - 12 months for most species to 4 years for some species. Accumulation in milk and tissues has not been found.
Water solubility at 25 C. - emulsifiable
Oil solubility - Soluble? Not normally mixed with oils.
Octanol:Water ratio at 25 C. - at pH 5;
picloram acid 6.15 x 10-7 mm Hg at 350C
triclopyr butoxyethyl ester 1.0 x 10-5 mm Hg at 330C
solvents 0.14 mm Hg at 200C.
Dissociation constant - pKa
Melting point - C.
Boiling Point - 183-210C (solvent)
Molecular weight -
Half life in water - 1-40 days.
Ashton, F.M. and Crafts, A.S. (1981) Mode of Action of Herbicides. (Wiley-Interscience publication).
Kearney, P.C. and Kaufman, D.D. (1976). Herbicides. Chemistry, degradation and mode of action. Vol 1 & 2.
6. Product colour : Brown liquid
7. Product Flammability : Not flammable. Flashpoint 82C (PMCC)
8. Dangerous Goods Class :
9. Shelf Life :
10. Mixtures Compatibility :
12. Effect of Soil Texture on Herbicide : May leach on very sandy soils under high rainfall.
13. Effect of Soil pH on Herbicide : Minimal.
14. Effect of Soil Organic Matter on Herbicide : Breaks down more quickly in high organic matter soils.
15. Mode of Action : Disrupts cell growth.
16. Application Timing : Wide.
19. Weeds Controlled : woody weeds
20. Effect on Crop : Not usually used in crop situations.
26. Recommended Water Volume : 3000-4000 L/ha for hand spraying. 200 L/ha for aerial spraying with droplets at 250-350 micron diameter.
27. Nozzle Type : No. 6 to 8 cone nozzle at 700-1500 kPa for hand spraying. Flat fan at 200-300 kPa for boom spraying.
28. Recommended Nozzle Pressure : 200 kPa
29. Recommended Filter Size : Mesh size as suitable for nozzle being used.
30. Recommended Wetter None
31. Other Additives : Pulse improves control on some weeds.
32. Rain Fastness : 1 hours.
33. Time Interval Before Effect is Noticed : 1 week to 1 month.
34. Weed Symptoms : Leaves turn red then fall off.
35. Effect of Herbicide/Disease Interaction on Crop : Don't spray stressed plants.
36. Withholding Period : Not required when used as directed on label. Don't apply to blackberries with mature or near mature fruit.
37. Plant-Back Period : Don't plant crops for 9-12 months after spraying.
Spray Tank Clean-Up : Drain tank and flush with water. Half fill with water and add 5g of alkali detergent (eg Surf®, Omo®, Drive®) per litre of water and circulate through system for at least 1 minutes then rinse through nozzles. Fill the tank with clean water and rinse and flush through nozzles to remove detergent. Remove the nozzles and screens and clean separately.
39. Other Comments :
Numbered data adapted from "Crop Herbicide Information " by A.J. Chambers.
Collated by HerbiGuide. For more information see www.herbiguide.com.au or phone 08 98444064.