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Cinmethylin for Weed Control in Soybeans, Glycine max

Published online by Cambridge University Press:  12 June 2017

Prasanta C. Bhowmik
Prasanta C. Bhowmik*
Affiliation:
Dep. Plant and Soil Sci., Univ. Massachusetts, Amherst, MA 01003
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Abstract

A 3-yr study was conducted to evaluate efficacy and soybean tolerance of cinmethylin. Cinmethylin was applied preemergence alone at 0.6, 0.8, and 1.0 kg ai/ha or in combination with metribuzin at 0.3 kg/ha. These treatments did not injure soybeans in field trials in 1984, 1985, and 1986. The combination of cinmethylin at 0.7 kg/ha and metribuzin at 0.3 kg/ha controlled more than 90% of large crabgrass, fall panicum, and yellow foxtail. Redroot pigweed and common lambsquarters control was also excellent. Residual control of all grass species was excellent for 8 weeks after preemergence application, followed by reduced control in two of the three grasses. The combination of cinmethylin and metribuzin at 0.7 and 0.3 kg/ha, respectively, significantly increased soybean yields compared to those of untreated plots. These yields were comparable with those obtained from the combination of alachlor and metribuzin at 2.0 and 0.3 kg/ha, respectively. Cinmethylin treatments had no adverse effects on soybean yield components including pods/plant, seed/pod, and seed weight. Cinmethylin shows potential as a preemergence herbicide for full-season weed control in soybean production.

Keywords

Alachlor, 2-chloro-N-(2,6-diethylphenyl) - N - (methoxymethyl)acetamidecinmethylin, exo - 1 -methyl - 4 - (1 - methylethyl) - 2 - [(2 - methylphenyl)methoxy] -7-oxabicyclo[2.2-1]heptanemetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-onelarge crabgrass, Digitaria sanguinalis (L.) Scop. #3 DIGSAfall panicum, Panicum dichotomiflorum Michx. # PANDIyellow foxtail, Setaria lutescens (Weigil) Hubb. # SETLUredroot pigweed, Amaranthus retroflexus L. # AMARTEcommon lambsquarters, Chenopodium album L. #CHEALInjurycrop responsealachlormetribuzinChenopodium albumAmaranthus retroflexusDigitaria sanguinalisPanicum dichotomiflorumSetaria lutescensCHEALAMAREDIGSAPANDISETLU
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 36 , Issue 5 , September 1988 , pp. 678 - 682
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

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