Use of 1-phenyl pyrazole derivatives as aphicides against Toxoptera aphids

摘要

Use of 1-phenyl pyrazole compounds (I) for protection of citrus fruit crops against Toxoptera aphids is new. (I) is preferably of formula (Ia). R1 = CN or methyl; R2 = S(O)nR3; R3 = alkyl or haloalkyl; R4 = H, halo, NR5R6, S(O)mR7, C(O)R7, alkyl, haloalkyl, OR8 or -N=C(R9)(R10); R5, R6 = H, alkyl, haloalkyl, C(O)alkyl or S(O)rCF3; or R5+ R6 = alkylene (optionally interrupted by one or two heteroatoms e.g. O or S); R7 = alkyl or haloalkyl; R8 = alkyl, haloalkyl, or H; R9 = alkyl or H; R10 = phenyl or heteroaryl (optionally substituted by one or more halo, OH, alkoxy, alkylthio, CN or alkyl); R11, R12 = H or halo; R13 = halo, haloalkyl, haloalkoxy, S(O)qCF3, or SF5; m, n, q, r = 0- 2; X = N or C-R12 provided that when R1 is methyl, then R3 is haloalkyl, R4 = NH2, R11 =Cl, R13 = CF3, and X = N.