Herbicidal compositions containing para-substituted benzenesulfonylureas and salts thereof and methods of employing such compositions
AssigneeThe O. M. Scott & Sons Company
InventorsLawrence S. Wittenbrook, Richard J. Timmons, Raymond D. Fleming
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Abstract
Benzenesulfonylureas of the formula: ##SPC1## Where R is methyl or ethyl, R.sub.1 is methyl or ethyl, and R.sub.2 is hydrogen, methyl, or ethyl and salts of those benzenesulfonylureas of formula I having the formula: ##SPC2## Where R, R.sub.1, and R.sub.2 are as aforesaid, and Z is an alkali metal, an alkaline earth metal, or ##EQU1## where R.sub.3, R.sub.4, and R.sub.5 are each hydrogen or a C.sub.1 -C.sub.4 alkyl; the use of compounds of formulas I and II; and compositions containing such compounds.
Claims10
The method of selectively controlling the growth of undesirable grass in an area in which desirable grass is present, comprisng the step of applying to said area after the emergence of the undesirable grass a herbicidally effective amount of a benzenesulfonylurea of the formula:
- ##SPC13##
- where R is methyl or ethyl, R.sub.1 is methyl or ethyl, and R.sub.2 is hydrogen, methyl, or ethyl or a salt thereof selected from the group of alkali metal, alkaline earth metal, ammonium, and ammonium substituted with one to three C.sub.1 -C.sub.4 alkyl radicals.
The method of selectively controlling the growth of a crabgrass in an area in which desirable grass is present, comprising the step of applying to said area after the emergence of the crabgrass a herbicidally effective amount of a benzenesulfonylurea of the formula:
- ##SPC14##
- where R is methyl or ethyl, R.sub.1 is methyl or ethyl, and R.sub.2 is hydrogen, methyl, or ethyl or a salt thereof selected from the group of alkali metal, alkaline earth metal, ammonium, and ammonium substituted with one to three C.sub.1 -C.sub.4 alkyl radicals.
Dependencies are inferred from the claim text.