Sharpen herbicide provides both contact burndown and rate-dependent residual preemergence broadleaf weed control (refer to Table 1 and Table 2 for lists, respectively). It can be used in select field and row crops [chickpea (garbanzo beans), corn (field, seed, silage, and popcorn), cotton, edible pea, field pea, forage grasses (cool-season and warm-season), grass grown for seed, lentils, rice, small grains, sorghum, soybean], fallow and postharvest croplands, pasture, and in noncropland areas. Sharpen does not control grass weeds and must be used sequentially or tank mixed with a grass herbicide for a complete weed control program. Refer to Crop-specific Information section for recommendations on herbicide tank mixtures or sequential programs.
Make burndown applications of Sharpen when broadleaf weeds are small and actively growing. An adjuvant is required with Sharpen for optimum burndown activity (refer to Additives section for details). Burndown activity may be slowed or reduced under cloudy and/or foggy or cooler weather conditions, or when weeds are growing in drought or other stress conditions. When targeting dense weed populations and/or larger broadleaf weeds, use a higher application rate within an application rate range and/or higher spray volumes. Angling nozzles forward (to 45 degrees) may improve penetration of denser weed canopies.
Residual preemergence applications of Sharpen must be activated by at least 1/2 inch of rainfall or sprinkler irrigation before weed seedling emergence. When Sharpen is not activated, a labeled postemergence herbicide or cultivation may be needed to control weed escapes.
Sharpen may also be used for harvest aid/desiccation in select field and row crops (dry edible beans; dry peas; oilseeds canola (rapeseed) subgroup 20A; oilseeds cotton-seed subgroup 20C; oilseeds sunflower subgroup 20B; and soybean). Make harvest aid/desiccation applications when crops have reached physiological maturity or according to Extension Service recommendations in the use area.
Important: Always read and follow label instructions when buying or using this product.
|Registered for cultures||Rate||Preharvest Interval|
|Corn||2 - 3.5 fl oz|
|Cotton||0 fl oz|
|Beans||1 - 2 fl oz||2|
|Canola||1 - 2 fl oz||3|
|Safflowers||1 - 2 fl oz||7|
|Sunflowers||1 - 2 fl oz||7|
|Soybeans||1 - 2 fl oz||3|