acaricidi based piridinio derivatives and process for the plicarli on haunted places

摘要

Compounds of formula IN WHICH R1, R2, R3, R4 and R5 are the same or different and each represents hydrogen, halogen, nitro, alkyl, substituted alkyl, alkoxy, carboxy or an ester, amide or mono- or di-substituted amide thereof, aryl, heterocyclic, aralkyl, cyano or hydroxy, with the proviso that R3 does not represent a second group of formula I or II in which R3 is merely a bond; R6 represents a group of formula COR8, COOR8, CONR8R9 or SO2R8, in which R8 represents alkyl, substituted alkyl, aryl, substituted aryl, aralkyl, substituted aralkyl, aralkenyl, substituted aralkenyl, cycloalkyl or heterocyclic, and R9 represents hydrogen, alkyl, substituted alkyl, phenyl or substituted phenyl; R7 represents hydrogen, alkyl of 1 to 4 carbon atoms or a group as defined under R6; and X- represents one equivalent of an anion are acaricides, especially for use on crops.