Postemergence herbicide application timing effects on annual grass control and corn (Zea mays) grain yield

Giant foxtail, woolly cupgrass, and wild-prove millet infest millions of hectares of land devoted to corn production in the midwestern U.S. Control of these species and effects on corn grain yield were evaluated at various timings using POST applications of nicosulfuron vs. applications of various P...

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Bibliographic Details
Published inWeed science Vol. 45; no. 1; pp. 138 - 143
Main Authors Tapia, L.S, Bauman, T.T, Harvey, R.G, Kells, J.J, Kapusta, G, Loux, M.M, Lueschen, W.E, Owen, M.D.K, Hageman, L.H, Strachan, S.D
Format Journal Article
LanguageEnglish
Published 01.01.1997
Subjects
alachlor
application timing
chemical control
competitive ability
crop yield
crop-weed competition
Eriochloa villosa
grains
metolachlor
nicosulfuron
Panicum miliaceum
Setaria faberi
sulfonylurea herbicides
timing
weed control
Zea mays
Iowa
Indiana
Illinois
Minnesota
Ohio
Wisconsin
Michigan
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Summary:Giant foxtail, woolly cupgrass, and wild-prove millet infest millions of hectares of land devoted to corn production in the midwestern U.S. Control of these species and effects on corn grain yield were evaluated at various timings using POST applications of nicosulfuron vs. applications of various PRE herbicides at 17 locations across the midwestern U.S. in 1992 and 1993. Nicosulfuron applied to 5 to 10 cm giant foxtail and woolly cupgrass provided greater control than that observed with selected PRE herbicides. Giant foxtail control with nicosulfuron averaged 88%, and control of woolly cupgrass averaged 77% across all sites. Nicosulfuron, applied to 5 to 10 cm wild-prove millet, provided a level of control similar to that of selected PRE herbicides. Corn grain yield was greater when giant foxtail was controlled POST with nicosulfuron vs. PRE control with selected soil-applied herbicides. Corn grain yields were similar when nicosulfuron was applied POST to 5 to 10 cm woolly cupgrass or wild-prove millet vs. PRE control of these grass weeds. Across a broad range of geographical locations, nicosulfuron, applied POST to 5 to 10 cm tall grass, provided greater or similar levels of weed control vs. the selected PRE herbicides, with no deleterious effect on grain yield.
ISSN:0043-1745
1550-2759
DOI:10.1017/S0043174500092596