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Differences in the Phytotoxic Response of Wild Oats (Avena fatua) to Triallate and Trifluralin

Published online by Cambridge University Press:  12 June 2017

D. Billett  and
R. Ashford
D. Billett
Affiliation:
Crop Sci. Dep., Univ. Saskatchewan, Saskatoon, Saskatchewan, S7N 0W0, Canada
R. Ashford
Affiliation:
Crop Sci. Dep., Univ. Saskatchewan, Saskatoon, Saskatchewan, S7N 0W0, Canada
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Abstract

Several differences between the mode of action of trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) and triallate [S-(2,3,3-trichloroallyl)diisopropylthiocarbamate] were observed on wild oats (Avena fatua L.) in growth chamber experiments. Trifluralin exhibited little or no postemergence effect when applied to the soil surface. Surface applications of triallate interfered with deposition of epicuticular wax on leaf surfaces, and caused necrotic lesions, leaf break, and the abortion of the first leaf through the coleoptile. Trifuralin, but not triallate, incorporated in the soil reduced extension of the wild oat coleoptile. Soil-incorporated treatments involving trifluralin induced more extensive swelling of the mesocotyl, coleoptile node, and and coleoptile than triallate applied similarly. Triallate appeared to exert its major effect on cell elongation of the wild oat foliar material enclosed in the coleoptile. Trifluralin caused its greatest phytotoxic effect on the meristematic tissue at the region of the coleoptile node.

Type
Research Article
Information
Weed Science , Volume 26 , Issue 3 , May 1978 , pp. 273 - 276
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

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