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Weed Control in Soybean (Glycine max) with Cloransulam and Diclosulam

Published online by Cambridge University Press:  20 January 2017

Krishna N. Reddy
Krishna N. Reddy*
Affiliation:
Southern Weed Science Research Unit, United States Department of Agriculture, Agricultural Research Service, P.O. Box 350, Stoneville, MS 38776. E-mail: kreddy@ag.gov
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Abstract

Field studies were conducted in 1997 and 1998 to evaluate weed control and soybean (Glycine max) yield with cloransulam and diclosulam. Cloransulam at 35 g/ha applied preplant incorporated (PPI) and preemergence (PRE) controlled at least 91% of hyssop spurge (Euphorbia hyssopifolia) and prickly sida (Sida spinosa) and at least 82% of entireleaf morningglory (Ipomoea hederacea var. integriuscula) and pitted morningglory (Ipomoea lacunosa) at 7 wk after planting. Control of these species with cloransulam was not affected by method of soil application. Control of prickly sida with cloransulam PPI or PRE was better than with cloransulam postemergence (POST) at 18 g/ha. Soybean yields were similar with cloransulam PPI (2,880 kg/ha) or PRE (3,110 kg/ha) and were comparable to imazaquin PRE at 140 g/ha (3,080 kg/ha). Weed control and soybean yields with cloransulam POST were similar to that with chlorimuron POST at 11 g/ha. SAN 582 plus cloransulam PRE followed by cloransulam POST provided the highest soybean yield (3,450 kg/ha). Diclosulam PPI or PRE provided similar levels of control of hyssop spurge, Ipomoea morningglories, and prickly sida. Overall, control of these species with diclosulam PPI or PRE was similar to that obtained with sulfentrazone plus chlorimuron PRE. Soybean yields (≥ 3,290 kg/ha) were similar regardless of method of diclosulam application, and yields were equivalent to that of sulfentrazone plus chlorimuron PRE (3,270 kg/ha).

Keywords

hyssop spurge, Euphorbia hyssopifolia L. # EPHHSpitted morningglory, Ipomoea lacunosa L. # IPOLAprickly sida, Sida spinosa L. # SIDSPsoybean, Glycine max (L.) Merr. ‘DP 3588.’MetolachlorSAN 582EPHHSIPOHGIPOLAPANRASIDSPfb, followed byPOST, postemergencePPI, preplant incorporatedPRE, preemergenceWAP, weeks after planting
Type
Research Article
Information
Weed Technology , Volume 14 , Issue 2 , June 2000 , pp. 293 - 297
Copyright
Copyright © Weed Science Society of America 

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