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Effect of Trifluralin Soil Metabolites on Soybean (Glycine max) Growth and Yield

Published online by Cambridge University Press:  12 June 2017

William C. Koskinen ,
James E. Oliver ,
Chester G. McWhorter  and
Philip C. Kearney
William C. Koskinen
Affiliation:
Agric Res. Serv., U.S. Dep. Agric., Southern Weed Sci. Lab., Stoneville, MS 38776
James E. Oliver
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Pesticide Degradation Lab., Beltsville, MD 20705
Chester G. McWhorter
Affiliation:
Agric Res. Serv., U.S. Dep. Agric., Southern Weed Sci. Lab., Stoneville, MS 38776
Philip C. Kearney
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., Pesticide Degradation Lab., Beltsville, MD 20705
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Abstract

The effects of twelve soil metabolites of trifluralin [2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenamine] on soybean [Glycine max (L.) Merr.] growth, yield, and seed oil and protein content were determined. The metabolites included oxidative dealkylated, reduced nitro group, benzimidazole, azoxy, azo, oxidized, and hydroxylated derivatives of trifluralin. When applied at 0.22 kg ai/ha and incorporated 7.5 cm deep, no individual metabolite had a significant adverse effect on growth or yield. Three of the metabolites significantly decreased seed oil content and two of the metabolites significantly increased seed protein content. These effects are not considered important in that the differences, while statistically significant, are very small. Also, the amounts of metabolites applied greatly exceeded those expected to be found after many years of continuous use of trifluralin. Potential accumulation of individual metabolites from long-term use of trifluralin does not appear to adversely affect soybean growth, yield, or quality.

Keywords

Herbicide degradationphytotoxicityoil contentprotein content
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 34 , Issue 3 , May 1986 , pp. 471 - 473
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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