How does it work?
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Crest 520 is absorbed by the foliage and the roots and translocated to the growing points where it inhibits fatty acid production, resulting in the death of the plant.
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Selective control of grass weeds
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Crest 520 controls a wide range of annual and perennial grass weeds including; wild oats, summer grass, annual and perennial ryegrass, volunteer cereals, annual poa, mercer grass, kikuyu and paspalum.
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When to apply
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Ideally apply Crest 520 when grass weeds are young and actively growing. Larger weeds can be controlled at higher rates.
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Withholding Periods
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Peas, Lentils: Do not apply later than flowering.
Asparagus: Do not apply during the cutting season.
Onions: Do not apply within 5 weeks of harvest.
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Use rates for grass weed control:
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| | | | | | | | |  | Storksbill
Musky storksbill |
| | | | | Annual grass weeds including annual ryegrass, summer grass, barnyard grass, bristle grass and volunteer cereals
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| | | | | | | | | | Cocksfoot, prairie grass, Yorkshire fog, sweet vernal, soft brome (goosegrass)
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| | | | | | | | | | | | | | | Sod bound couch, mercer grass, browntop, ratstail, Indian doab, kikuyu, paspalum
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| | | | | Pampas grass, African feather grass
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NOTE: Hair grass and Chewings fescue will not be controlled at the rates given above. Crest will not control broadleaf weeds or sedges. Use low rates on seedling plants or actively regenerating rhizomes after cultivation. Use high rates on tillering plants or on established sod bound rhizomateous grasses.
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Spraying Oil
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Where spraying oil is required use Bonza at 500ml/100L of spray mix to optimise grass weed control.
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Crops and situations
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| Crest 520 may be applied over forestry species including Radiata pine and Eucalyptus species. To control broadleaf weeds in Radiata pine, Nu-trazine®, simazine, Nu-Terb® and Archer® herbicides may be added. Do not add Bonza spraying oil to mixtures of Crest 520 with either Archer or Nu-Terb.
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| | Crest 520 may be applied over seedling Radiata pine, Eucalyptus, Acacia, Casuarina and other seedling plantation and ornamental tree species. Where there is no previous experience, apply Crest 520 over a few plants before treating larger areas. Do not add Bonza® spraying oil.
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| | Apply Crest 520 in a mixture with Bonza spraying oil. Do not exceed 480ml/ha Crest 520 on lucerne.
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| | Crest 520 in mixture with Bonza spraying oil, should be applied as a directed spray around the base of trees. Avoid direct contact with the fruit.
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| | Apply Crest 520 at no more than 290ml/ha. Do not add Bonza spraying oil.
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| | Apply Crest 520, in mixture with Bonza spraying oil, after the final cut.
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| | Apply Crest 520, at no more than 290ml/ha, in mixture with Bonza spraying oil.
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Soil Residues
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Do not plant cereals, maize or grass crops within 12 weeks of treatment.
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Compatibility
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Crest 520 is compatible with triazine herbicides, Archer® and Prestige™. Do not apply Crest 520 in combination with other herbicides unless experience shows efficacy is not affected. Do not apply within 7 days of phenoxy herbicides. Crest 520 is also compatible with a wide range of insecticides.
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Further Information
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