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Quackgrass (Elytrigia repens) Control in Corn (Zea mays) with Nicosulfuron and Primisulfuron

Published online by Cambridge University Press:  12 June 2017

Joseph A. Bruce and
James J. Kells
Joseph A. Bruce
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824
James J. Kells
Affiliation:
Department of Crop and Soil Sciences, Michigan State University, East Lansing, MI 48824
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Abstract

Quackgrass is a serious weed problem in the northern United States and southern Canada. Field experiments were conducted in 1990 and 1991 to examine the effect of herbicide rate, application timing, quackgrass growth stage, and cultivation on quackgrass control with nicosulfuron and primisulfuron in corn. Nicosulfuron (35 g ai/ha) and primisulfuron (40 g ai/ha) each provided 84% or greater control of two-leaf plants and 93% or greater control of four-leaf quackgrass plants. Sequential applications of both nicosulfuron and primisulfuron provided greater season-long control than single applications of the same rate on two-leaf but not four-leaf quackgrass. Cultivation 10 d after nicosulfuron or primisulfuron application often increased early-season control, but by corn harvest few differences were observed. Postemergence (POST) applications of nicosulfuron and primisulfuron provided at least 88% control, compared with 66 to 86% from an early preplant application of glyphosate. Corn yields were similar regardless of the quackgrass control program.

Keywords

Glyphosate, N-(phosphonomethyl)glycinenicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N,N-dimethyl-3-pyridinecarboxamideprimisulfuron, 2-[[[[[4,6-bis(difluoromethoxy)-2-pyrimidinyl]amino]carbonyl]amino]sulfonyl]benzoic acidquackgrass, Elytrigia repens (L.) Nevski # AGRREcorn, Zea mays L.Application timingcultivationgrowth stageintegrated controlsequential applicationCGA-136872DPX-V9360AGRRECult, cultivationEP, early postemergenceEPP, early preplantLP, late postemergencePOST, postemergencePRE, preemergence

Information

Type
Research
Information
Weed Technology , Volume 11 , Issue 2 , June 1997, pp. 373 - 378
Copyright
Copyright © 1997 by the Weed Science Society of America 

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