NOVELTY - A pyrazole derivative (I), its salt and/or N-oxide is new.    USE - For controlling or preventing an infestation of plants, propagation material of it, harvested crops or non-living materials by phytopathogenic or spoilage microorganisms or organisms potentially harmful to man (claimed); used in agriculture or horticulture for controlling or preventing infestation of plants, harvested food crops, seeds or non-living materials (such as lumbar, wall boards and paint) by phytopathogenic microorganisms, preferably fungi; and for controlling plant pests or on non-living materials for control of spoilage microorganisms or organisms potentially harmful to man.    ADVANTAGE - The compound has excellent activity at low rates of application, is environmentally safe, and has very curative, preventive and systemic properties.    DETAILED DESCRIPTION - A pyrazole derivative of formula (I), its salt and/or N-oxide is new.    G'=O or S;    T'=CR13 or N;    Y1, Y2, Y3 and Y4=CR14 or N;    Q'=-C(=O)-z, -C(=S)-z, -C(=O)-O-z, -C(=O)-N(R15)-z or -C(=S)-N(R16)-z;    z=bond connected to R12;    n=1 or 2;    p=1 or 2;    R1-R10, R13 and R14=H, halo, cyano, 1-4C alkyl or 1-4C haloalkyl;    R11, R15 and R16=H, 1-4C alkyl, 3-5C cycloalkyl or 1-4C alkoxy;    R12=(hetero)aryl, (hetero)arylalkyl (both optionally substituted by R29), or a group of formulae (A) or (B);    A'=C(R18R19), C(=O), C(=S), NR24, O or S;    X1=C(R20R21), C(=O), C(=S), NR24, O or S;    X2=C(R22R23), C(=O), C(=S), NR24, O or S;    R17=hydroxyl, O-M+, OC(=O)R28, amino or NHR25;    M+=metal cation or ammonium cation;    R18-R23=1-8C alkyl, 2-8C alkenyl, 2-8C alkynyl, 3-8C cycloalkyl, 1-8C alkoxy, (hetero)aryl (all optionally substituted by R26), H, halo, hydroxyl, amino, cyano, 1-8C alkylthio, 1-8C alkylsulfonyl, 1-8C alkylsulfinyl, or NHR25;    R18+R19, R20+R21, and R22+R23=saturated three- to six-membered alicyclic or heterocyclic ring (optionally substituted by R27);    R18+R20 and R21+R22=saturated or partially unsaturated four- to seven-membered alicyclic or heterocyclic ring (optionally substituted by R27);    R18+R22=saturated or partially unsaturated four- to seven-membered alicyclic or heterocyclic ring (optionally substituted by R27);    R24 and R25=H, 1-8C alkyl, 1-8C haloalkyl 2-8C alkenyl, 1-8C haloalkenyl 2-8C alkynyl, 2-8C haloalkynyl, 3-8C cycloalkyl, 3-8C halocycloalkyl, 1-8C alkoxy, 1-8C haloalkoxy, 1-8C alkylcarbonyl, 1-8C haloalkylcarbonyl, 1-8C alkylsulfonyl, 1-8C haloalkylsulfonyl, amino, NH(1-8C alkyl), N(1-8C alkyl)2, aryl or heterocycyl (both optionally substituted by R27);    R26=halo, cyano, amino, nitro, hydroxyl, mercapto, 1-8C alkyl, 2-8C alkenyl, 2-8C alkynyl, 3-8C cycloalkyl, 3-8C cycloalkyl-1-4C alkyl, 3-8C cycloalkyl-1-4C alkyloxy, 3-8C cycloalkyl-1-4C alkylthio, 1-8C alkoxy, 3-8C cycloalkyloxy, 1-8C alkenyloxy, 2-8C alkynyloxy, 1-8C alkylthio, 1-8C alkylsulfonyl, 1-8C alkylsulfinyl, 3-8C cycloalkylthio, 3-8C cycloalkylsulfonyl, 3-8C cycloalkylsulfinyl, aryl, aryloxy, arylthio, arylsulfonyl, arylsulfinyl, aryl-1-4C alkyl, aryl-1-4C alkyloxy, aryl-1-4C alkylthio, heterocyclyl, heterocycyl-1-4C alkyl, heterocycyl-1-4C alkyloxy, heterocyclyl-1-4C alkylthio, NH(1-8C alkyl), N(1-8C alkyl)2, 1-4C alkylcarbonyl, 3-8C cycloalkylcarbonyl, 2-8C alkenylcarbonyl, 2-8C alkynylcarbonyl (where alkyl, alkenyl, alkynyl, cycloalkyl, alkoxy, alkenyloxy, alkynyloxy or cycloalkoxy are optionally substituted by halo, and aryl and heterocyclyl are optionally substituted by R27);    R27=halo, cyano, 1-4C alkyl, 1-4C haloalkyl, 1-4C alkoxy or 1-4C haloalkoxy;    R28=1-6C alkyl or 1-6C alkoxy;    R29=halo, hydroxyl, cyano, mercapto, nitro, 1-4C alkyl, 1-4C haloalkyl, 1-4C alkoxy, 1-4C haloalkoxy, 1-4C alkylthio, N(R30)2, phenyl or heteroaryl (both optionally substituted by halo, cyano, 1-4C alkyl, 1-4C haloalkyl, 1-4C alkoxy or 1-4C haloalkoxy);    R30=H, cyano, 1-4C alkyl, 1-4C alkylcarbonyl, 1-4C haloalkylcarbonyl, 1-4C alkylsulfonyl or 1-4C haloalkylsulfonyl);    e=1 or 2;    q=1-3;    m=0 or 1.    Provided that:    (1) when n is 2, then p is 1; and    (2) when m is 1, then X1 and X2 cannot both be O.    INDEPENDENT CLAIMS are included for the following:    (1) new intermediate compounds of formulae (II), (III), (V), (VI), (IX), (XIII), their salts and/or N-oxide;    (2) a fungicidal composition comprising the compound (I) and an carrier, optionally comprising an adjuvant, and optionally comprising at least one additional pesticidally active compounds; and    (3) controlling or preventing an infestation of plants, propagation material of it, harvested crops or non-living materials by phytopathogenic or spoilage microorganisms or organisms potentially harmful to man, comprising applying the compound (I) to the plant, to parts of the plants or to the locus of it, to propagation material and/or to any part of the non-living materials.    A1=H, protecting group or group of formula (i).