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Response of Cotton (Gossypium hirsutum) to Dicamba

Published online by Cambridge University Press:  12 June 2017

K. C. Hamilton
Affiliation:
Arizona Agric. Exp. Stn., Tucson, AZ 85721
H. F. Arle
Affiliation:
Arizona Agric. Exp. Stn., Phoenix, AZ 85040

Abstract

Single over-the-top and directed applications of dicamba (3,6-dichloro-o-anisic acid) were made to cotton (Gossypium hirsutum L. ‘Deltapine 16′). Dicamba applied over-the-top of cotton caused foliage malformation for about 6 weeks. Dicamba (32 g/ha) applied to cotton foliage 3 to 15 weeks after emergence reduced average cotton yields. Applications of 16 to 64 g/ha of dicamba over-the-top of cotton before bloom had less effect on cotton foliage, yield, boll components, and fiber properties than application at bloom. Directed applications of dicamba to the soil or to the base of cotton and soil caused foliage malformation but did not affect cotton yield, boll components, and fiber properties.

Type
Research Article
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

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