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Variability for Response to Herbicides in Wild Oat (Avena fatua) Populations

Published online by Cambridge University Press:  12 June 2017

Kiet M. Thai ,
Sakti Jana  and
James M. Naylor
Kiet M. Thai
Affiliation:
Crop Sci. and Plant Ecology Dep.
Sakti Jana
Affiliation:
Crop Sci. and Plant Ecology Dep.
James M. Naylor
Affiliation:
Dep. Biol. (deceased September 5, 1984), Univ. of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0
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Abstract

Reaction of some wild oat (Avena fatua L. ♯4 AVEFA) populations to the herbicide triallate [S-(2,3,3-trichloroallyl)diisopropylthiocarbamate] was investigated in a controlled-environment chamber. Under specified conditions, 1.0 mg active ingredient of triallate incorporated in 1 kg of soil was a satisfactory diagnostic rate for 14-day-old seedlings. Five seedling growth parameters were studied. These parameters were emergence, survival to produce first leaf, mesocotyl length, first-leaf length, and seedling height. Of these, mesocotyl length was least affected by triallate treatment, and significant differences in variability for triallate reaction were found within and among historically triallate unexposed, as well as exposed populations. Within-population variation for seedling emergence and survival was higher in unexposed than in exposed populations. Populations with recurrent exposure to triallate were more tolerant to the herbicide under experimental conditions than historically unexposed populations. Triallate-tolerant lines were identified which were tolerant to two other common wild oat herbicides.

Keywords

Herbicide tolerancecross tolerancetriallatediclofopAvena fatuaAVEFA

Information

Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 33 , Issue 6 , November 1985 , pp. 829 - 835
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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