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Control of Russian Thistle (Salsola iberica) with Chlorsulfuron in a Wheat (Triticum aestivum) Summer-Fallow Rotation

Published online by Cambridge University Press:  12 June 2017

Frank L. Young  and
David R. Gealy
Frank L. Young
Affiliation:
U.S. Dep. Agric. Agric. Res. Serv., 215 Johnson Hall, Washington State Univ., Pullman, WA 99164
David R. Gealy
Affiliation:
U.S. Dep. Agric. Agric. Res. Serv., 215 Johnson Hall, Washington State Univ., Pullman, WA 99164
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Abstract

Greenhouse and field experiments were conducted to evaluate the efficacy of chlorsulfuron {2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino] carbonyl] benzenesulfonamide} on Russian thistle (Salsola iberica Sennen and Pau # SASKR) in a spring wheat (Triticum aestivum L.) summer-fallow rotation. In the greenhouse, when chlorsulfuron was applied to Russian thistle at three stages of growth, shoot dry weight was reduced similarly with either 4.4 g ai/ha plus surfactant or 140 g ai/ha plus surfactant. In the field, postharvest control (1981) of Russian thistle with 17.5 to 140 g/ha of chlorsulfuron ranged from 35 to 60% without surfactant and from 76 to 93% with surfactant. During the summer-fallow year (1982), Russian thistle treated in the preflowering stage of growth was not effectively controlled with 17.5 or 35 g/ha. In contrast, residual control from postharvest treatments 1 yr after application ranged from 90 to 100%. Chlorsulfuron applied in the crop (1983) controlled Russian thistle throughout the growing season. All treatments of chlorsulfuron applied in 1981, 1982, and 1983 increased wheat yield at least 75%.

Keywords

Conservation tillagepostharvest controlresidual controlSASKR
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 34 , Issue 2 , March 1986 , pp. 318 - 324
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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