Abstract: Novel herbicidal N-cyanopyridazinones of the general formula ##STR1## in which the radicals R.sub.1, R.sub.2 and R.sub.3 independently of one another denote hydrogen, halogen, amino, nitro, cyano, alkyl, aryl, aralkyl, alkoxy or aryloxy groups, a process for their preparation, a herbicidal composition comprising them, and a method of controlling weeds.

Abstract: A method for combatting weeds by applying to the weeds or their environment, a phenylpyridazine, wherein the phenyl group is substituted by hydroxy, halogen, cyano, nitro, amino, alkyl, alkoxy, cycloalkyl, cycloalkoxy, phenyl, phenoxy, alkylthio or an alkylsulfonyl group and wherein the pyridazinyl ring is substituted in the 4-position by hydroxy or by a --O--C(O)-- derivative.

Abstract: Allylaminoethyltriazoles of the formula: ##STR1## in which R is a hydrogen atom or an alkyl group containing 1 to 5 carbon atoms; each of Ar and Ar' is an unsubstituted phenyl group, a phenyl group substituted by one or more substituents selected from C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.3 alkoxy, nitro and halogen, an unsubstituted thienyl group, or a thienyl group substituted by halogen or naphthyl; phytophysiologically or pharmacologically tolerated acid addition salts thereof; and fungicidal and antimycotic agents containing such compounds.

Abstract: New allylaminoethylimidazoles of the formula: ##STR1## in which R is a hydrogen atom or an alkyl group containing 1 to 5 carbon atoms; each of Ar and Ar' is an unsubstituted phenyl group, a phenyl group substituted by one or more substituents selected from C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.3 alkoxy, nitro and halogen, an unsubstituted thienyl group, or a thienyl group substituted by halogen or naphthyl; phytophysiologically or pharmacologically tolerated acid addition thereof; and fungicidal and antimycotic agents containing such compounds.