Patent ID: 6117818
Filing Date: 2000-09-12
Classification: A01N

Abstract:
A method of defoliating plants which comprises applying a composition, comprising as an active ingredient, at least one 3-substituted pyrazole derivative in a defoliating effective amount, in terms of the active ingredient, per hectare, to plants requiring defoliation, said 3-substituted pyrazole derivative represented by the general formula (I): ##STR4## wherein R is--Y.sup.1 R.sup.3(wherein R .sup.3 is a (C.sub.1-6)alkyl group, a halo(C.sub.1-6)alkyl group, a (C.sub.2-6)alkenyl group or a (C.sub.2-6)alkynyl group, and Y.sup.1 is --O-- or--S--,--Y.sup.2 CH(R.sup.4)CO--OR.sup.5(wherein R .sup.4 is a hydrogen atom or a (C.sub.1-6)alkyl group, R.sup.5 is a hydrogen atom, a (C.sub.1-6)alkyl group, a halo(C.sub.1-6)alkyl group, a (C.sub.2-6)alkenyl group or a (C.sub.2-6)alkynyl group, and Y.sup.2 is --O--, --S-- or --NH--),--COOCH(R.sup.4)CO--Y.sup.1 R.sup.5(wherein R.sup.4, R.sup.5 and Y.sup.1 are as defined above), or --COOR.sup.6(wherein R.sup.6 is a (C.sub.1-6)alkyl group, a halo(C.sub.1-6)alkyl group, a (C.sub.2-6)alkenyl group or a (C.sub.2-6)alkynyl group,R.sup.1 is a (C.sub.1-6)alkyl group, R.sup.2 is a hydrogen atom, (C.sub.1-6)alkyl group or a halo (C.sub.1-6)alkyl group, X.sup.1 and X.sup.2, which may be the same or different, are halogen atoms,Y is --O--, --S--, --SO--, --SO.sub.2 --, or --NH--, and n is an integer of 0 or 1.