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Crop Response to Fallow Applications of Atrazine and Clomazone

Published online by Cambridge University Press:  12 June 2017

Drew J. Lyon
Affiliation:
Univ. Nebraska, Scottsbluff, NE 69361
Randy L. Anderson
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Akron, CO 80720

Abstract

The response of oat, foxtail millet, proso millet, and sunflower to atrazine and clomazone applied the previous fall was investigated two years in field studies near Akron, CO and Sidney, NE. Foxtail millet biomass, and proso millet and sunflower grain yields were not reduced when these crops were seeded into soil that had been treated the previous fall with atrazine and/or clomazone at rates of 0.6 or 1.1 kg ai/ha. Forage yield of oat was reduced 11 to 18% by some treatments, but this effect was not consistent over years or sites. Treatments containing 1.1 kg/ha of atrazine provided 1 to 5 wk of residual weed control in foxtail millet, proso millet, and sunflower. The study indicated that producers have flexibility in crop selection when using atrazine and clomazone in reduced- and no-till production systems.

Type
Research
Copyright
Copyright © 1994 by the Weed Science Society of America 

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