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Control of Kochia in Sugarbeets With Benzadox

Published online by Cambridge University Press:  12 June 2017

D. M. Weatherspoon  and
E. E. Schweizer
D. M. Weatherspoon
Affiliation:
Colorado State University, Agr. Res. Serv., U. S. Dep. of Agr. in cooperation with the Botany and Plant Pathology Department, Colorado State University, Fort Collins, Colorado
E. E. Schweizer
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr. in cooperation with the Botany and Plant Pathology Department, Colorado State University, Fort Collins, Colorado
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Abstract

Benzadox [(benzamidooxy)acetic acid] applied at 1, 2, 3, and 4 lb/A as a postemergence treatment controlled kochia [Kochia scoparia (L.) Schrad.] selectively in sugarbeets (Beta vulgaris L.). Control increased as the rate of benzadox increased, but some kochia survived at the 4-lb/A rate. Competition from these plants reduced the yields of sugarbeet roots and sucrose. Where surviving kochia plants were removed by hand 7 weeks after emergence, all sugarbeets treated with benzadox yielded as well as the hand-weeded checks. In growth chamber studies, the activity of benzadox was increased by temperature and decreased by simulated rain which occurred within 4 hr following application. Under a temperature regime of 70 F day and 40 F night, if simulated rain was delayed for 8 hr, the control of kochia was identical to that obtained where no simulated rain followed treatment. The growth chamber studies confirmed our results with the performance of benzadox under different environmental conditions in the field.

Type
Research Article
Information
Weed Science , Volume 18 , Issue 1 , January 1970 , pp. 183 - 185
Copyright
Copyright © 1970 Weed Science Society of America 

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References

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