The field experiment results showed that 250 g/l mandipropamid suspension had good control effect on red taro blight,and the 1∶1500 suspension was applied twice continuously during the early period( June 25) and culmination period( July 12) of taro blight; the control effect 23 d after the last application reached 79. 28%,significantly better than that of conventional pesticide,and it was safe,so it had good prospects for the development and application in production. The field experiment results showed that 250 g / l mandipropamid suspension had good control effect on red taro blight, and the 1: 1500 suspension was applied twice continuously during the early period (June 25) and culmination period (July 12) of taro blight; the control effect 23 d after the last application reached 79. 28%, significantly better than that of conventional pesticide, and it was safe, so it had good prospects for the development and application in production.