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Weed-Control Evaluations in Ratoon-Cropped Grain Sorghum (Sorghum bicolor)

Published online by Cambridge University Press:  12 June 2017

Philip A. Banks  and
Ronny R. Duncan
Philip A. Banks
Affiliation:
Agron. Dep., Univ. of Georgia, Coll. Stn., Athens, GA 30602
Ronny R. Duncan
Affiliation:
Agron. Dep., Univ. of Georgia, Georgia Stn., Griffin, GA 30212
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Abstract

Weed-control evaluations in ratoon-cropped grain sorghum [Sorghum bicolor (L.) Moench.] indicated that acceptable broadleaf weed control (>80%) in the second crop could be achieved by the use of a contact herbicide plus a residual herbicide applied after first harvest. Annual grasses, especially volunteer grain sorghum, were controlled in the second crop with metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide] plus propazine [2-chloro-4,6-bis(isopropylamino)-s-triazine] applied preemergence at planting and followed by metolachlor, cyanazine {2-[[4-chloro-6-(ethylamino)-s-triazin-2-yl] amino]-2-methylpropionitrile}, or pendimethalin [N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine] applied after first harvest. Second-crop grain yields were not adversely affected by any treatments, and it appeared that satisfactory weed control in the first crop lessened the need for a residual herbicide in the second crop.

Keywords

Double-croppingmetolachlorparaquats-triazinespendimethalin
Type
Research Article
Information
Weed Science , Volume 31 , Issue 2 , March 1983 , pp. 254 - 258
Copyright
Copyright © 1983 Weed Science Society of America 

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References

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