Oil-based suspension concentrate (A) comprises: at least one substituted heteroaryl compound (I), that is solid at room temperature, in form its isomeric mixture or pure isomer； at least one penetration promoter, which is an alkanol-alkoxylate compound (II)； at least one vegetable oil； at least one non-ionic surfactant comprising polyethyleneoxide-polypropyleneoxide-4-butoxybuthylether, polyethyleneglycolether of linear alcohols and/or conversion products of fatty acids with ethylene oxide； and/or at least one anionic surfactant. Oil-based suspension concentrate (A) comprises: at least one substituted heteroaryl compound of formula (I), that is solid at room temperature, in form its isomeric mixture or pure isomer； at least one penetration promoter, which is an alkanol-alkoxylate compound of formula (R 8>；-O-(EO) p-(PO) q-R 9>；) (II)； at least one vegetable oil； at least one non-ionic surfactant comprising polyethyleneoxide-polypropyleneoxide-4-butoxybuthylether, polyethyleneglycolether of linear alcohols and/or conversion products of fatty acids with ethylene oxide； and/or at least one anionic surfactant. X : halo, alkyl, alkoxy, haloalkyl, haloalkoxy or CN； W 1>；, Y 1>；, Z : H, halo, alkyl, alkoxy, haloalkyl, haloalkoxy or CN； either A : alkyl or alkoxyalkyl (both optionally substituted by halo), H or saturated optionally substituted cycloalkyl, in which optionally at least a ring atom is replaced by heteroatom； and B 1>；H or alkyl； or CAB 1>；optionally saturated, and substituted cycle (optionally containing at least one heteroatom)； D : NH or O； G : H, -C(=O)-R 1>；, -C(=L)-M-R 2>；, -SO 2-R 3>；, -P(=L)(R 4>；)-(R 5>；), E or -C(=L)-N(R 6>；)-R 7>；； E : metal ion or ammonium ion； L, M : O or S； R 1>；alkyl, alkenyl, alkoxyalkyl, alkylthioalkyl or polyalkoxyalkyl (all optionally substituted by halo), cycloalkyl (optionally substituted by halo, alkyl or alkoxy, and interrupted by at least one heteroatom), or phenyl, phenyl alkyl, hetaryl, phen
