Title: Consecutive Annual Applications of Alachlor and Metolachlor to Continuous No-Till Corn (<i>Zea mays</i>)
Abstract: Consecutive annual applications of alachlor [2-chloro- N -(2,6-diethylphenyl)- N -(methoxymethyl)acetamide] and metolachlor [2-chloro- N -(2-ethyl-6-methylphenyl)- N -(2-methoxy-1-methylethyl)acetamide] were made to continuous no-till corn ( Zea mays L. ‘Pioneer 3184’ in 1982 and 1983, ‘Pioneer 3744’ in 1984, and ‘Pioneer 3378’ in 1985 to 1987). In a 5-yr study, control of the dominant annual grass species, large crabgrass [ Digitaria sanguinalis (L.) Scop. # DIGSA], by alachlor declined to less than 50% by the fifth year. Control of large crabgrass by metolachlor remained greater than 80% throughout the study but metolachlor allowed the establishment of a greater fall panicum ( Panicum dichotomiflorum Michx. # PANDI) population in this and an additional 3-yr study than in chloroacetamide-free checks. In the 3-yr study in which giant foxtail ( Setaria faberi Herrm. # SETFA) was dominant, annual applications of metolachlor and a microencapsulated formulation of alachlor provided better control in the second year than the emulsifiable concentrate formulation of alachlor, but formulation differences diminished in the third year.
Publication Year: 1988
Publication Date: 1988-05-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 16
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