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Phytotoxicity of Methazole to Prickly Sida and Cotton

Published online by Cambridge University Press:  12 June 2017

E. R. Butts  and
C. L. Foy
E. R. Butts
Affiliation:
Dep. of Plant Pathol. and Physiol., Virginia Polytech. Inst. and State Univ., Blacksburg, VA 24061
C. L. Foy
Affiliation:
Dep. of Plant Pathol. and Physiol., Virginia Polytech. Inst. and State Univ., Blacksburg, VA 24061
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Abstract

The differential tolerance of prickly sida (Sida spinosa L.) and cotton (Gossypium hirsutum L.) to methazole [2-(3,4-dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dione]was studied under greenhouse conditions. Methazole at dosages up to 8.96 kg/ha did not affect emergence of either species. Applications via nutrient solution, as well as preemergence and postemergence (over-the-top) treatments were phytotoxic to both species, becoming more pronounced with increasing concentration and time. However, a margin of selectivity between species occurred at dosages from 0.56 to 3.36 kg/ha preemergence. Directed sprays of methazole were not injurious to cotton. Selectivity would be influenced by plant size and method of application as well as biochemical differences between species.

Type
Research Article
Information
Weed Science , Volume 22 , Issue 5 , September 1974 , pp. 409 - 414
Copyright
Copyright © 1974 by the Weed Science Society of America 

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References

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