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Response of Quackgrass (Elytrigia repens) Biotypes to Primisulfuron

Published online by Cambridge University Press:  12 June 2017

Greg R. Gillespie  and
David B. Vitolo
Greg R. Gillespie
Affiliation:
Ciba-Geigy Corp., 7145 58th Ave., Vero Beach, FL 32967
David B. Vitolo
Affiliation:
Ciba-Geigy Corp., R. D. 2, Box 92, Hudson, NY 12534
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Abstract

Quackgrass biotypes collected from 15 locations exhibited differential response to primisulfuron at 20 g ha−1 in field experiments at Hudson, NY during 1990 and 1991. Quackgrass control ranged from 23 to 100% 77 days after application (DAA) in 1990 and from 38 to 100% 88 DAA in 1991. The biotype from Montpelier, OH was the most tolerant both years. Differential response of quackgrass biotypes from five locations was confirmed in greenhouse experiments. The primisulfuron rate required to reduce shoot regrowth by 50% in the greenhouse was estimated at 15, 15, 17, 17, and 37 g ha−1 for biotypes from Amherst, MA; Mahnomen MN; Fargo, ND; State College, PA; and Montpelier, OH, respectively. Quackgrass shoot regrowth was reduced more when primisulfuron was applied with the linear alcohol ethoxylate additive 1412-70 compared with Scoil, Sylgard 309, Agridex, or X-77.

Keywords

Primisulfuron, 2-[[[[[4,6-bis(difluoromethoxy)-2-pyrimidinyl]amino]carbonyl]amino]sulfonyl]benzoic acidquackgrass, Elytrigia repens (L.) Nevski # AGRREAdditivequackgrass controlZea maysAGRRE
Type
Research
Information
Weed Technology , Volume 7 , Issue 2 , June 1993 , pp. 411 - 416
Copyright
Copyright © 1993 Weed Science Society of America 

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