Importance

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Abstract

Compounds of the formula I ##STR1## in which R.sub.1 is C.sub.1 -C.sub.4 alkyl; R.sub.2 is cyano or NH.sub.2 C(S)--; R.sub.3 is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 haloalkyl, C.sub.3 - or C.sub.4 alkenyl, C.sub.3 - or C.sub.4 alkynyl, C.sub.3 -C.sub.8 haloalkenyl, NC--CH.sub.2 --, HOC(O)--CH.sub.2 -- or C.sub.1 -C.sub.4 alkoxy-C(O)--CH.sub.2 --; W is a group ##STR2## and R.sub.4 to R.sub.6, R.sub.60, R.sub.61, R.sub.70, X.sub.1, X.sub.2, n.sub.1 and A.sub.1 --B.sub.1 are as defined in claim 1, and the pyrazole N-oxide, agronomically acceptable salts and stereomers of these compounds of the formula I, with the exclusion of the compound of the formula ##STR3## have good selective herbicidal properties when used pre- and post-emergence. The preparation of these compounds and their use as herbicidally active ingredients are described.

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First Claim