Abstract: Colletotrichum sp isolated from Photinia serrulata was identified as Colletotrichum gloeosporioides based on its morphological and molecular characteristics The antifungal activities of 14 fungicides against C gloeosporioides were determined by mycelium growth rate method Four of these fungicides were primarily screened， and their toxic effects on Cgloeosporioides were tested， respectively The results showed that 25％ Prochloraz EC exhibited significant inhibition activity at concentration of 000004 μg·mL-1，then is Prochloraz EC (450 g·L-1) at concentration of 0.00005 μg·mL-1，Prochloraz EW (450 g·L-1) at concentration of 0.00018 μg·mL-1， and 50% prochlorazmanganese WP at concentraion of 0.2554 μg·mL-1.

Key words: Photinia serrulata, Colletotrichum gloeosporioides, toxicity test