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Absorption, Translocation, and Metabolism of Bentazon in Sunflower (Helianthus annum)

Published online by Cambridge University Press:  12 June 2017

S. M. Irons  and
O. C. Burnside
S. M. Irons
Affiliation:
Univ. of Nebraska, presently with Monsanto Agric. Prod. Co., St. Louis, MO 63166
O. C. Burnside
Affiliation:
Dep. Agron., Univ. of Nebraska, Lincoln, NE 68583
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Abstract

Addition of a surfactant (alkylaryl polyglycol ether) increased the rate and quantity of 14C-bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] absorbed by leaves of 3-week-old hydroponically grown sunflower (Helianthus annuus L.). Autoradiographs and radioassays of plant parts indicated that the surfactant enhanced acropetal movement of bentazon in sunflower, whereas bentazon applied alone remained in the treated leaves. Basipetal movement of 14C-bentazon was insignificant in sunflower. High-pressure liquid chromatography showed that 3 days after treatment 40% of the absorbed 14C-bentazon was metabolized to a methanol-soluble metabolite. Thinlayer chromatography substantiated the occurrence of a 14C-bentazon metabolite 3 days after treatment.

Keywords

Autoradiograph14C-labeled herbicidechromatographysurfactant
Type
Research Article
Information
Weed Science , Volume 30 , Issue 3 , May 1982 , pp. 255 - 259
Copyright
Copyright © 1982 by the Weed Science Society of America 

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References

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