TY - JOUR
T1 - Comparison of total postemergence weed control programs in soybean
AU - Hart, Stephen E.
AU - Wax, Loyd M.
AU - Hager, Aaron G.
PY - 1997
Y1 - 1997
N2 - Field studies were conducted in 1994 and 1995 in central and southern Illinois to compare several total postemergence weed control programs in soybean [Glycine max (L.) Merr.]. Herbicide programs evaluated were imazethapyr (an acetolactate synthase [ALS] inhibiting herbicide) applied alone or in combination with lactofen and two non-ALS herbicide programs consisting of combinations of bentazon, acifluorfen, and sethoxydim and combinations of fomesafen, fluazifop, and fenoxyprop. These treatments were applied early postemergence (EPOST, V-1 soybean-first trifoliate) and postemergence (POST, V-2 soybean-second trifoliate). Non-ALS herbicide programs generally provide more effective weed control POST, while weed control with imazethapyr tended to be greater EPOST. Non-ALS herbicide programs applied POST provided weed control levels that were equal to imazethapyr in three out of four experiments. In 1994 at Brownstown, broadleaf weed control was poor with non-ALS herbicide programs when weed growth stages were larger and environmental conditions more extreme than other experiments. Adding lactofen to imazethapyr increased broadleaf weed control in some instances but decreased giant foxtail (Setaria faberii L.) control. Imazethapyr plus lactofen tended to produce the greatest degree of soybean injury.
AB - Field studies were conducted in 1994 and 1995 in central and southern Illinois to compare several total postemergence weed control programs in soybean [Glycine max (L.) Merr.]. Herbicide programs evaluated were imazethapyr (an acetolactate synthase [ALS] inhibiting herbicide) applied alone or in combination with lactofen and two non-ALS herbicide programs consisting of combinations of bentazon, acifluorfen, and sethoxydim and combinations of fomesafen, fluazifop, and fenoxyprop. These treatments were applied early postemergence (EPOST, V-1 soybean-first trifoliate) and postemergence (POST, V-2 soybean-second trifoliate). Non-ALS herbicide programs generally provide more effective weed control POST, while weed control with imazethapyr tended to be greater EPOST. Non-ALS herbicide programs applied POST provided weed control levels that were equal to imazethapyr in three out of four experiments. In 1994 at Brownstown, broadleaf weed control was poor with non-ALS herbicide programs when weed growth stages were larger and environmental conditions more extreme than other experiments. Adding lactofen to imazethapyr increased broadleaf weed control in some instances but decreased giant foxtail (Setaria faberii L.) control. Imazethapyr plus lactofen tended to produce the greatest degree of soybean injury.
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U2 - 10.2134/jpa1997.0136
DO - 10.2134/jpa1997.0136
M3 - Article
AN - SCOPUS:0030940637
SN - 0890-8524
VL - 10
SP - 136
EP - 141
JO - Journal of Production Agriculture
JF - Journal of Production Agriculture
IS - 1
ER -