Weed management in peanut (Arachis hypogaea) with diclosulam preemergence

Field studies were conducted at five locations in North Carolina and Virgin ia in 1996 and 1997 to evaluate weed control and peanut (Arachis hypogaea) response to diclosulam that was applied preemergence (PRE) and in systems w ith commercial standards. All plots received a preplant incorporated (PPI) treatment of ethalfluralin at 840 g ai/ha. Diclosulam controlled common lam bsquarters (Chenopodium album L.), eclipta (Eclipta prostrata L.), entirele af morningglory (Ipomoea hederacea var. integriuscula Gray), ivyleaf mornin gglory [Ipomoea hederacea (L.) Jacq,], pitted morningglory (Ipomoea lacunos a L.), and prickly sida (Sida spinosa L.) as well as and frequently better than the commercial standards of acifluorfen plus bentazon applied postemer gence (POST), paraquat plus bentazon early POST followed by (fb) imazapic P OST, or imazapic POST. Systems with ethalfluralin PPI plus diclosulam PRE a t 26 g ai/ha fb acifluorfen plus bentazon POST controlled a broader spectru m of weeds and yielded greater than systems of ethalfluralin PPI fb imazapi c POST or ethalfluralin PPI fb acifluorfen plus bentazon POST. Peanut exhib ited excellent tolerance to diclosulam PRE at 17, 26, or 35 g/ha.