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Cultural Practices Affecting Season-Long Weed Control in Irrigated Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Russell S. Moomaw  and
Alex R. Martin
Russell S. Moomaw
Affiliation:
Northeast Station, Univ. Nebraska, Concord, NE 68728
Alex R. Martin
Affiliation:
Dep. Agron., Univ. Nebraska, Lincoln, NE 68583
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Abstract

Season-long weed control has been a goal of some producers of irrigated corn (Zea mays L.) to reduce competition, lessen weed seed production, facilitate crop harvest, improve water efficiency (particularly with furrow irrigation), and improve aesthetic properties of fields. Field experiments were conducted for 3 yr on sprinkler-irrigated corn on a loamy fine sand. Five herbicides applied at layby generally provided season-long control of grass weeds and reduced weed seed production up to 100%. Pendimethalin [N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine] was particularly effective. Yields of irrigated corn were not increased by layby herbicide application. Use of corn rows spaced 91 cm apart and use of a shorter, early-maturing, horizontal-leaf corn cultivar resulted in greater weed growth and weed seed production than did use of 76-cm rows and a taller, full-season, upright-leaf corn cultivar. After nearly complete weed control with herbicides for 2 yr, withholding herbicide use in the third year allowed weed growth which reduced corn yield. Indications were that weed control efforts need to be continuous in irrigated corn production.

Keywords

Layby herbiciderow spacingcultivarpost directedlayby cultivation
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 32 , Issue 4 , July 1984 , pp. 460 - 467
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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