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1 October 2005 Efficacy of Reduced Sulfentrazone Rates Applied Preemergence with Metribuzin in Potato (Solanum tuberosum)
PAMELA J. S. HUTCHINSON, DANIEL M. HANCOCK, BRENT R. BEUTLER
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Abstract

Field trials were conducted with sulfentrazone at 53, 80, and 105 g ai/ha combined with 0, 420, and 560 g ai/ha metribuzin in a 3 by 3 factorial arrangement. Sulfentrazone and metribuzin combinations improved control of redroot pigweed, common lambsquarters, hairy nightshade, and volunteer oat compared with sulfentrazone applied alone. Kochia control was more than 90% regardless of metribuzin presence in the treatment. Sulfentrazone at 105 g/ha was needed for greater than 90% hairy nightshade control. Sulfentrazone alone or in combination with metribuzin did not provide greater than 89% volunteer oat control. Potato crop injury was less than 5% and total tuber yields increased as metribuzin rate increased from 0 to 560 g/ha, reflecting improved weed control as metribuzin rate increased.

Nomenclature: Metribuzin; sulfentrazone; potato, Solanum tuberosum L. ‘Russet Burbank’; common lambsquarters, Chenopodium album L. #3CHEAL; hairy nightshade, Solanum sarrachoides Sendter # SOLSA; kochia, Kochia scoparia L. Shrad. # KCHSC; redroot pigweed, Amaranthus retroflexus L. # AMARE; volunteer oats, Avena sativa L. # AVESA.

Additional index words: Crop safety, herbicide injury, reduced rates.

Abbreviations: OM, organic matter; WAT, weeks after treatment.

PAMELA J. S. HUTCHINSON, DANIEL M. HANCOCK, and BRENT R. BEUTLER "Efficacy of Reduced Sulfentrazone Rates Applied Preemergence with Metribuzin in Potato (Solanum tuberosum)," Weed Technology 19(4), 954-958, (1 October 2005). https://doi.org/10.1614/WT-04-301R.1
Published: 1 October 2005
JOURNAL ARTICLE
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