3 ACTIVE INGREDIENTS: 525 g/kg IMAZAPIC plus 175 g/kg IMAZAPYR as an aqueous concentrate.
4 CHEMICAL GROUP: - B.
Imidazolinone
5 RELATED HERBICIDES: Imidazolinones, Arsenal, Spinnaker, Pursuit.
6 GENERAL DESCRIPTION:
An ALS inhibiting herbicides
7 APPLICATION METHODS AND TIPS:
9 ADJUVANTS:
0.5% Hasten or Kwickin recommended.
10 WATER QUALITY:
Hard water
Colloids
pH
11 COMPATIBILITY:
Herbicides
Insecticides
Fungicides
Trace elements.
14 HERBICIDE RESISTANCE:
Repeated applications are likely to lead to resistance.
15 REPLANTING INTERVALS:
Rainfall from time of application to planting.
50-100 mm
100-150 mm
150-250 mm
more than 250 mm
Clearfield crops
Crops in Column 1
Crops in Column 1&2
Crops in Columns 1-3
Chickpea
Lentil
Biserrula
Barley
Clover
Lucerne
Lupins
Durum Wheat
Faba Bean
Medic
Triticale
Field Pea
Serradella
Wheat
Vetch
Wheat and Triticale are more tolerant than Barley and Durum Wheat. Oats are sensitive to soil residues.
Chickpea, Faba Bean and Field Pea can be planted where interim rainfall is less than 50 mm or where replanting is required after crop failure.
Ensure adequate zinc nutrition where herbicide residues are likely to be present.
18 PROTECTIVE CLOTHING:
20 MODE OF ACTION:
Knockdown and residual action.
Inhibits acetohydroxyacid synthase and acetolactate synthase which blocks the formation of three amino acids - isoleucine, leucine and valine. This disrupts protein and DNA synthesis and consequently cell growth.
Uptake and translocation:
Absorbed through shoots and roots, transported in xylem and phloem to the growing tips. The growing tips die soon after application but plant death may not be apparent for some weeks.
Physiological effects:
Residual Life and Breakdown:
Selectivity:
Essentially non selective and used mainly in IT tolerant crops.
Transient yellowing of the crop may occur under some conditions.
23 PLANT SYMPTOMS:
Yellowing especially of young growth, followed by purpling, death of the growing points , stunting and death.
Plants may take 4-6 weeks to die.
Capeweed, thistles and other species from the Asteraceae family may show stunting rather than death.
SECONDARY EFFECTS:
24 TOXICITY:
S5
Summary:
Details:
Mammalian toxicity -
Acute oral LD50 - mg/kg (rats), [For comparison table salt is 3000 mg/kg]
Acute dermal LD50 - > mg/kg (rabbit).
Skin - Irritant
Eye - Irritant
Vapour inhalation - LC50 - > mg/L air (rat).
Chronic oral toxicity NOEL - ppm for two years.
Not mutagenic or teratogenic (i.e. does not cause cancer or reproductive problems).
Other Species -
Birds - toxicity.
Fish - toxicity LC50 > ppm.
Invertebrates - toxicity.
Bees - toxicity.
25 TOXICITY SYMPTOMS:
26 FIRST AID:
27 ENVIRONMENTAL FATE:
It has a half life in soil that is longer in acid soils than in alkaline soils.
There is little or no hydrolysis.
It has a half life in soil of .months.
It has an EPA classification for soil mobility that ranges from
Ground water contamination
Replanting intervals - months.
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.
Field Crop Herbicide Information (A.J. Chambers):
Imazapic plus imazapyr.
2. Concentration of Active Constituent : 525g/kg Imazapic plus 175g/kg imazapyr
Trade Name : OnDuty
3. Formulation : Aqueous solution
4. Poison Schedule :
6. Product colour :
7. Product Flammability :
8. Dangerous Goods Class : None.
9. Shelf Life : Good.
10. Mixtures Compatibility :
11. Registered Crop(s) : IT tolerant canola and wheat.
12. Effect of Soil Texture on Herbicide : As organic matter and clay content increases the proportion of OnDuty absorbed to the soil increases.
13. Effect of Soil pH on Herbicide : Acid soils tend to increase to absorption of OnDuty, so persistence in acid soils may be prolonged. Not recommended on soils with pH less than 5 or greater than 8.5.
14. Effect of Soil Organic Matter on Herbicide : As organic matter and clay content increases the proportion of OnDuty absorbed to the soil increases.
15. Mode of Action : Root and shoot absorbed, translocated. Acetolactate synthase inhibitor and inhibits the production of several essential amino acids.
16. Application Timing : Post emergence.
17. Rate Variations : 20-55 g/ha
18. Rates Selection : Nil.
19. Weeds Controlled : Most.
20. Effect on Crop : Usually good crop selectivity. Short term crop effects can be seen where environmental or nutritional stress affect the crop. This product may cause transient yellowing and slight shortening plant internodes but plants soon recover and yield is unaffected. This effect may be more pronounced where it is used post emergence or under poor growth conditions.
IT Canola has greater tolerance than current IT wheats. Future IT wheats will have a second gene conferring greater tolerance.
21. Effect on Legume Species :
22. Soil Moisture at Application : Moisture content is the most important factor influencing absorption of OnDuty. As soil begins to dry, the amount of OnDuty in soil solution will decrease, thereby making it unavailable to the plant for uptake.
DRY - OnDuty will be bound to soil particles making it unavailable for plant uptake.
MOIST - Ideal
WATERLOGGED - Plants stressed and crop damage may occur.
23. Frost Effects : Severe frosting or prolonged cold conditions may reduce the crops ability to metabolise OnDuty and transient crop effects may result.
24. Frost Free Days Required After Application : Not applicable.
25. Effect of Application Water Quality on Herbicide :
Saline Water -
Soil Colloids -
26. Recommended Water Volume : 50-100 L/ha Boom.
27. Nozzle Type : 1100 Flat fan nozzles.
28. Recommended Nozzle Pressure : 220-280 kPa
29. Recommended Filter Size : 100 Mesh.
30. Recommended Wetter 200 mL BS 1000 or equivalent non ionic wetter for post emergent applications.
31. Other Additives : 0.5% Hasten or Kwickin.
32. Rain Fastness : 1 hours.
33. Time Interval Before Effect is Noticed : Depends on weed species and the available soil moisture. May be as soon as 10 days post application for sensitive species. Complete death may take several weeks.
34. Weed Symptoms : After pre emergence applications, susceptible weeds may emerge, however normal growth stops early in the weeds development. The first sign of activity is purple discolouration or a chlorosis of the youngest leaves, leading to necrotic growing points and stunted growth or death. On several weed species, stunting is the major symptom
35. Effect of Herbicide/Disease Interaction on Crop : Do not use if crop is severely diseased.
36. Withholding Period : 4 weeks for grazing or cutting for stock feed.
37. Plant-Back Period : None for Faba Beans, Field Peas, Chickpeas. 8 months for Lucerne, Lupins and Pasture legumes. 8 months for Wheat, Barley Triticale in areas with more than 300mm rain from spraying to sowing. 22 months for Oats and Safflower. 34 months for all other crops including Canola
*For Barley Triticale and Wheat in the following winter season - Don't apply OnDuty later than the end of July or August. Do not use where rainfall from spraying to sowing is expected to be less than 250 mm. Do not use on soils of pH 5.5 or less where rainfall from spraying to sowing is less than 400 mm
Spray Tank Clean-Up : Drain tank and flush with clean water for a minimum of 10 minutes. Use ammonia solution or washing soda for decontamination. Fill the tank with clean water and remove the nozzles and screens and clean separately.
39. Other Comments :
Acknowledgments:
Collated by HerbiGuide. For more information see www.herbiguide.com.au or phone 08 98444064.