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Efficacy Comparisons of Alachlor and Metolachlor Formulations in the Field

Published online by Cambridge University Press:  12 June 2017

Henry P. Wilson
Affiliation:
Eastern Shore Agric. Exp. Stn., Painter, VA 23420
Thomas E. Hines
Affiliation:
Eastern Shore Agric. Exp. Stn., Painter, VA 23420
Kriton K. Hatzios
Affiliation:
Dep. Plant Path., Physiol., Weed Sci., VA Polytech. Inst. State Univ., Blacks-burg, VA 24061
J. Peyton Doub
Affiliation:
Dep. Plant Path., Physiol., Weed Sci., VA Polytech. Inst. State Univ., Blacks-burg, VA 24061

Abstract

In field studies conducted in 1984, 1985, and 1986, annual grass control by a microencapsulated (ME) formulation of alachlor [2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamide] generally was greater than that by the emulsifiable concentrate (EC) in no-till and was comparable to EC-alachlor in conventionally tilled corn (Zea mays L.) and soybeans [Glycine max (L.) Merr.]. In 1986, ME-metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide] controlled annual grass similar to EC-metolachlor. In greenhouse studies, shoot height and fresh weight of barnyardgrass [Echinochloa crus-galli (L.) Beauv. # ECHCG] sown in pots and treated with ME-alachlor was significantly greater than that treated with EC-alachlor. Soybean straw on the soil surface did not affect the differences between alachlor formulations in the greenhouse.

Type
Research
Copyright
Copyright © 1988 by the Weed Science Society of America 

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References

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