Chlorsun 750Plant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

General Instructions:

This product is a selective herbicide designed to control certain weeds in wheat, triticale, barley, oats, and cereal rye.

This product is suitable as a pre-sowing treatment for wheat and triticale, and as a post-sowing treatment for wheat, triticale, barley, oats, and cereal rye. When used on emerged weeds, the product is absorbed by foliage and green stems and moves into the root system.

Prior to using this product, careful consideration should be given to soil pH. As soil pH increases, the rate of breakdown decreases. This product should not be used on soil with a pH of 8.6 or higher, as extended soil residual activity could adversely affect crop rotation options beyond normal intervals.

Crops other than wheat, barley, oats, triticale, and cereal rye can be extremely sensitive to low concentrations of this product in the soil. See Crop Rotation Recommendations.

Best weed control is obtained when rainfall or sprinkler irrigation wets the soil to a depth of 5 to 7.5cm within 4 weeks of application.

Pre-Sowing Incorporated by Sowing:

• WA only – Avoid applying to dry, sandy soils as rapid leaching may occur with early season rains.
• SA only – Before using rates greater than 15g/ha on light to medium soils pH 7 to 8.5, seek further advice.
• Conventionally Sown Crops – On soils less than 7, apply a spray just before sowing or in conjunction with the sowing operation. On soils with a pH of 7 or greater, it is not critical to time the spray just before sowing. Spray onto a non-ridged surface free of large clods.
• Use low profile 10cm combine points for sowing. Sow at speeds of 10 kph or greater. Use light covering harrows at sowing. If applied to dry soil and sowing is to be delayed, incorporate immediately after spraying to prevent loss by wind erosion.

Direct Drilled Crops:

Apply tank mixed with either Spray.Seed1 or glyphosate following the manufacturer's label recommendations.

Post Crop and Weed Emergence:

Where treatment is delayed or where weeds are not actively growing due to adverse conditions, results may be slow to appear, and weeds may be only stunted or suppressed.

Wheat, Tritical, and Cereal Rye – Apply after crop emergence when weeds are small and actively growing (Annual Ryegrass no more than 3 leaves, Broadleaved weeds no more than 5cm in height or diameter) (for Black Bindweed refer to specific recommendations).

Barley and Oats – Apply between the 2 leaf stage of the crop (3 leaf stage – SA only) and early tillering when weeds are small and actively growing (Annual Ryegrass no more than 3 leaves, Broadleaved weeds no more than 5cm in height or diameter) (for Black Bindweed refer to specific recommendations).

Resistant Weeds Warning:

Chlorsun 750 Herbicide is a member of the sulfonylurea group of herbicides. It has the inhibitor of the enzyme acetolactate synthase (ALS) mode of action. For weed resistance management, Chlorsun 750 Herbicide is a Group B Herbicide. Naturally-occurring weed biotypes resistant to Chlorsun 750 Herbicide and other ALS inhibitor herbicides (Annual Ryegrass and some broadleaf weeds) are known to exist.

Annual Ryegrass biotypes resistant to diclofop-methyl and other “grass specific” herbicides are often also resistant to Chlorsun 750 Herbicide. Before using Chlorsun 750 Herbicide on a population resistant to “grass specific” herbicides, have a resistance test conducted to ensure that it is still susceptible to Chlorsun 750 Herbicide.

Since the occurrence of resistant weeds is difficult to detect prior to use, Grow Choice Pty Ltd accepts no liability for any losses that may result from the failure of Chlorsun 750 Herbicide to control resistant weeds.

To prevent or at least minimize the risk of resistant weeds occurring, use Chlorsun 750 Herbicide in tank mixes (if appropriate) and/or rotations with herbicides having different modes of action effective on the same weed species. Large numbers of healthy surviving weeds can be an indication that resistance is developing. Efforts should be taken to prevent seed set of these survivors. DO NOT make more than one application of an ALS inhibitor herbicide to a crop, either pre-sowing incorporated by sowing or post-crop and weed emergence.

If the user suspects that an ALS inhibitor-resistant weed is present, Chlorsun 750 Herbicide or other ALS inhibitor herbicides should not be used.

Strategies to minimize the risk of herbicide resistance are available. Consult your farm chemical supplier, consultant, local Department of Agriculture, or Primary Industries.

Grazing Advice:

Avoid grazing treated areas within 24 hours of application to optimize weed control. A nil withholding period is applicable for grazing Chlorsun 750 Herbicide treated areas (when used as directed on this label).

Crop Safety:

DO NOT use this product for:

• Crops other than cereals.
• Cereals irrigated by furrows or flooding.
• Winter cereals undersown with legume pasture crops.
• Weed control where crops are under stress. Damage can occur where crops are stressed due to conditions such as excessive soil alkalinity or acidity, poor nutrient status, disease, nematode or insect infestation, adverse weather conditions, drought, or waterlogging. If crops become stressed after spraying, they may turn yellow or become retarded, but usually, they will recover with no reduction in yield.

Wheat:

DO NOT use this product for:

• Wheat varieties Cranbrook, or Miling.
• The wheat variety Vulcan if on acid soils and under stress conditions caused by waterlogging, frost, aluminum or manganese toxicity; reduced yields may result.
• Pre-sowing treatment of weeds in wheat varieties Avocet and Durati (OK for post-emergent use).
• Pre-sowing treatment of weeds in wheat variety Banks if soil pH is 5.5 or less (OK for post-emergent use).