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Effect of Winter Wheat (Triticum aestivum) Straw Mulch Level on Weed Control

Published online by Cambridge University Press:  12 June 2017

Donald A. Crutchfield ,
Gail A. Wicks  and
Orvin C. Burnside
Donald A. Crutchfield
Affiliation:
Dep. Agron., Univ. Nebraska, Lincoln, NE 68583
Gail A. Wicks
Affiliation:
Univ. Nebraska, West Central Res. and Ext. Ctr., North Platte, NE 69101
Orvin C. Burnside
Affiliation:
Univ. Nebraska, West Central Res. and Ext. Ctr., North Platte, NE 69101
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Abstract

Research was conducted to determine the effect of winter wheat (Triticum aestivum L.) straw mulch level on weed control in a winter wheat-ecofallow corn (Zea mays L.)-fallow rotation at North Platte and Sidney, NE, in 1981 and 1982. Wheat straw mulch was established at 0, 1.7, 3.4, 5.1, and 6.8 Mg/ha in stubble fields. After application of 1.5 times the recommended rate at corn planting, metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide] concentration remained higher in unmulched soil than in mulched soil for more than 4 months, due to interception of metolachlor by the mulch. Even though the amount of metolachlor in the soil was reduced by mulch, weed control was not reduced and increased with increasing mulch level. Thus, increasing metolachlor rate was not necessary to maintain adequate weed control in no-till winter wheat stubble since mulch itself provided some measure of weed control.

Keywords

Conservation tillageecofarmingno-tillmetolachlorZea mays L.
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 34 , Issue 1 , January 1986 , pp. 110 - 114
Copyright
Copyright © 1986 by the Weed Science Society of America 

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