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Propanil Selectivity for Green Foxtail (Setaria viridis) in Wheat (Triticum aestivum)

Published online by Cambridge University Press:  12 June 2017

Charlotte V. Eberlein  and
Richard Behrens
Charlotte V. Eberlein
Affiliation:
Dep. of Agron. and Plant Genetics, Univ. of Minnesota, St. Paul, MN 55108
Richard Behrens
Affiliation:
Dep. of Agron. and Plant Genetics, Univ. of Minnesota, St. Paul, MN 55108
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Abstract

Retention, absorption, translocation, and metabolism of propanil (3′,4′-dichloropropionanilide) in tolerant wheat (Triticum aestivum L. ‘Era’) and susceptible green foxtail [Setaria viridis (L.) Beauv. ♯3 SETVI] were studied to determine the basis of selectivity. Green foxtail retained 7.7 times more spray on a mg/g fresh weight basis than did wheat. Absorption of 14C-propanil by green foxtail was greater than by wheat during most of the 48-h uptake period, but differences in absorption were not large enough for absorption to be a major selectivity factor. Translocation of foliar-applied 14C-propanil was limited in both species; after 48 h, 96.7% of absorbed 14C remained in the treated wheat leaf and 99.7% remained in the treated green foxtail leaf. Limited metabolism of 14C-propanil occurred in green foxtail, with only 6.4% of extractable 14C-propanil metabolized to dichlorolactanilide and unknown 14C-compounds during a 72-h period. Wheat metabolized 65.8% of the extractable 14C-propanil to dichloroaniline and unknown 14C compounds by 72 h after treatment. The results of this research indicate that spray retention and propanil metabolism are the major factors involved in wheat tolerance and green foxtail susceptibility to propanil.

Keywords

Spray retentionabsorptiontranslocationmetabolismSETVI
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 32 , Issue 1 , January 1984 , pp. 13 - 16
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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