|1 Trade name||Manufacturer||Form|
|OSPRAY HARASS HERBICIDE||FMC AUSTRALASIA PTY LTD||WATER DISPERSIBLE GRANULE|
3 ACTIVE INGREDIENTS: Thifensulfuron methyl 682 g/kg + metsulfuron methyl 68 g/kg.Formulation: Dry Flowable granule.
4 CHEMICAL GROUP: B - Sulfonylurea.
5 RELATED HERBICIDES:
Ally, Glean, Logran, Oust.
6 GENERAL DESCRIPTION:A post emergence, translocated, broad leaf herbicide for cereals.
7 APPLICATION METHODS AND TIPS:Best results on young actively growing plants when spray ids applied in fine weather with rain a day or two later.
Addition of a wetting agent may improve weed control on hard to wet species.
Don't use on Durum wheats.
10 WATER QUALITY:Hard water
pH - Breaks down more quickly in acidic water. Use spray solution within a few days of mixing.
11 COMPATIBILITY:Trace elements.
14 HERBICIDE RESISTANCE:Some plants may be resistant or develop resistance after multiple applications. Plant surviving spraying should be controlled by other means or with herbicides from different groups to reduce the build up of group B tolerant plants.
Populations of plants resistant to group B herbicides will not be controlled by Harmony.
18 PROTECTIVE CLOTHING:When handling concentrate wear elbow length PVC gloves and face shield or goggles.
19 SOIL:On acid soils with a pH less than 5.5 crop damage is more likely and crops are often retarded after spraying.
On alkaline soils the herbicide breaks down more slowly and may affect following crops especially legumes.
20 MODE OF ACTION:Uptake and translocation:
Mainly absorbed through the leaves with some root uptake.
Physiological effects:Inhibits the acetolactate synthase (ALS) enzyme.
Residual Life and Breakdown:Selectivity:
Don't use on Durum wheats.
23 PLANT SYMPTOMS:Discolouration of leaves, reduced growth, stunting and death. Cereals may show yellowing, dead tips on the leaves and reduced tillering.
Symptoms are normally apparent 1-4 weeks after spraying but may be slow to appear under adverse conditions.
SECONDARY EFFECTS:Not recommended on flood irrigated areas because of the possibility of herbicide moving in tail waters.
Low toxicity to humans and the environment.
Details:Mammalian toxicity - Low.
Acute oral LD50 - Low toxicity. >5000 mg/kg (rats), [For comparison table salt is 3000 mg/kg]
Acute dermal LD50 - > 2000 mg/kg (rabbit).
Skin - Mild irritant. Slight to moderate toxicity. Not a primary skin irritant and not a skin sensitiser.
Eye - Mild irritant. May cause tears, discomfort and temporary blurring of vision.
Vapour inhalation - Low toxicity. LC50 - > mg/L air (rat). Exposure may cause irritation and coughing.
Chronic oral toxicity NOEL - 25-7500 ppm for 18 months to two years.
Not mutagenic or teratogenic (i.e. does not cause cancer or reproductive problems).
Other Species - Thifensulfuron component
Birds - toxicity.
Fish - toxicity LC50 >100 ppm (Rainbow trout).
Invertebrates - toxicity.
Bees - toxicity.
Birds - low toxicity. LD50 mallard ducks > 2000 mg/kg and bobwhite quail > 5000 mg/kg diet.
Fish - low toxicity. LC50 rainbow trout and bluegill > 150 mg/L.
Invertebrates - low toxicity. LC50(48 hour) Daphnia > 150 mg/L. 21 day NOEL for survival and breeding > 150 mg/L.
Bees - low toxicity. LD50 > 25 ug/bee.
Earthworms - low toxicity. LC50 > 1000 mg/kg soil.
25 TOXICITY SYMPTOMS:Low toxicity means patients are unlikely to show any specific symptoms.
26 FIRST AID:If in eyes: Flush with water for 15 minutes. See a doctor.
If swallowed: No action is normally required. Contact a doctor if necessary.
If on skin: Wash with soap and water.
If inhaled: Give artificial respiration if not breathing. Give oxygen if breathing difficult. See a doctor.
Advice to doctor: Treat symptomatically.
27 ENVIRONMENTAL FATE:Residual life and weed control is shortest in warm, moist, acid soils with high organic matter.
It has a half life in soil of .
It has an EPA classification for soil mobility that ranges from
Ground water contamination is unlikely to be significant because whilst it is quite soluble and mobile enough to reach ground water it breaks down by chemical hydrolysis and is not likely to persist once the source of contamination has been removed.
Replanting intervals - 3 months to 2 years depending on rainfall, soil pH and organic matter levels. Persistence is longest in soils with high pH and low organic matter in low rainfall areas.
Accumulation in milk and tissues.
31 PROPERTIES:Water solubility at 25 C. - ppm at pH ;
Oil solubility -
Octanol:Water ratio at 25 C. - at pH 5;
Vapour Pressure at 25 C. -
Dissociation constant - pKa
Melting point - C.
Molecular weight -
Half life in water - days at pH5 and 35 C.
33 REFERENCES:3. Formulation : Solid dry flowable.
4. Poison Schedule : S5
6. Product colour : Tan
7. Product Flammability : May be ignited by heat or open flame. Keep away from heat sparks and flame. May form explosive mixtures with are under severe dusting conditions. Does not decompose or polymerise.
8. Dangerous Goods Class :
9. Shelf Life : Long if kept dry.
10. Mixtures Compatibility :
11. Registered Crop(s) : Cereals
12. Effect of Soil Texture on Herbicide : Residual life shorter in soils with high Organic matter.
13. Effect of Soil pH on Herbicide : High pH give longer residual life. Low pH may cause crop damage.
14. Effect of Soil Organic Matter on Herbicide : Reduces residual life.
15. Mode of Action : ALS inhibitor, Group B.
16. Application Timing : Post emergence.
17. Rate Variations :
18. Rates Selection :
19. Weeds Controlled : Broad leaf weeds.
20. Effect on Crop : Crop yellowing may occur.
21. Effect on Legume Species : Kills legume species.
22. Soil Moisture at Application :
DRY - Generally poorer weed control.
MOIST - Ideal.
WATERLOGGED - Increased crop yellowing or retardation may occur if waterlogging occurs soon after spraying.
23. Frost Effects : Increased crop yellowing or retardation may occur if frosts occur after spraying but they normally recover without yield loss.
24. Frost Free Days Required After Application :
25. Effect of Application Water Quality on Herbicide :
Saline Water -
Soil Colloids -
26. Recommended Water Volume : 50 L/ha for booms. 30 L/ha for aerial.
27. Nozzle Type : Flat fan.
28. Recommended Nozzle Pressure : 200- 450 kPa.
29. Recommended Filter Size : Mesh size as suitable for nozzle being used.
30. Recommended Wetter: Non ionic wetting agent.
31. Other Additives :
32. Rain Fastness : hours.
33. Time Interval Before Effect is Noticed : 1-3 weeks.
34. Weed Symptoms : Discolouration.
35. Effect of Herbicide/Disease Interaction on Crop : Increased risk of crop damage.
36. Withholding Period : 14-56 days.
37. Plant-Back Period : 3-14 months or longer on soils with less than 1.7% organic matter and/or pH greater than 8.6. Company recommends a minimum of 400 mm rainfall before replanting.
38. Spray Tank Clean-Up : Drain tank and flush with clean water for a minimum of 10 minutes. Fill tank with clean water and add 300 mL household chlorine (4%) bleach/100 L water, flush hoses and stand 15 minutes with agitation engaged, repeat. Rinse tank, hoses and boom thoroughly with clean water to remove traces of bleach. Remove and clean nozzles and screens separately. Remove all traces of liquid fertilisers or adjuvants containing ammonia, such as ammonium sulphate or ammonium nitrate, before adding chlorine bleach, because bleach and ammonia will react to release a toxic gas.
39. Other Comments :
Numbered data adapted from "Crop Herbicide Information"
Courtesy of A.J. Chambers, Vic. Dept of Food & Agric.
Acknowledgments:Collated by HerbiGuide. For more information see www.herbiguide.com.au or phone 08 98444064.