Sorghum

Can be used to reduce moisture content in sorghum grain. Apply at physiological maturity, when kernels at the base of the sorghum head show black-layer formation. Most effective when application is followed by dry, sunny weather. Apply by aircraft or ground equipment 7 to 10 days before harvest. Use spray adjuvants as recommended on the label. Can be applied in 28% UAN carrier to enhance foliar desiccation and to apply nitrogen for the succeeding crop.

Use for feed grain production only. For preharvest desiccation of sorghum foliage and grain, apply when grain moisture is 30% or less. This coincides with black layer on kernels in the lower part of the heads. After application, a 7-day harvest delay is required, and a 2-week delay is recommended to give glyphosate time to work. Apply aerially or by ground.

May be applied, alone or tank mixed with other desiccants, to physiologically mature sorghum. Apply with 1% v/v COC. Good spray coverage is essential. Allow at least 3 days between application and harvest.

Apply as spot treatment to control annual and some perennial weeds. Apply at stage of weed growth recommended on glyphosate label but before heading of sorghum. Sorghum in treated area will be killed. Avoid spray drift outside target areas.

Apply when freestanding sorghum is at least 12 inches tall. Use precision-directed spray equipment adjusted so that no more than the lower 3 inches of sorghum stem is contacted by paraquat. Always add NIS, but do not tank mix with liquid fertilizer. Paraquat can only be handled and applied by licensed individuals.

Numerous formulations of 2,4-D are available. Weedar 64 contains 3.8 lb/gal dimethylamine salt. Savage is a dry soluble formulation containing 95% dimethylamine salt. Weedone 638, Weedone LV4, and Weedone LV6 contain 2.8 lb, 3.8 lb, and 5.7 lb/gal, respectively, of the butoxyethyl ester. Hi-Dep contains 3.8 lb/gal of the dimethylamine and diethanolamine (mixed amine) salts. Salvo and SEE 2,4-D LV4 contain 5 lb and 3.8 lb/gal, respectively, of iso-octyl ester. Application rates, spray volumes, and timings differ with company and formulation.

Apply postemergence to sorghum from the V3 stage to 12 inches tall for residual control and control of small emerged weeds that haven’t exceeded the 2 leaf stage. Use the lower rates on coarse textured soils and higher rates on fine textures soils. Apply with COC at 1% v/v for control of emerged weeds. The combined amount of Bicep II Magnum from all applications to sorghum must not exceed a total of 2.58 qt/a and the combined amount of atrazine from all sequential applications of atrazine containing products should not exceed 2.5/a per calendar year.