Herbicidal aryl triazolinones

An herbicidal compound of the formula ##STR8## in which X is Br, Cl, F or haloalkyl;

• Y is Br, Cl, F, methyl, haloalkyl, nitro, or a radical of the formula R.sup.8 OCH.sub.2 --, R.sup.8 SCH.sub.2 --, R.sup.8 SOCH.sub.2 --, or R.sup.8 SO.sub.2 CH.sub.2 -- where R.sup.8 l is C.sub.1 -C.sub.3 alkyl, C.sub.2 -C.sub.5 alkenyl, C.sub.3 -C.sub.5 alkynyl, phenyl, or halogen-, alkyl-, or haloalkyl-substituted phenyl;
• R.sup.3 is halogen, alkyl, haloalkyl, cyanoalkyl, phenylalkyl, alkoxyalkyl, alkylthio, alkylsulfinyl, alkylsulfonyl, alkylthioalkyl, alkylsulfinylalkyl or alkylsulfonylalkyl;
• R.sup.2 is alkyl, alkoxy, haloalkyl, alkenyl, or alkynyl, cyanoalkyl, thiocyanoalkyl, or a group of the formula -alkylene-Y'--R.sup.5 in which said alkylene group has 1 to 5 carbon atoms, Y' is oxygen or S(O).sub.r in which r is 0 to 2, and R.sup.5 is alkyl, alkenyl or alkynyl;
• R is dialkylamino, carboxymethyl, hydroxy, haloalkyl, phenyl, substituted phenyl, or benzyl, wherein the phenyl substituents are halogen, alkyl, alkoxy, cyano, cyanomethyl, nitro, amino, phenylamino, mono- or di-alkylamino, carboxyl, alkoxycarbonyl, alkoxyalkyl, alkoxycarbonylalkyl, alkoxyalkyl, benzyl, or hydroxy;
• R.sup.1 is hydrogen, an alkali or alkaline-earth metal, ammonium sulfonium or sulfoxonium salt-forming group, alkyl, benzyl, haloalkyl, alkoxy, SO.sub.2 R, alkynyl, alkenyl, a group of the formula alkylene-SO.sub.2 R or alkoxymethyl, wherein the alkyl, alkenyl, alkynyl and alkylene radicals of X, Y, R, R.sup.1, R.sup.2, R.sup.3, and R.sup.5 have no more than 10 carbon atoms.