4-Phenyl-1,2,3-thiadiazoles as herbicide extenders
AssigneeStauffer Chemical Company
InventorsJoanna K. Hsu, Arnold D. Gutman
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Abstract
Herbicidally active thiolcarbamates are employed in combination with certain 4-phenyl-1,2,3-thiadiazoles having the formula ##STR1## in which R.sup.4 is selected from the group consisting of trifluoromethyl and ##STR2## in which R.sup.5 is selected from the group consisting of C.sub.1 -C.sub.3 alkyl, phenyl, and phenyl substituted with one or more members selected from the group consisting of halogen and trifluoromethyl. In a typical application, the 4-phenyl-1,2,3-thiadiazole 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.
Claims11
A method of extending the soil life of a thiolcarbamate having the formula ##STR16## 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 4-phenyl-1,2,3-thiadiazole having the formula ##STR17## in which R.sup.4 is selected from the group consisting of trifluoromethyl and ##STR18## in which R.sup.5 is selected from the group consisting of C.sub.1 -C.sub.3 alkyl, phenyl, and phenyl substituted with one or more members selected from the group consisting of halogen and trifluoromethyl.
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 a 4-phenyl-1,2,3-thiadiazole having the formula ##STR19## in which R.sup.4 is selected from the group consisting of trifluoromethyl and ##STR20## in which R.sup.5 is selected from the group consisting of methyl, chlorophenyl, dichlorophenyl, trifluoromethylphenyl, and chlorotrifluoromethylphenyl.
An herbicidal composition of extended soil life comprising an herbicidally effective amount of S-ethyl N,N-di-n-propylthiolcarbamate and an amount of a 4-phenyl-1,2,3-thiadiazole sufficient to extend the soil life of said thiolcarbamate wherein said 4-phenyl-1,2,3-thiadiazole has the formula ##STR25##
An herbicidal composition of extended soil life comprising an herbicidally effective amount of S-ethyl N,N-di-n-propylthiolcarbamate and an amount of a 4-phenyl-1,2,3-thiadiazole sufficient to extend the soil life of said thiolcarbamate wherein said 4-phenyl-1,2,3-thiadiazole has the formula ##STR26##
An herbicidal composition of extended soil life comprising an herbicidally effective amount of S-ethyl N,N-di-n-propylthiolcarbamate and an amount of a 4-phenyl-1,2,3-thiadiazole sufficient to extend the soil life of said thiolcarbamate wherein said 4-phenyl-1,2,3-thiadiazole has the formula ##STR27##
A method of controlling undesirable vegetation comprising 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 a 4-phenyl-1,2,3-thiadiazole sufficient to extend the soil life of said thiolcarbamate wherein said 4-phenyl-1,2,3-thiadiazole has the formula ##STR28##
Dependencies are inferred from the claim text.