5-oxy or thiomethyl substituted oxazolidine herbicide antidotes

Abstract

N-haloacyl oxazolidines substituted in the 5-position with oxy or thio containing groups as new compositions of matter useful as active herbicidal antidotes to protect against and decrease crop injury when used with thiolcarbamate herbicides, and when applied in various methods; improved herbicidal compositions and utility of said compositions to protect against and decrease phytotoxic injury to crops when employing thiolcarbamate herbicides and a two-part herbicide system consisting essentially of a first-part of one or more thiolcarbamate herbicides and a second part of an effective antidote compound therefor, said antidote compounds of the class 3-haloacyl oxazolidine having the formula ##STR1## wherein X is selected from the group consisting of oxygen and sulfur; R.sub.1 is selected from the group consisting of alkyl and alkenyl; R is selected from the group consisting of haloalkyl, alkylthio and p-tolylsulfonamido; R.sub.2 and R.sub.3 are independently selected from the group consisting of hydrogen and lower alkyl, each having 1 to 3 carbon atoms, inclusive; provided that the carbon content of R.sub.1 +R is less than or equal to 6 carbon atoms and further provided that when XR.sub.1 is alkylthio, then R is other than haloalkyl having 3 to 4 carbon atoms, inclusive, and provided that when XR.sub.1 is methoxy, R is other than 2,3-dibromopropyl; and in addition a compound selected from the group of compounds consisting of 2,2-dimethyl-3(3-bromopropionyl)5-pentoxymethyl oxazolidine; 2,2-dimethyl-3(5-chlorovaleryl)5-isopropoxymethyl oxazolidine; 2,2-dimethyl-3(5-chlorovaleryl)5-allyloxymethyl oxazolidine.