Herbicide compositions of extended soil life
AssigneeStauffer Chemical Company
InventorDaniel L. Hyzak
Life of this patent
Estimating the term…
Abstract
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, R.sup.4 and R.sup.5 conjointly form C.sub.1 -C.sub.4 alkylenedioxy, R.sup.4 is --CF.sub.3 and R.sup.5 is hydrogen, or R.sup.4 is --CH.sub.2 Br and R.sup.5 is hydrogen. In a typical application, the carbamate 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.
Claims12
An herbicidal composition comprising
- (a) an herbicidally effective amount of a thiolcarbamate having the formula ##STR7## 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 carbamate having the formula ##STR8## in which R.sup.4 and R.sup.5 conjointly form C.sub.1 -C.sub.4 alkylenedioxy,
- the amount of said carbamate being sufficient to extend the soil life of said thiolcarbamate;
- and
- (c) an inert 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 ##STR9## 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 carbamate having the formula ##STR10## in which R.sup.4 and R.sup.5 conjointly form C.sub.1 -C.sub.4 alkylenedioxy,
- the amount of said carbamate being sufficient to extend the soil life of said thiolcarbamate.
A method of extending the soil life of a thiolcarbamate having the formula ##STR11## 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 carbamate having the formula ##STR12## in which R.sup.4 and R.sup.5 conjointly form C.sub.1 -C.sub.4 alkylenedioxy.
Dependencies are inferred from the claim text.