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Postemergence Chloroxuron Treatments on Soybeans

Published online by Cambridge University Press:  12 June 2017

Robert N. Andersen
Robert N. Andersen*
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, Minnesota
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Abstract

Postemergence treatments with 3-[p-(p-chlorophenoxy)phenyl]-1,1-dimethylurea [chloroxuron], for broadleaf weed control in soybeans [Glycine max (L.) Merr.] often partially defoliate, and temporarily stunt the crop. Chloroxuron was applied at 3 lb/A and at 1, 1½, and 3 lb/A with surfactant over the tops of weed-free soybeans in the cotyledon, unifoliate, and first trifoliolate stages of growth in 1967, 1968, and 1969. Relatively small but statistically significant yield reductions, particularly from treatments in the unifoliate stage, resulted in 1967. No significant yield reductions resulted in 1968 or 1969. These studies demonstrated the ability of soybeans to withstand initial injury from early postemergence treatments with chloroxuron without serious reductions in yield.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 3 , May 1971 , pp. 219 - 222
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

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