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Preemergence Herbicides Incorporated in Moist Soils for Control of Annual Grass in Irrigated Cotton

Published online by Cambridge University Press:  12 June 2017

H. M. Kempen ,
J. H. Miller  and
L. M. Carter
H. M. Kempen
Affiliation:
Department of Botany, University of California, Davis
J. H. Miller
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture
L. M. Carter
Affiliation:
Agricultural Engineering Research Division, Agricultural Research Service, U. S. Department of Agriculture
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Abstract

Herbicide performance was markedly altered by soil incorporation, depth of incorporation, crop seed placement, soil type, and rainfall. Of the 25 herbicides studied, 2-chloro-N,N-diallylacetamide (CDAA) and isopropyl-N-(3-chlorophenyl)carbamate (CIPC) and mixtures of them showed most promise. Herbicide-placement studies showed that the selectivity of these herbicides in cotton largely depends on herbicide placement in relation to the crop seed and on rainfall. Without rainfall, CDAA incorporated in moist soil above the cotton seed provided excellent weed control with minimal injury to cotton. CDAA was readily leached from the zone of germinating weed seed by rain or irrigation on coarse-textured soils. Without rainfall, CIPC was slightly inferior to CDAA in weed control but more stable in performance over a wider range of environmental conditions. Mixtures of CDAA and CIPC were somewhat superior to either alone. Commercial usage of these herbicides in moist soil depends on the development of suitable equipment for application.

Type
Research Article
Information
Weeds , Volume 11 , Issue 4 , October 1963 , pp. 300 - 307
Copyright
Copyright © 1963 Weed Science Society of America 

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References

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