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Performance of BAS 9052 Applied to Johnsongrass (Sorghum halepense) and Soybeans (Glycine max)

Published online by Cambridge University Press:  12 June 2017

E. James Retzinger Jr. ,
R. Larry Rogers  and
Ronald P. Mowers
E. James Retzinger Jr.
Affiliation:
N.E. Res. Stn., P.O. Box 438, St. Joseph, LA 71366
R. Larry Rogers
Affiliation:
N.E. Res. Stn., P.O. Box 438, St. Joseph, LA 71366
Ronald P. Mowers
Affiliation:
Exp. Stn., Dep., LSU, Baton Rouge, LA 70803
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Abstract

The performance of BAS 9052 {2-[1-(ethoxyimino)-butyl]-5-[2-(ethylthio)-propyl]-3-hydroxy-2-cyclohexen-1-one} was evaluated when applied postemergence to rhizome and seedling johnsongrass [Sorghum halepense (L.) Pers. # SORHA] in soybeans [Glycine max (L.) Merr. ‘Bragg’ and ‘Centennial’] when the soybeans had four or five trifoliate leaves (V3 to V4 stages) or when they had six to eight trifoliate leaves (V5 to V7 growth stages). The degree of weed control was more strongly associated with rainfall conditions than with the size of the johnsongrass. An exponential equation was used to describe the relationship of soybean seed yield to BAS 9052 rate. BAS 9052 applications of 0.28 kg ai/ha provided an estimated 98% of the potential soybean yield increase when rainfall was adequate but, 0.41 kg ai/ha was required when the plants were grown under moisture stress. Soybean yields were increased by 260 kg/ha when BAS 9052 was applied at the V3 to V4 compared to the V5 to V7 growth stage.

Keywords

Stage of applicationenvironmental influenceSORHA
Type
Research Article
Information
Weed Science , Volume 31 , Issue 6 , November 1983 , pp. 796 - 800
Copyright
Copyright © 1983 Weed Science Society of America 

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References

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