Pathogen identification of anthracnose of Photinia serrulata and lab screening of fungicides

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.