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Field Bindweed Control in Pastures
Control in Pastures and Non-Cropland
Field bindweed growing in pastures may be treated with picloram (Tordon) or dicamba (Banvel/Clarity). Picloram at 0.5 to 1 pound per acre (1 to 2 quarts per acre of Tordon 22K) plus 2,4-D at 0.5 to 1 pound per acre (1 to 2 pints per acre) will give long-term control of field bindweed, will not injure most established grasses, and is the most economical treatment in a large area. Apply picloram plus 2,4-D when field bindweed has at least 12 inches of growth and is actively growing. Use the lower rate of picloram or discontinue picloram use in pasture at least two years prior to seeding of small grain crops. Do not plant broadleaf crops until an adequately sensitive bioassay shows that no residue is detectable in the soil. When picloram has been applied at 0.5 pound per acre or more, do not cut grass for feed within two weeks after treatment. Meat animals grazing within two weeks after application should be removed from treated areas three days prior to slaughter. Do not graze dairy animals on treated areas within two weeks after treatment. Picloram is excreted in the urine, so livestock should not be transferred from treated areas to sensitive broadleaf crops for 12 months after application without first allowing seven days of grazing on untreated grass.
Dicamba can be used in pastures at 4 to 8 pounds per acre (4 to 8 quarts per acre of Banvel/Clarity). Apply dicamba when field bindweed has at least 12 inches of regrowth and is actively growing. Do not graze meat animals in treated fields within 30 days of slaughter. The required delay between treatment and grazing of dairy animals or cutting for hay depending on rate varies from seven to 90 days. Refer to the label for additional information.
For more information see NDSU Extension Circular W-802 at http://www.ext.nodak.edu/extpubs/plantsci/weeds/w802w.htm
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