Rates quoted in HerbiGuide are for the 700 g/kg granular products. Multiply rate by 2.91 if using the 240 g/L liquid products.
1 Trade name
CHEMAG AMAZE 700 WG HERBICIDE
IMTRADE AUSTRALIA PTY LTD
GENFARM IMAZETHAPYR 700 WG HERBICIDE
GENFARM CROP PROTECTION PTY LTD
NUFARM SPINNAKER 700 WDG HERBICIDE
NUFARM AUSTRALIA LIMITED
OSPRAY JANITOR 700 WG HERBICIDE
OSPRAY PTY LTD
TRADELANDS IMAZETHAPYR 700 WG SELECTIVE HERBICIDE
TRADELANDS PTY LTD
3 ACTIVE INGREDIENTS:
IMAZETHAPYR 700 g/kg as a water dispersible granule
OR IMAZETHAPYR 240 g/L as an aqueous concentrate.
4 CHEMICAL GROUP: - B.
5 RELATED HERBICIDES: Imidazolinones, Arsenal, OnDuty, Midas, Lightning, Flame.
6 GENERAL DESCRIPTION:
It is a broad spectrum, selective, residual herbicide mainly used in leguminous crops and pastures for both pre and post emergence applications. It is absorbed by the roots and leaves and translocated to inhibit the ALS synthase enzyme that is involved in the production of a number of essential amino acids.
7 APPLICATION METHODS AND TIPS:
Best results when applied to moist soil and rain follows a day or two later.
10 WATER QUALITY:
Cyanazine, diflufenican, diquat, diuron, glyphosate, metribuzin, Spray Seed, pendimethalin, simazine, trifluralin, dimethoate, omethoate, endosulfan. Don't tank mix with post emergent grass selective herbicides. Do not apply these herbicides following use of spinnaker until grasses have resumed growing.
14 HERBICIDE RESISTANCE:
Repeated applications are likely to lead to resistance in a number of grass and broadleaf species. This product will not control group B tolerant weeds.
18 PROTECTIVE CLOTHING:
Acid soils tend to have greater absorption of imazethapyr which increases it persistence in the soil. On high pH soils imazethapyr has greater initial soil activity.
20 MODE OF ACTION:
It inhibits the acetolactate synthase (ALS) enzyme which inhibits the production of several essential amino acids.
Uptake and translocation:
Absorbed by roots and shoots and translocated throughout the plant.
Residual Life and Breakdown:
A number of leguminous crops and pastures are tolerant to imazethapyr. Several crops including Wheat, Canola and Maize have been bred that are tolerant to the herbicide.
23 PLANT SYMPTOMS:
Purple and yellow young growth, death of the growing points, stunting.
Mammalian toxicity -
Acute oral LD50 - mg/kg (rats), [For comparison table salt is 3000 mg/kg]
Acute dermal LD50 - > mg/kg (rabbit).
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 of .months.
It has an EPA classification for soil mobility that ranges from
Ground water contamination
Replanting intervals - 0 to 34 months.
Accumulation in milk and tissues.
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):
2. Concentration of Active Constituent : 240 g/L or 700 g/kg
Trade Name : Spinnaker
3. Formulation : Aqueous solution or water dispersible granule.
4. Poison Schedule : 5
6. Product colour : Green/black liquid or cream granule
7. Product Flammability : Non flammable
8. Dangerous Goods Class : None.
9. Shelf Life : Good.
10. Mixtures Compatibility : Cyanazine, diflufenican, diquat, diuron, glyphosate, metribuzin, Spray Seed, pendimethalin, simazine, trifluralin, dimethoate, omethoate, endosulfan. Don't tank mix with post emergent grass selective herbicides. Do not apply these herbicides following use of Spinnaker until grasses have resumed growing.
11. Registered Crop(s) : Faba beans, Mung Beans, Peanuts, Soybeans, Sub clover, Field peas, Lucerne, serradella
12. Effect of Soil Texture on Herbicide : As organic matter and clay content increases the proportion of Spinnaker absorbed to the soil increases.
13. Effect of Soil pH on Herbicide : Acid soils tend to increase the absorption of Spinnaker, so persistence in acid soils may be prolonged. On high pH soils lower pre emergence rates are effective.
14. Effect of Soil Organic Matter on Herbicide : As organic matter and clay content increases the proportion of Spinnaker absorbed to the soil increases.
15. Mode of Action : Root and shoot absorbed, translocated. Acetolactate synthase inhibitor, as such, the product inhibits the production of several essential amino acids.
16. Application Timing : Pre emergence and post emergence.
17. Rate Variations : 200-400 mL/ha
18. Rates Selection : Lower rate depending on weed species, conditions and crop type. Higher rate where rainfall of 400 mm can be expected between application and planting of the following crop.
19. Weeds Controlled :
20. Effect on Crop : Usually excellent crop selectivity. Short term crop effects can be seen where environmental or nutritional stress affect the crop. This product may cause 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.
21. Effect on Legume Species : Clovers are more tolerant than medics, and post emergent applications are more suitable than pre emergence applications. Registered for use on seedling lucerne as a post emergence application after the crop has developed to at least the first trifoliate leaf stage.
22. Soil Moisture at Application : Moisture content is the most important factor influencing absorption of Spinnaker. As soil begins to dry, the amount of Spinnaker in soil solution will decrease, thereby making it unavailable to the plant for uptake.
DRY - Spinnaker 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 Spinnaker, 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, Minimum 20 L/ha air.
27. Nozzle Type : 1100 Flat fan nozzles. Aerial application use a droplet VMD of 230-280 microns.
28. Recommended Nozzle Pressure : 220-280 kPa
Recommended Filter Size : 100 Mesh.
30. Recommended Wetter 200 mL BS 1000 or equivalent non ionic wetter for post emergent applications.
31. Other Additives : Not required.
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 : Nil.
37. Plant-Back Period : Following use in winter crops
*For Barley Triticale and Wheat in the following winter season - Don't apply pre emergence Spinnaker later than the end of June or post emergence Spinnaker later than the end of July. Do not use where rainfall from spraying to sowing is expected to be less than 300 mm. Do not use on soils of pH 5.5 or less where rainfall from spraying to sowing is less than 400 mm
38. Spray Tank Clean-Up : Drain tank and flush with clean water for a minimum of 10 minutes. Fill the tank with clean water and remove the nozzles and screens and clean separately.
39. Other Comments : Do not use pre emergence on Collegian, Prussian Blue or Cressy field peas. Do not use this product for post emergence on field peas other than Alma, Dun, Dundale, Early Dun and Wirrega. Don not use post emergence on Faba Beans or Mung Beans. Do Not use pre emergence on soy beans other than Davis, Dragon and Forrest and post emergence on other than Davis and Forrest.
Numbered data based on Field Crop Herbicides by A.J. Chambers.
Collated by HerbiGuide. For more information see www.herbiguide.com.au or phone 08 98444064.