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Interactions between Herbicidal Carbamates and Growth Regulators

Published online by Cambridge University Press:  12 June 2017

C. S. James ,
G. N. Prendeville ,
G. F. Warren  and
M. M. Schreiber
C. S. James
Affiliation:
Department of Horticulture, U.S. Dep. of Agr., Purdue University, Lafayette, Indiana
G. N. Prendeville
Affiliation:
Department of Botany and Plant Pathology, U.S. Dep. of Agr., Purdue University, Lafayette, Indiana
G. F. Warren
Affiliation:
Crops Research Division, Agr. Res. Serv., U.S. Dep. of Agr., Purdue University, Lafayette, Indiana
M. M. Schreiber
Affiliation:
Crops Research Division, Agr. Res. Serv., U.S. Dep. of Agr., Purdue University, Lafayette, Indiana
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Abstract

Interactions between carbamate and growth regulator herbicides were antagonistic both in whole plants and in plant segments. When combinations of isopropyl m-chlorocarbanilate (chlorpropham) and (2,4-dichlorophenoxy)acetic acid (2,4-D) were applied to the foliage of either redroot pigweed (Amaranthus retroflexus L.) or pale smartweed (Polygonum lapathifolium L.), the severe twisting effects of 2,4-D were greatly reduced. This interaction did not involve differential movement or metabolism of either herbicide. The induced elongation of soybean hypocotyl sections by the three growth regulators 2,4-D, 3,6-dichloro-o-anisic acid (dicamba), and 4-amino-3,5,6-trichloropicolinic acid (picloram) was inhibited in the presence of either chlorpropham or S-ethyl dipropylthiocarbamate (EPTC). Similarly, curvature tests using soybean (Glycine max (L.) Merr.) hypocotyl sections showed the curvature induced by the growth regulators to be almost completely eliminated by the presence of the carbamates.

Type
Research Article
Information
Weed Science , Volume 18 , Issue 1 , January 1970 , pp. 137 - 139
Copyright
Copyright © 1970 Weed Science Society of America 

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References

Literature Cited

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