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Toxicity of DSMA to Johnsongrass

Published online by Cambridge University Press:  12 June 2017

C. G. McWhorter
C. G. McWhorter*
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Stoneville, Mississippi
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Abstract

Applications of disodium methanearsonate (DSMA) killed Johnsongrass foliage in field and greenhouse experiments. Control of regrowth following treatment increased with increasing rates, but there was no indication of translocation to rhizomes. DSMA toxicity did not change in 20 to 80 gpa water, but somewhat less control was obtained in 10 gpa. Addition of a surfactant to spray solutions increased toxicity. Control was not affected by stage of Johnsongrass growth, but observations indicated increased control during droughty conditions. Repeated usage provided seasonal Johnsongrass control equal to that obtained with sodium 2,2-dichloropropionate (dalapon), although more frequent applications were necessary.

Type
Research Article
Information
Weeds , Volume 14 , Issue 3 , July 1966 , pp. 191 - 194
Copyright
Copyright © 1966 Weed Science Society of America 

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References

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