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Herbicide Effects on Soybean [Glycine max (L.) Merrill] Seed Lipids¹

Herbicide effects on soybean [Glycine max (L.) Merrill] seed oil content and fatty acid composition as related to yield and injury were determined for 27 herbicide treatments involving 13 herbicides on the soybean cultivars, ‘Chippewa’ and ‘Harosoy.’ Although the two cultivars differed in fatty acid composition and yield, there were no significant differences in their response to herbicide treatments. None of the treatments significantly altered the percentage oil content in the seed. However, small but significant changes in fatty acid composition, yield, and injury were observed. Increases in the percent stearic acid content were correlated with decreases in the percent linoleic acid content. Considering all treatments, there was no general correlation of changes in fatty acid composition with yield or injury.

Key Words: Oil content • Fatty acid composition • Herbicide combinations • Stearic acid • Linoleic acid

² Assistant Professor and Professor, respectively; Department of Crop and Soil Sciences, Michigan State University, East Lansing, Mich. 48823.

Received for publication February 27, 1970.