Stauffer Chemical Company

Ici Americas, Inc.

Daniel L Hyzak

Reed A Gray

Don R Baker

Joanna K Hsu

Ferenc M Pallos

Llewellyn W Fancher

Edmund J Gaughan

Gilbert G Patchett

Herbicidally active thiocarbamates are employed in combination with organophosphorothioates and -dithioates and -phosphonothioates, -dithioates and -trithioates, the latter in sufficient quantity to prevent soil degradation of the former. As a result, the herbidical effectiveness of the thiocarbamate is significantly enhanced and prolonged, rendering a single application of the herbicide effective over a longer period of time. Such herbicidal compositions can optionally contain a non-phytotoxic antidotally effective amount of an amide of haloalkanoic or dihaloalkanoic acid.

Herbicide compositions of extended soil life

Herbicidally active thiocarbamates are employed in combination with organophosphorothioates and -dithioates and -phosphonothioates, -dithioates and -trithioates, the latter in sufficient quantity to prevent soil degradation of the former. As a result, the herbicidal effectiveness of the thiocarbamate is significantly enhanced and prolonged, rendering a single application of the herbicide effective over a longer period of time. Such herbicidal compositions can optionally contain a non-phytotoxic antidotally effective amount of an amide of haloalkanoic or dihaloalkanoic acid.

The soil life of herbicidally active thiolcarbamates is extended by employing in combination therewith certain organophosphorus compounds having the formula 3 ##STR1## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy; R.sup.5 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.2 -C.sub.4 alkenylthio and C.sub.2 -C.sub.4 alkynylthio; R.sup.6 is selected from the group consisting of hydrogen , C.sub.1 -C.sub.10 alkyl, C.sub.5 -C.sub.7 cycloalkyl and phenyl; and R.sup.7 is selected from the group consisting of C.sub.2 -C.sub.4 alkenyl, C.sub.1 -C.sub.10 alkoxy, C.sub.1 -C.sub.10 alkylthio, C.sub.2 -C.sub.6 alkynoxy, C.sub.2 -C.sub.5 carbalkoxy, phenyl, phenoxy, (C.sub.1 -C.sub.3 alkoxy)phenyl, benzyl and benzyloxy, all optionally substituted with up to two halogen atoms.

The soil life of herbicidally active thiocarbamates is extended by employing in combination therewith certain organophosphorus compounds having the formula ##STR1## in which R.sup.4 is selected from the group consisting of cyclohexyl and phenyl; R.sup.5 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy; and R.sup.6 is selected from the group consisting of C.sub.3 -C.sub.6 alkoxy, diallylamino, and --NHR.sup.7 where R.sup.7 is C.sub.3 -C.sub.8 alkoxyalkyl.

Herbicidally active thiolcarbamates are employed in combination with certain organophosphorus compounds having the formula ##STR1## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.4 alkoxy, and C.sub.1 -C.sub.4 alkylthio, R.sup.5 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.4 alkyl, R.sup.6 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.4 alkyl, and C.sub.2 -C.sub.4 alkoxyalkyl, R.sup.7 is selected from the group consisting of hydrogen and methyl and R.sup.8 is selected from the group consisting of hydrogen and methylthio. 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 organophosphorus compounds having the formula ##STR1## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy; R.sup.5 is selected from the group consisting of C.sub.1 -C.sub.4 alkoxy and C.sub.2 -C.sub.4 alkynylthio; R.sup.6 is C.sub.1 -C.sub.4 alkylene; R.sup.7 is selected from the group consisting of methyl and phenyl, X is oxygen or sulfur; Y is oxygen or sulfur; m is zero or one; and n is zero or one. 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 organophosphorous compounds having the formula ##STR1## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy and C.sub.1 -C.sub.4 alkylthio; R.sup.5 is selected from the group consisting of C.sub.1 -C.sub.4 alkoxy and C.sub.1 -C.sub.4 alkylthio; R.sub.6 is selected from the group consisting of C.sub.2 -C.sub.6 alkylene and C.sub.2 -C.sub.6 alkenylene; R.sup.7 is selected from the group consisting of hydrogen, phenyl, C.sub.1 -C.sub.4 alkyl and C.sub.2 -C.sub.4 alkenyl, all optionally substituted with up to two halogens; X is oxygen or sulfur; and n is zero or one. 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.

The soil life of herbicidally active thiocarbamates is extended by employing in combination therewith certain organophosphorus compounds having the formula ##STR1## in which R.sup.4 is C.sub.1 -C.sub.4 alkyl, R.sup.5 is selected from the group consisting of C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 cyanoalkylthio, and C.sub.1 -C.sub.4 alkylamino; R.sup.6 is selected from the group consisting of hydrogen, methyl, and carbomethoxy; R.sup.7 is selected from the group consisting of hydrogen and chlorine; and X is oxygen or sulfur.

The soil life of herbicidally active thiolcarbamates is extended by certain organophosphorus compounds having the formula ##STR1## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy; R.sup.5 is selected from the group consisting of C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylthio, C.sub.2 -C.sub.4 alkenoxy, and C.sub.2 -C.sub.4 alkenylthio; R.sup.6 is selected from the group consisting of phenyl, C.sub.1 -C.sub.4 alkylene, and C.sub.2 -C.sub.4 alkylthioalkylene; R.sup.7 is either phenyl or cyclohexenyl; X is oxygen or sulfur, and n is zero or one.

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

Herbicidally active thiocarbamates are employed in combination with certain iminophenyl N-methylcarbamates having the formula ##STR1## in which R.sup.4 is selected from the group consisting of hydrogen, halogen, and C.sub.1 -C.sub.3 alkyl,

Iminophenyl N-methylcarbamates as herbicide extenders

Herbicidally active thiocarbamates are employed in combination with N-methylthiocarbamylethyl-N'-carbamate having the formula ##STR1## In a typical application, the thiocarbamylethylcarbamate 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.

Herbicidal compositions of extended soil life

Herbicidally active thiolcarbamates are employed in combination with certain substituted carbamates having the formula ##STR1## in which R.sup.4 and R.sup.5 are each methyl,

Herbicide compositions containing soil life extenders and antidotes

Halogenated allylthioisopropyl N-methylcarbamates as herbicide extenders

Herbicidal thiolcarbamate sulfoxide compositions of improved stability.

Growing community of inventors

Saratoga, CA, United States of America

Daniel L Hyzak