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Selectivity of Dicamba in Wheat and Wild Buckwheat

Published online by Cambridge University Press:  12 June 2017

P. C. Quimby Jr.  and
John D. Nalewaja
P. C. Quimby Jr.
Affiliation:
Plant Sci. Res. Div., Agr. Res. Serv., U.S. Dep. of Agr., Los Lunas, New Mexico 87031
John D. Nalewaja
Affiliation:
North Dakota State University, Fargo, North Dakota 58103
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Abstract

The uptake, translocation, and fate of 14C-labeled 3,6-dichloro-o-anisic acid (14C-dicamba) were studied in wheat (Triticum aestivum L., 'Selkirk’) and wild buckwheat (Polygonum convolvulus L.) as resistant and susceptible species, respectively. Selectivity could not be explained by interspecific differences in uptake of 14C-dicamba by leaf sections submerged in exogenous solutions. 14C-dicamba accumulated in meristems of wild buckwheat but not in the youngest tillers of wheat. Moreover, wheat main culms conjugated or metabolized 14C-dicamba more quickly than did wild buckwheat meristems. Therefore, selectivity of dicamba apparently was related to interspecific differences in translocation and metabolism.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 5 , September 1971 , pp. 598 - 601
Copyright
Copyright © Weed Science Society of America 

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References

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