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Protection of Grain Sorghum (Sorghum bicolor) from Chloroacetanilide Herbicide Injury

  • Fred W. Roeth (a1), Orvin C. Burnside (a1) and Gail A. Wicks (a1)

Abstract

CGA-43089 [α-(cyanomethoximino)-benzacetonitrile] seed treatment was evaluated at three Nebraska locations during 1979 and 1980 for grain sorghum [Sorghum bicolor (L.) Moench] protection from injury by metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide], four other chloroacetanilide herbicides, and three metolachlor + s-triazine combinations. Acetochlor [2-chloro-N-(ethoxymethyl)-6′-ethyl-o-acetotoluidide] caused the most frequent and severest injury to unprotected and protected sorghum. Soilincorporated metolachlor produced more consistent injury than preemergence application to unprotected sorghum, but placement did not affect CGA-43089 protection. Sorghum-stand reduction was the type of injury most frequently encountered, but crop yield was least affected. CGA-43089 always protected the grain sorghum from yield reduction with these herbicides.

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References

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1. Burnside, O. C., Wicks, G. A., and Fenster, C. R. 1971. Protecting corn from herbicide injury by seed treatment. Weed Sci. 19:565568.
2. Ellis, J. F., Peek, J. W., Boehle, J. Jr., and Miller, G. 1980. Effectiveness of a new safener for protecting sorghum (Sorghum bicolor) from metolachlor injury. Weed Sci. 28:15.
3. Hoffman, O. L. 1962. Chemical seed protectants as herbicide antidotes. Weeds 10:322323.
4. Ketchersid, M. L., Norton, K., and Merkle, M. S. 1981. Influence of soil moisture on the safening effect of CGA-43089 in grain sorghum (Sorghum bicolor). Weed Sci. 29:281287.
5. Nyffeler, A., Gerber, H. R., and Hensley, J. R. 1980. Laboratory studies on the behavior of the herbicide safener CGA-43089. Weed Sci. 28:610.
6. Simkins, G. S., Moshier, L. J., and Russ, O. G. 1980. Influence of acetamide herbicide applications on efficacy of the protectant CGA-43089 in grain sorghum (Sorghum bicolor). Weed Sci. 28:646649.
7. Spotanski, R. F. and Burnside, O. C. 1973. Reducing herbicide injury to sorghum with crop protectants. Weed Sci. 21:531536.

Keywords

Protection of Grain Sorghum (Sorghum bicolor) from Chloroacetanilide Herbicide Injury

  • Fred W. Roeth (a1), Orvin C. Burnside (a1) and Gail A. Wicks (a1)

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