Abstract: Synergistic herbicidal activity is displayed by compositions comprising the following two components:(a) a pyrrolidone of the formula ##STR1## in which X is selected from the group consisting of hydrogen, chlorine and methyl; Y is selected from the group consisting of hydrogen, chlorine and bromine; Z is selected from the group consisting of chlorine and bromine; R.sup.1 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.4 alkyl; R.sup.2 is selected from the group consisting of hydrogen, halogen, C.sub.1 -C.sub.4 alkyl, acetyl, trifluoromethyl, nitro, cyano, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 alkylsulfinyl, C.sub.1 -C.sub.4 alkylsulfonyl, trifluoromethylsulfinyl, trifluoromethylsulfonyl, pentafluoropropionamido, and 3-methylureido; and R.sup.3 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, chlorine and trifluoromethyl; and(b) a phosphonic acid of the formula ##STR2## in which R.sup.4 is selected from the group consisting of C.

Abstract: Synergistic herbicidal activity is displayed by composition comprising the following two components:(a) a pyrrolidone of the formula ##STR1## in which X is selected from the group consisting of hydrogen, chlorine, and methyl; Y is selected from the group consisting of hydrogen, chlorine, and bromine; Z is selected from the group consisting of chlorine and bromine; R.sup.1 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.4 alkyl; R.sup.2 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, acetyl, trifluoromethyl, nitro, cyano, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 alkylsulfinyl, C.sub.1 -C.sub.4 alkylsulfonyl, trifluoromethylthio, trifluoromethylsulfinyl, trifluoromethylsulfonyl, pentafluoropropionamido, and 3-methylureido; and R.sup.3 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, chlorine and trifluoromethyl; and(b) a cyclohexenedione of the formula ##STR2## in which R.sup.

Abstract: Synergistic herbicidal activity is displayed by compositions comprising the following two components:(a) a pyrrolidone of the formula ##STR1## in which X is selected from the group consisting of hydrogen, chlorine and methyl; Y is selected from the group consisting of hydrogen, chlorine and bromine; Z is selected from the group consisting of chlorine and bromine; R.sup.1 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.4 alkyl; R.sup.2 is selected from the group consisting of hydrogen, halogen, C.sub.1 -C.sub.4 alkyl, acetyl, trifluoromethyl, nitro, cyano, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 alkylsulfinyl, C.sub.1 -C.sub.4 alkylsulfonyl, trifluoromethylthio, trifluoromethylsulfinyl, trifluoromethylsulfonyl, pentafluoropropionamido, and 3-methylureido; andR.sup.3 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, chlorine and trifluoromethyl; and(b) a m-ureidophenyl carbamate of the formula ##STR2## in which R.sup.4 is C.sub.1 -C.

Abstract: Synergistic herbicidal activity is displayed by a composition comprising the following two components:(a) a pyrrolidone of the formula ##STR1## in which X is selected from the group consisting of hydrogen, chlorine and methyl; Y is selected from the group consisting of hydrogen, chlorine and bromine; Z is selected from the group consisting of chlorine and bromine; R.sup.1 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.4 alkyl; R.sup.2 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, acetyl, trifluoromethyl, nitro, cyano, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 alkylsulfonyl, C.sub.1 -C.sub.4 alkylsulfinyl, trifluoromethylthio, trifluoromethylsulfinyl, trifluoromethylsulfonyl, pentafluoropropionamido, and 3-methylureido; and R.sup.3 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, chlorine and trifluoromethyl; and(b) a urea of the formula ##STR2## in which R.sup.

Abstract: Synergistic herbicidal activity is displayed by compositions comprising the following two components:(a) a pyrrolidone of the formula ##STR1## and (b) an acetanilide of the formula ##STR2## in which R.sup.1 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, and chlorine;R.sup.2 is selected from the group consisting of hydrogen, C.sub.2 -C.sub.6 alkoxyalkyl, and C.sub.3 -C.sub.6 carbalkoxyalkyl;R.sup.3 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, and chlorine;R.sup.4 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, and chlorine; andR.sup.5 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, chlorine, and --NHSO.sub.2 CF.sub.3,at a weight ratio of (a) to (b) of from about 0.1:1 to about 50:1.

Abstract: Synergistic herbicidal activity is displayed by a composition comprising the following two components:(a) a pyrrolidone of the formula ##STR1## in which X is selected from the group consisting of hydrogen, chlorine, and methyl; Y is selected from the group consisting of hydrogen, chlorine, and bromine; Z is selected from the group consisting of chlorine and bromine; R.sup.1 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.4 alkyl; R.sup.2 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, acetyl, trifluoromethyl, nitro, cyano, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.1 -C.sub.4 alkylsulfonyl, C.sub.1 -C.sub.4 alkylsulfinyl, trifluoromethylthio, trifluoromethylsulfinyl, trifluoromethylsulfonyl, pentafluoropropionamido, and 3-methylureido; and R.sup.3 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, chlorine and trifluoromethyl; and(b) 3-amino-1,2,4-triazole,at a weight ratio of (a) to (b) of from about 0.01:1 to about 20:1.

Abstract: Synergistic herbicidal activity is displayed by compositions comprising the following two components:(1) 1-allyl-3-chloro-4-chloromethyl-2-pyrrolidone, and(2) 2-ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranyl methanesulfonate.

Abstract: Synergistic herbicidal activity is displayed by compositions comprising the following two components:(1) an amide of the formula ##STR1## in which R.sup.1 is substituted phenyl, with one to three substituents independently selected from the group consisting of chlorine, bromine, iodine, or C.sub.1 -C.sub.4 alkyl,R.sup.2, r.sup.3, and R.sup.4 are independently C.sub.1 -C.sub.4 alkyl, and,R.sup.5 is hydrogen or C.sub.1 -C.sub.4 alkyl,And(2) a haloacetanilide of the formula ##STR2## in which R.sup.6 and R.sup.7 are independently selected from the group consisting of hydrogen and C.sub.1 -C.sub.6 alkyl,R.sup.8 is a member selected from the group consisting of C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.6 alkenyl, C.sub.3 -C.sub.6 alkynyl, -R.sup.9 -O-R.sup.10, and ##STR3## in which R.sup.9 is C.sub.1 -C.sub.8 alkylene and R.sup.10 is C.sub.1 -C.sub.6 alkyl, andX is chlorine, bromine, or iodine.