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Chlorflurenol Effects on Absorption and Translocation of Dicamba in Canada Thistle (Cirsium arvense)

Published online by Cambridge University Press:  12 June 2017

M. R. Baradari ,
L. C. Haderlie  and
R. G. Wilson
M. R. Baradari
Affiliation:
Dep. Agron., Univ. of Nebraska, Lincoln, NE 68583
L. C. Haderlie
Affiliation:
Dep. Agron., Univ. of Nebraska, Lincoln, NE 68583
R. G. Wilson
Affiliation:
Dep. Agron., Univ. of Nebraska, Lincoln, NE 68583
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Abstract

Absorption and translocation of the growth regulator 14C-chlorflurenol (methyl-2-chloro-9-hydroxyfluorene-9-carboxylate) and of the herbicide 14C-dicamba (3,6-dichloro-o-anisic acid) were studied in Canada thistle [Cirsium arvense (L.) Scop.]. Also investigated was how foliar treatments with chlorflurenol affected leaf uptake and distribution of dicamba by Canada thistle. Plants were grown in aerated nutrient solution. 14C-chlorflurenol showed strong acropetal and weak basipetal movement. Thirty-two percent of the foliar applied 14C-dicamba was absorbed and most of the radioactivity tended to accumulate in the young growing leaves. Only 0.6% of the applied radioactivity moved to the roots. Leaf absorption and basipetal translocation of 14C-dicamba were increased two- and ten-fold, respectively, by the simultaneous addition of chlorflurenol at 0.6 kg/ha. Root bud activity was increased when 4-week-old Canada thistle plants were foliarly treated with chlorflurenol at 0.6 kg/ha. Field work demonstrated that Canada thistle control could be enhanced by chlorflurenol addition to dicamba.

Keywords

Herbicidegrowth regulatorbud dormancy
Type
Research Article
Information
Weed Science , Volume 28 , Issue 2 , March 1980 , pp. 197 - 200
Copyright
Copyright © 1980 by the Weed Science Society of America 

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References

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