The field efficacy test of 9 fungicides on Pitaya Anthracnose（Colletotrichum gloeosporioides）

The field efficacy test was conducted for screening efficient and safe fungicides against Pitaya Anthracnose（ Colletotrichum gloeosporioides）. The results showed that by spraying 1 500 times 10% difennoconanose WG and 1 500 times 50% prochloraz WP against Pitaya Anthracnose，the control effects reached 77%. Bordeaux mixture（ the ratio of CuSO4，CaO and H2O is 1∶1∶100） come second，after three times of application，the control effect of Bordeaux mixture against Pitaya Anthracnose reached 66.67%，which had no significant difference with that of 1 500 times 10% difenoconazole WG and 1 500 times 50% prochloraz WP at the significant level of 0.05 and 0.01. So we could use 1 500 times 10% difenoconazole WG and 1 500 times 50% prochloraz WP alternately to prevent Pitaya Anthracnose in field production. Pitaya was sensitive to lime-suffer and Bordeaux mixture，those two fungicides should be used cautiously in field production ，especially during reproductive growth stage.