Patent ID: 8207207

Claim:
A method of controlling or preventing infestation of plants by phytopathogenic microorganisms, wherein a compound of formula (I): where Het is a 5- or 6-membered heterocyclic ring containing one to three heteroatoms, each independently selected from oxygen, nitrogen and sulphur, the ring being substituted by the groups R 6 , R 7 and R 8 ; R 1 is hydrogen, C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 alkoxy, C 1-4 haloalkoxy, CH 2 C≡CR 9 , CH 2 CR 10 ═CHR 11 , CH═C═CH 2 or COR 12 ; R 2 and R 3 are each, independently, hydrogen, halo, C 1-4 alkyl, C 1-4 alkoxy, C 1-4 haloalkyl or C 1-4 haloalkoxy; R 4 and R 5 are each independently selected from halo, cyano and nitro; or one of R 4 and R 5 is hydrogen and the other is selected from halo, cyano and nitro; R 6 , R 7 and R 8 are each, independently, hydrogen, halo, cyano, nitro, C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 alkoxy(C 1-4 alkyl, C 1-4 haloalkoxy(C 1-4 )alkyl or C 1-4 haloalkoxy, provided that at least one of R 6 , R 7 and R 8 is not hydrogen; R 9 , R 10 and R 11 are each, independently, hydrogen, halo, C 1-4 alkyl, C 1-4 haloalkyl or C 1-4 alkoxy(C 1-4 )alkyl; and R 12 is hydrogen, C 1-6 alkyl, C 1-6 haloalkyl, C 1-4 alkoxy(C 1-4 )alkyl, C 1-4 alkylthio(C 1-4 )alkyl, C 1-4 alkoxy or aryl is applied to the plant, to parts thereof, or the locus there of.