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Control of Green Foxtail in Wheat with Trifluralin

Published online by Cambridge University Press:  12 June 2017

A. Rahman  and
R. Ashford
A. Rahman
Affiliation:
Crop Sci. Dep., Univ. of Saskatchewan, Saskatoon, Saskatchewan, Canada
R. Ashford
Affiliation:
Crop Sci. Dep., Univ. of Saskatchewan, Saskatoon, Saskatchewan, Canada
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Abstract

Field experiments were conducted to study the competitive ability of green foxtail (Setaria viridis (L.) Beauv.) with wheat (Triticum aestivum L.) and the feasibility of using a,a,a-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine (trifluralin) for the selective control of green foxtail in wheat. Rates of 0.56 to 0.84 kg/ha of trifluralin gave 90 to 100% control of foxtail when growing in competition with wheat. Wheat tolerated rates of trifluralin up to 2.24 kg/ha, the maximum rate used, without injury or reduction in crop yield, when the herbicide was applied and incorporated to a shallow depth 1 day after seeding. A semidwarf and a tall variety of wheat were not affected by trifluralin treatments. Green foxtail had a relatively low competitive ability, and wheat plants suppressed foxtail to a marked degree under normal growing conditions. However, suppressed plants still produced sufficient seed to insure a dense infestation of foxtail plants in the succeeding year. Further, when wheat was grown under less competitive situations, green foxtail resulted in significant reductions in crop yield. It was concluded that green foxtail is an “opportunist-type” weed.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 1 , January 1972 , pp. 23 - 27
Copyright
Copyright © Weed Science Society of America 

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References

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