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
4FARMERS IMAZETHAPYR 700 WG HERBICIDE
4 FARMERS AUSTRALIA PTY LTD
AC IMPALE HERBICIDE
AXICHEM PTY LTD
APPARENT IMAZETHAPYR 700 WG HERBICIDE
APPARENT PTY. LTD.
AW GENOA HERBICIDE
AGRI WEST PTY LIMITED
CONQUEST MAINSAIL 700 WG HERBICIDE
CONQUEST CROP PROTECTION PTY LTD
EASYFARM IMAZETHAPYR 700WG HERBICIDE
EASYFARM PTY LTD
EZYCROP IMAZETHAPYR 700 WG HERBICIDE
EZYCROP PTY LTD
FARMALINX BELTA 700 WG HERBICIDE
FARMALINX PTY LTD
FARMALINX THUNDERCAT 700 WG HERBICIDE
FARMALINX PTY LTD
FARMOZ VEZIR HERBICIDE
ADAMA AUSTRALIA PTY LIMITED
GENFARM IMAZETHAPYR 700 WG HERBICIDE
LANDMARK OPERATIONS LIMITED
IMAGE 700 WG HERBICIDE
GROW CHOICE PTY LIMITED
IMBIZO 700 WG HERBICIDE
HEXTAR CHEMICALS PTY LTD
IMTRADE AMAZE 700 WG HERBICIDE
IMTRADE AUSTRALIA PTY LTD
JANITOR 700 WG HERBICIDE
CHEMINOVA AUSTRALIA PTY LIMITED
MISSION IMAZETHAPYR 700 WG HERBICIDE
MISSION BELL HOLDINGS PTY LTD
NOVAGUARD IMAZETHAPYR 700 WG HERBICIDE
NOVAGUARD PTY LTD
NUFARM KYTE 700 WG HERBICIDE
NUFARM AUSTRALIA LIMITED
OZCROP IMAZETHAPYR 700 WG HERBICIDE
OZCROP PTY. LTD.
RAINBOW IMAZETHAPYR 700 WG HERBICIDE
SHANDONG RAINBOW INTERNATIONAL CO., LTD.
SKIPPER 700 WG HERBICIDE
SIPCAM PACIFIC AUSTRALIA PTY LTD
TITAN IMAZETHAPYR 700 WG HERBICIDE
TITAN AG PTY LTD
VEZIR 700 WG HERBICIDE
ADAMA AUSTRALIA PTY LIMITED
WELLFARM IMAZETHAPYR 700 WG HERBICIDE
WELLFARM PTY LTD
WHITESTAR IMAZETHAPYR 700WG HERBICIDE
AGRICULTURAL PRODUCT SERVICES PTY LTD
3 ACTIVE INGREDIENTS: Imazethapyr 700g/kg or 240g/L
IMAZETHAPYR 700 g/kg as a water dispersible granule
OR IMAZETHAPYR 240 g/L as an aqueous concentrate.
4 CHEMICAL GROUP: B
Imidazolinone. Inhibitor of acetolactate synthase. ALS inhibitor.
5 RELATED HERBICIDES:
Pyroxsulam 30g/L + cloquintocet-mexyl 90g/L
Tribenuron methyl 750g/kg
Metsulfuron 68g/kg + thifensulfuron 682g/kg
Imazapyr 250g/L or 750g/kg
Imazamox 33g/L + imazapyr 15g/L
Iodosulfuron plus mefenpyr
Iodosulfuron 100g/L + mefenpyr
Imazapyr 175g/L + imazethapyr 525g/L
Ethametsulfuron methyl 750g/kg
Imazapic 525 + Imazapyr 175g/L
Raptor WG 700
Imazamox 700 g/kg
Imazethapyr 700g/kg or 240g/L
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.
Rainfast in 1 hour for post emergent applications. Pre emergent applications are rainfast immediately and can be applied in the rain.
Frost effects: Severe frosting or prolonged cold conditions may reduce the crops ability to metabolise Spinnaker, and transient crop effects may result.
Inversions: Avoid application during low level inversions as excessive drift may occur.
Delta T and relative humidity: Avoid application when Delta T is greater than
Wetting agents: Use 200 mL BS 1000 or equivalent non ionic wetter for post emergent applications.
Spray oils: Not necessary but can be used if required by companion pesticides.
Ammonium sulphate at 2 kg per 100 L spray mix often improves efficacy of post emergent applications especially on summer weeds.
10 WATER QUALITY:
Hard water: Tolerant to normal hard water.
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.
Carrier volume: 50-100 L/ha water.
Nozzles: 1100 Flat fan.
Pressure: 150-400 kPa.
Droplet size: 200-250 micron VMD.
Filter Size : 100 mesh.
Carrier volume: At least 20 L/ha air.
Nozzles: Use nozzles that deliver a droplet size of 230-280 microns VMD.
13 SPRAYER DECONTAMINATION:
Clean soon after spraying to reduce the risk of forming dried deposits that may be difficult to remove.
Remove nozzles and filters and clean separately. Triple rinse with soapy water (eg 500 mL or g of Drive, Dynamo, Omo or Surf per 100 L water) or water plus 0.25% wetting agent and run through boom. This procedure is sufficient for spraying in other cereals or non selective applications.
Remove the nozzles and filters and clean separately and soak in a mixture of 500 mL chlorine bleach (4%) per 10 L water for at least 30 minutes.
Rinse sprayer with soapy water (eg 500 mL or g of Drive, Dynamo, Omo or Surf per 100 L water) or water plus 0.25% wetting agent and run through boom. Drain tank and flush with clean water for a minimum of 10 minutes to 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.
Fill tank with clean water and add 300 mL household chlorine (4%) bleach per 100 L water, flush through hoses and boom then stand for 15 minutes with agitation engaged, repeat. Rinse tank, hoses and boom thoroughly with clean water to remove traces of bleach.
Rinse filters and nozzles in water and replace.
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.
15 REPLANTING INTERVALS:
All other crops
34 months for winter crop applications, 27 months for summer crop applications
Maize; IT tolerant
Wheat; IT tolerant
Canola; IT tolerant
*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
16 WITHHOLDING PERIODS:
17 RE-ENTRY PERIOD:
Wear protective clothing if in contact with the crop before the spray has dried.
18 PROTECTIVE CLOTHING:
Overalls, boots and washable hat. Use gloves and face shield when handling the concentrate.
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 and lower pre emergence rates are effective..
As organic matter and clay content increases the proportion of Spinnaker absorbed to the soil increases.
Soil moisture: 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.
In dry soil Spinnaker will be bound to soil particles making it unavailable for plant uptake. Best results in moist soils. Under waterlogged conditions plants may become stressed and crop damage may occur.
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.
Usually has good 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.
Chickpeas may show transient yellowing or reddening.
Do not use pre emergence on Collegian, Prussian Blue or Cressy field peas. Do not use this product post emergence on field peas other than Alma, Dun, Dundale, Early Dun and Wirrega.
Do 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.
Effect on Clover Species:
Clovers are more tolerant than medics, and post emergent applications are more suitable than pre emergence applications.
Effect on Medic Species:
Tolerance may be marginal on some varieties.
Effect on Lucerne:
Registered for use on seedling lucerne as a post emergence application after the crop has developed to at least the first trifoliate leaf stage.
Effect on Native Plants:
22 DISEASE AND INSECT EFFECTS:
Not recommended if crop is severely diseased.
23 PLANT SYMPTOMS:
Purple and yellow young growth, death of the growing points, stunting.
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.
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.
Low toxicity to mammals, birds, fish or bees. Irritating to eyes.
Poison schedule: S5.
Acute oral LD50: >5000 mg/kg (rat), [For comparison table salt is 3000 mg/kg]. Low toxicity.
If SWALLOWED: Do NOT induce vomiting. Do NOT give anything by mouth to a semiconscious or unconscious patient. Make every effort to prevent vomit from entering the lungs by careful placement of the patient.
If in EYES: Irrigate with plenty of water for 5 minutes, remove contact lenses if present and irrigate for a further 15 minutes.
If on SKIN: Rinse with plenty of water, remove contaminated clothing, wash with soap and water.
If INHALED: Remove patient to fresh air. Over exposure by inhalation is not likely. Check for other causes if breathing is difficult.
Advice to doctor: Treat symptomatically.
Contact the Poisons Information Centre on 131126.
27 ENVIRONMENTAL FATE:
Half life in soil:
Half life in water: days at pH5 and 35 C.
It has an EPA classification for soil mobility that ranges from
Ground water contamination
Accumulation in milk and tissues.
Hydrolysis half life:
28 REGISTERED CROPS:
See HerbiGuide Species Solution tab.
29 REGISTERED WEEDS:
See HerbiGuide Species Solution tab.
30 REGULATION AND LEGAL:
CAS numbers: 81335-77-5
OPP Chemical Code:
Dangerous goods class (ADG): Not a dangerous good.
Proper shipping name:
International Maritime Dangerous Goods Code (IMDG):
R36 Irritating to eyes.
S13 Keep away from food, drink and animal feeding stuffs.
S2 Keep out of reach of children.
S25 Avoid contact with eyes.
S26 In case of contact with eyes, rinse immediately with plenty of water and seek
S46 If swallowed, seek medical advice immediately and show this container or
Colour: Green/black liquid or tan to cream granule.
Odour: Faint rubbery odour.
Form: Aqueous solution or water dispersible granule.
Water solubility: Product disperses in water. mg/L at 25 C at pH ;
Octanol:Water ratio: LogPow = 1.04 at pH 5; LogPow = 1.49 at pH 7; LogPow = 1.20 at pH 9;
Soil organic carbon absorption coefficient (Koc):
Vapour Pressure: at 25 C.
Dissociation constant: pKa = 3.9.
Melting point: C.
Boiling point: C.
Bulk density: 1.1-1.12.
pH: 3.46 (2% aqueous solution).
Flammability: Liquid is non flammable. Granules have a danger of dust explosion.
Corrosivity: Not compatible with aluminium. Do not sore in galvanised or unlined steel containers.
Shelf Life: years. Good.
(When Stored under Ideal Conditions)
Stable under normal conditions.
Extinguish possible sources of ignition. It is possible to get dust explosions.
Absorb liquid spills with earth, sand, clay or absorbent material such as vermiculite.
Sweep up granular spills with a shovel and broom and avoid creating too much dust which may create a dust explosion hazard.
Ventilate area after cleanup.
Extinguish with water spray, foam, carbon dioxide or dry agent.
Avoid direct water jets because airborne dusts may create an explosion hazard.
Toxic fumes may be released in fire. Wear breathing apparatus or avoid smoke.
Hazardous polymerization is not possible.
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.