Isonitriles as herbicide extenders
AssigneeStauffer Chemical Company
InventorRaymond A. Felix
Life of this patent
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Abstract
Herbicidally active thiolcarbamates are employed in combination with certain substituted phenyl isonitriles having the formula ##STR1## in which R.sup.1 is selected from the group consisting of C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylthio, phenyl, halogen, benzylthio, and p-chlorobenzylthio, and R.sup.2 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, and halogen. In a typical application, the isonitrile 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.
Claims20
An herbicidal composition comprising
- (a) an herbicidally effective amount of a thiolcarbamate having the formula ##STR35## in which R.sup.1, R.sup.2, and R.sup.3 are independently C.sub.2 -C.sub.4 alkyl;
- and
- (b) an amount of a substituted phenyl isonitrile sufficient to extend the soil life of said thiolcarbamate, said isonitrile having the formula ##STR36## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylthio, phenyl, halogen, benzylthio, and p-chlorobenzylthio, and
- R.sup.5 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, and halogen.
An herbicidal composition comprising an herbicidally effective amount of S-ethyl N,N-di-n-propylthiolcarbamate and an amount of a substituted phenyl isonitrile sufficient to extend the soil life of said thiolcarbamate, said isonitrile having the formula ##STR37## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl, methoxy, methylthio, phenyl, chlorine, benzylthio, and p-chorobenzylthio, and
- R.sup.5 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.2 alkyl, methoxy, and chlorine.
An herbicidal composition comprising
- (a) an herbicidally effective amount of a thiolcarbamate having the formula ##STR38## in which R.sup.1, R.sup.2, and R.sup.3 are independently C.sub.2 -C.sub.4 alkyl;
- (b) an amount of a substituted phenyl isonitrile sufficient to extend the soil life of said thiolcarbamate, said isonitrile having the formula ##STR39## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl, methoxy, methylthio, phenyl, halogen, benzylthio, and p-chorobenzylthio, and
- R.sup.5 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.2 alkyl, methoxy, and halogen;
- and
- (c) an inert diluent carrier.
An herbicidal composition comprising an herbicidally effective amount of S-ethyl N,N-di-n-propylthiolcarbamate, an amount of a substituted phenyl isonitrile sufficient to extend the soil life of said thiolcarbamate, said isonitrile having the formula ##STR40## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl, methoxy, methylthio, phenyl, benzylthio, and and p-chorobenzylthio, and
- R.sup.5 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.2 alkyl, methoxy, and chlorine,
- and an inert diluent carrier.
A method of controlling undesirable vegetation comprising applying to the locus where control is desired both
- (a) an herbicidally effective amount of a thiolcarbamate having the formula ##STR41## in which R.sup.1, R.sup.2, and R.sup.3 are independently C.sub.2 -C.sub.4 alkyl;
- and
- (b) an amount of a substituted phenyl isonitrile sufficient to extend the soil life of said thiolcarbamate, said isonitrile having the formula ##STR42## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, C.sub.1 -C.sub.6 alkylthio, phenyl, halogen, benzylthio, and p-chlorobenzylthio, and
- R.sup.5 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, and halogen.
A method of controlling undesirable vegetation comprising applying to the locus where control is desired an herbicidal composition comprising an herbicidally effective amount of a substituted phenyl isonitrile sufficient to extend the soil life of said thiolcarbamate having the formula ##STR43## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl, methoxy, methylthio, phenyl, halogen, benzylthio, and p-chorobenzylthio, and
- R.sup.5 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.2 alkyl, methoxy, and halogen.
A method of extending the soil life of a thiolcarbamate having the formula ##STR44## in which R.sup.1, R.sup.2, and R.sup.3 are independently C.sub.2 -C.sub.4 alkyl;
- which comprises applying to the soil containing said thiolcarbamate or to which said thiolcarbamate is to be applied an effective amount of a substituted phenyl isonitrile having the formula ##STR45## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkylthio, phenyl, halogen, benzylthio, and p-chlorobenzylthio, and
- R.sup.5 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, and halogen.
A method of extending the soil life of S-ethyl N,N-di-n-propylthiocarbamate which comprises applying to the soil containing said thiolcarbamate or to which said thiolcarbamate is to be applied an effective amount of a substitute phenyl isonitrile having the formula ##STR46## in which R.sup.4 is selected from the group consisting of C.sub.1 -C.sub.4 alkyl, methoxy, methylthio, phenyl, halogen, benzylthio, and p-chorobenzylthio, and
- R.sup.5 is selected from the group consisting of hydrogen, C.sub.1 -C.sub.2 alkyl, methoxy, and halogen.
Dependencies are inferred from the claim text.