Accent labeled for sweet corn

Editor’s note: This article is from the archives of the MSU Crop Advisory Team Alerts. Check the label of any pesticide referenced to ensure your use is included.

The label for the herbicide Accent has been expanded to include sweet corn grown for processing and fresh market.

Accent may be applied postemergence to sweet corn for control of annual grasses and some broadleaves. It will control most annual grasses up to about 4 inches in height. It also gives some control of dandelion, jimsonweed, morningglory, pigweeds and smartweeds. Accent may be applied as a broadcast treatment until corn has 5 leaf-collars or is 12 inches tall. It may be applied to sweet corn 12 to 18 inches tall with drop nozzles.

Always include a surfactant with Accent. Use crop oil concentrate (COC) at 1%, methylated seed oil (MSO) at 0.5%, or nonionic surfactant (NIS) at 0.25%, by volume. (Eg., 0.25% is 1 qt in 100 gallons, or 8 fl oz in 25 gallons of water.) Also, include an ammonium nitrogen fertilizer, either 2 quarts/acre of 28% UAN, or 2 lb/acre of spray-grade ammonium sulfate.

The normal use rate of Accent is 1/3 to 2/3 oz product (0.015-0.031 lb ai) per acre. Up to 1 1/3 oz/acre (0.062 lb ai) may be applied to kill large weeds. Some sweet corn hybrids may be sensitive to Accent, and growers should use lower rates until they have some experience with it. Pesticide applicators should have a gram scale or balance available for measuring these very small amounts of pesticide. One ounce is 28.35 grams.

Accent is a sulfonylurea herbicide. Chemicals in that chemical family tend to have long residual lives in the soil and carryover is a potential problem. Accent may injure sugar beets or potatoes grown after sweet corn on soils with pH above 6.5. Most other vegetable crops appear to have sufficient tolerance to follow Accent application the next year.

See the label for more specific information on use of Accent on sweet corn. Labels should be available from dealers or DuPont representatives.

Dr. Zandstra’s work is funded in part by MSU‘s AgBioResearch.

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