Home > Weed Control in Field Crops > Weed Control - Small Grains > Small grains - fall-seeded barley, oats, and wheat

Small grains - fall-seeded barley, oats, and wheat

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Weed Problem Chemical rate per acre Product per acre Treatment Time Remarks
Many annual broadleaf weeds including chamomile/mayweed, common chickweed (suppression), curly dock, knawel, mustard spp, wild garlic, and several other species Thifensulfuron 0.014-0.028 lb Harmony SG 0.45-0.9 oz Postemergence For best results, apply in water with 0.25 to 0.5 percent v/v nonionic surfactant. Consult label for more information about certain hard-to-control species, including wild garlic, wild radish, and others. May be tank-mixed with 2,4-D, Banvel/Clarity, Buctril, and several others including several grain herbicides registered for wheat. Harmony SG may be mixed with several insecticides or fungicides but do not mix with Malathion. Refer to label for mixing instructions with respect to use of nitrogen fertilizer carriers or surfactants. Plant wheat, barley, oat, triticale,soybean, and field corn anytime after Harmony SG application. Plant any other crop 45 days after Harmony SG application. For wheat and barley, make applications after the crop is in the 2-leaf stage, but before the flag leaf is visible. Apply after 3-leaf-stage on spring oats but before jointing. With spring oats, limit your Harmony SG application to 0.45 to 0.6 ounces per acre. Do not make more than one application of Harmony SG per crop season on oats. Do not graze or feed forage or hay from treated areas to livestock. Harvested straw may be used for bedding and/or feed.
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College of Agriculture and Natural Resources
University of Maryland

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