Substituted phenylalkyl quinclidinum salts and their use as plant growth control agents

Compounds are prepared which correspond to the formula wherein R represents methylene, ethylene or ethylidene; R1 represents hydrogen, hydroxy, chloro, bromo, fluoro, iodo, cyano, -COOR2, oxo or acetoxy; Y represents hydrogen, chloro, bromo, iodo or fluoro; X represents hydrogen, alkyl of 1 to 6 carbon atoms, alkoxy of 1 to 6 carbon atoms, alkylthio of 1 to 6 carbon atoms, alkenyloxy of 2 to 6 carbon atoms, alkynyloxy of 2 to 6 carbon atoms, cyano, trifluoromethyl, (trifluoromethyl)thio, (trifluoromethyl)sulfonyl, trifluoromethoxy, -COOR2 wherein R2 is alkyl of 1 to 6 carbon atoms, -C(O/S)NR3R4 wherein R3 represents R2, alkenyl of 2 to 6 carbon atoms or alkynyl of 2 to 6 carbon atoms and R4 represents R3 or hydrogen, or -S(O)2NR2R3 with the proviso that X and Y cannot both be hydrogen at the same time and A represents a non-phytotoxic anion. The compounds have been found to be active plant growth enhancers.