Stauffer Chemical Company

Ici Americas, Inc.

Joanna K Hsu

Daniel L Hyzak

Ferenc M Pallos

Raymond A Felix

Arnold D Gutman

Llewellyn W Fancher

Edmund J Gaughan

Lawrence L Buren

Benjamin P Rodriquez

Charles J Duerksen

Michael P Ensminger

Nicholas N Poletika

This invention embodies a two-part herbicidal system comprised of an acylated 1,3-dicarbonyl herbicide compound corresponding to the formula ##STR1## and tautomeric forms thereof wherein R is an aromatic moiety, optionally substituted, and a non-phytotoxic antidotally effective amount of an antidote therefor selected from the group of amides of haloalkanoic acids, including oxazolidines and thiazolidines, aromatic oxime derivatives, thiazole carboxylic acids and derivatives, and 1,8-naphthalic anhydride.

Herbicidal compositions of acylated 1,3-dicarbonyl herbicides and

A synergistic herbicidal composition comprising a mixture of: (a) a herbicidally effective amount of 2-(2-chloro-4-methanesulfonylbenzoyl)-1,3-cyclohexanedione; and (b) a herbicidally effective amount of a compound selected from the group consisting of 2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine, 3-amino-2,5-dichlorobenzoic acid, and 2-chloro-N-isopropylacetanilide, and mixtures thereof; at a weight ratio of (a) to (b) of from about 0.1:1 to about 20:1.

Synergistic herbicide combinations and method of application

Herbicidally active thiolcarbamates are employed in combination with certain allyl amine salts of thiocarbamic acid compounds having the formula ##STR1## wherein R.sub.4 and R.sub.5 are independently selected from the group consisting of allyl, alkyl substituted allyl, and lower alkyl groups having from about 1 to about 6 carbon atoms;

Herbicide compositions of extended soil life

Herbicidally active thiolcarbamates are employed in combination with certain 4-phenyl-1,2,3-thiadiazoles having the formula ##STR1## in which R.sup.4 is selected from the group consisting of trifluoromethyl and ##STR2## in which R.sup.5 is selected from the group consisting of C.sub.1 -C.sub.3 alkyl, phenyl, and phenyl substituted with one or more members selected from the group consisting of halogen and trifluoromethyl. In a typical application, the 4-phenyl-1,2,3-thiadiazole is included in sufficient quantity to lessen the rate of soil degradation of the thiolcarbamate. As a result, the herbicidal effectiveness of the thiolcarbamate is enhanced and prolonged, rendering a single application of the herbicide effective over a longer period of time.

4-phenyl-1,2,3-thiadiazoles as herbicide extenders

Herbicidally active thiocarbamates are employed in combination with certain unsaturated aryl sulfides, sulfoxides or sulfones having the formula ##STR1## in which R.sup.4 is hydrogen, halogen, C.sub.1 -C.sub.6 alkyl or C.sub.1 -C.sub.6 alkoxy; R.sup.5 is C.sub.2 -C.sub.6 haloalkenyl or C.sub.2 -C.sub.6 alkynyl; and n equals 0 or 2. In a typical application, the unsaturated aryl sulfide, sulfoxide or sulfone is included in sufficient quantity to lessen the rate of soil degradation of the thiocarbamate. As a result, the herbicidal effectiveness of the thiocarbamate is enhanced and prolonged, rendering a single application of the herbicide effective over a longer period of time.

Herbicidally active thiolcarbamates are employed in combination with certain halogenated allylthioisopropyl N-methylcarbamates having the formula ##STR1## in which R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, and R.sup.9 are independently halogen. In a typical application, the N-methylcarbamate is included in sufficient quantity to lessen the rate of soil degradation of the thiolcarbamate. As a result, the herbicidal effectiveness of the thiolcarbamate is enhanced and prolonged, rendering a single application of the herbicide effective over a longer period of time.

Halogenated allylthioisopropyl N-methyl carbamates as herbicide extenders

4-Phenyl-1,2,3-thiadiazoles as herbicide extenders

Halogenated allylthioisopropyl N-methylcarbamates as herbicide extenders

Herbicidally active thiolcarbamates are employed in combination with certain N-methylcarbamoyloxy benzaldehyde imines having the formula ##STR1## in which R.sup.4 is selected from the group consisting of chlorophenyl, chlorophenylthiomethylphenyl, acetoxy, and ##STR2## where R.sup.5 is selected from the group consisting of phenyl, pyridyl, and cyanomethyl, and n is zero or one. In a typical application, the imine is included in sufficient quantity to lessen the rate of soil degradation of the thiolcarbamate. As a result, the herbicidal effectiveness of the thiolcarbamate is enhanced and prolonged, rendering a single application of the herbicide effective over a longer period of time.

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Sunnyvale, CA, United States of America

Joanna K Hsu