O-(Substituted phenyl) N-methylcarbamates as herbicide extenders
AssigneeStauffer Chemical Company
InventorDaniel L. Hyzak
Life of this patent
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Abstract
Herbicidally active thiolcarbamates are employed in combination with certain O-(substituted phenyl) N-methylcarbamates having the formula ##STR1## in which R.sup.4 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.3 alkyl, R.sup.5 is C.sub.1 -C.sub.3 alkyl, R.sup.6 is selected from the group consisting of hydrogen, formyl, C.sub.1 -C.sub.3 alkoxy, and N-methylcarbamoyloxy, and X is selected from the group consisting of oxygen and sulfur. 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.
Claims15
An herbicidal composition of extended soil life comprising
- (a) an herbicidally effective amount of a thiolcarbamate having the formula ##STR10## 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 an O-(substituted phenyl) N-methylcarbamate sufficient to extend the soil life of said thiolcarbamate, said O-(substituted phenyl) N-methylcarbamate having the formula ##STR11## in which R.sup.4 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.3 alkyl,
- R.sup.5 is C.sub.1 -C.sub.3 alkyl,
- R.sup.6 is selected from the group consisting of hydrogen, formyl, C.sub.1 -C.sub.3 alkoxy, and N-methylcarbamoyloxy, and
- X is selected from the group consisting of oxygen and sulfur.
An herbicidal composition of extended soil life comprising an herbicidally effective amount of S-ethyl N,N-di-n-propylthiolcarbamate and an amount of an O-(substituted phenyl) N-methylcarbamate sufficient to extend the soil life of said thiolcarbamate, said O-(substituted phenyl) N-methylcarbamate having the formula ##STR12## in which R.sup.4 is selected from the group consisting of hydrogen and methyl,
- R.sup.5 is methyl,
- R.sup.6 is selected from the group consisting of hydrogen, formyl, methoxy, and N-methylcarbamoyloxy, and
- X is selected from the group consisting of oxygen and sulfur.
A method of controlling undesirable vegetation which comprises applying to the locus where control is desired both
- (a) an herbicidally effective amount of a thiolcarbamate having the formula ##STR15## 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 an O-(substituted phenyl) N-methylcarbamate sufficient to extend the soil life of said thiolcarbamate, said O-(substituted phenyl) N-methylcarbamate having the formula ##STR16## in which R.sup.4 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.3 alkyl,
- R.sup.5 is C.sub.1 -C.sub.3 alkyl,
- R.sup.6 is selected from the group consisting of hydrogen, formyl, C.sub.1 -C.sub.3 alkoxy, and N-methylcarbamoyloxy, and
- X is selected from the group consisting of oxygen and sulfur.
A method of controlling undesirable vegetation which comprises applying to the locus where control is desired both an herbicidally effective amount of S-ethyl N,N-di-n-propylthiolcarbamate and an amount of an O-(substituted phenyl) N-methylcarbamate sufficient to extend the soil life of said thiolcarbamate, said O-(substituted phenyl) N-methylcarbamate having the formula ##STR17## in which R.sup.4 is selected from the group consisting of hydrogen and methyl,
- R.sup.5 is methyl,
- R.sup.6 is selected from the group consisting of hydrogen, formyl, methoxy, and N-methylcarbamoyloxy, and
- X is selected from the group consisting of oxygen and sulfur.
A method of extending the soil life of a thiolcarbamate having the formula ##STR20## 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 an O-(substituted phenyl) N-methylcarbamate having the formula ##STR21## in which R.sup.4 is selected from the group consisting of hydrogen and C.sub.1 -C.sub.3 alkyl;
- R.sup.5 is C.sub.1 -C.sub.3 alkyl,
- R.sup.6 is selected from the group consisting of hydrogen, formyl, C.sub.1 -C.sub.3 alkoxy, and N-methylcarbamoyloxy, and
- X is selected from the group consisting of oxygen and sulfur.
A method of extending the soil life of S-ethyl N,N-di-n-propylthiolcarbamate which comprises applying to the soil containing said thiolcarbamate or to which said thiolcarbamate is to be applied an effective amount of an O-(substituted phenyl) N-methylcarbamate having the formula ##STR22## in which R.sup.4 is selected from the group consisting of hydrogen and methyl,
- R.sup.5 is methyl,
- R.sup.6 is selected from the group consisting of hydrogen, formyl, methoxy, and N-methylcarbamoyloxy, and
- X is selected from the group consisting of oxygen and sulfur.
Dependencies are inferred from the claim text.