| abstract |
Method of retarding plant growth comprises applying an effective amt. of cpd. of formula (I), R1 and R2 are independently a substd. or unsubstd. carbocyclic or heterocyclic ring system, Y1 and Y2 are independently a substd. or unsubstd. heteroatom. Y3 and Y4 are independently hydrogen or a substd. or unsubstd. heteroatom or substd. carbon atom or a substd. or unsubstd. branched ot straight chain contg. two or more carbon atoms, or heteroatoms or (e.g.) halogen, alkylcarbonyl, formyl, alkylcarbonylalkyl, alkoxycarbonylalkyl, etc. - |