6-Phenyl-7-aminotriazolopyrimidines of the formula I in which the substituents are as defined below: R1 is hydrogen, alkyl, haloalkyl, cycloalkyl, halocycloalkyl, alkenyl, haloalkenyl, cycloalkenyl, halocycloalkenyl, alkynyl, haloalkynyl or phenyl, naphthyl, or a five- or six-membered saturated, partially unsaturated or aromatic heterocycle, which comprises one to four heteroatoms from the group consisting of O, N and S, R2 is alkyl, haloalkyl, cycloalkyl, halocycloalkyl, alkenyl, haloalkenyl, cycloalkenyl, halocycloalkenyl, alkynyl, haloalkynyl or phenyl, naphthyl, or a five- or six-membered saturated, partially unsaturated or aromatic heterocycle which comprises one to four heteroatoms from the group consisting of O, N and S, R3,R4,R5,R6,R7 are hydrogen or one of the groups mentioned under R2, R4, together with R3 or R6, may also form a five- or six-membered saturated or unsaturated ring which, in addition to carbon atoms, may comprise one to three further heteroatoms from the group consisting of O, N and S as ring members; R2 with R3, R4 with R5, R6 with R7 may in each case together, with formation of spiro groups, also form a C2-C5-alkylene, or alkenylene or alkynylene chain which may be interrupted by one to three heteroatoms from the group consisting of O, N and S; p is zero or 1; L is halogen, alkyl, haloalkyl, alkoxy, cyano, nitro, amino, alkylamino, dialkylamino, alkylcarbonylamino, C(O)—R, S(O)n—R; where n is zero, 1 or 2; R is hydrogen, alkyl, haloalkyl, alkoxy, alkenyloxy, alkynyloxy, amino, alkylamino, dialkylamino; m is 1, 2, 3, 4 or 5; X is halogen, cyano, alkyl, alkoxy, alkenyloxy, alkynyloxy or haloalkoxy; Y is oxygen or sulfur; Z is hydrogen, alkyl, haloalkyl, cycloalkyl, alkylcarbonyl, cycloalkylcarbonyl, alkenyl, haloalkenyl, cycloalkenyl, alkynyl, haloalkynyl, phenyl, naphthyl, a five- to ten-membered saturated, partially unsaturated or aromatic heterocycle which comprises one to four heteroatoms from the group consisting of O, N and S; or Z together with R4 or R6 may also form a five- or six-membered saturated or unsaturated ring which, in addition to carbon atoms and Y, may comprise one or two further heteroatoms from the group consisting of O, N and S as ring members the groups R1 to R7, Z and R may be substituted according to the description; processes for preparing these compounds, compositions comprising them and their use for controlling phytopathogenic harmful fungi.