Control efficacy of different molluscicides on Ampullaria gigas in lotus field

Control efficacy of different molluscicides on Ampullaria gigas in lotus field were detected in order to effectively reduce the damage of Ampullaria gigas. The results showed that the 40 g 70% Niclosamide wettable power per 667 m² had the most efficient function, the control efficacy was 89.71%, 98.25% respectively when treated for 7 and 15 days, and the efficacy period lasted long, which was 99.5% after treatment for 22 days. The treatment 50 g 70% Niclosamide ethanolamine salt wettable power per 667 m² also had the better control efficacy, which was 81.62%, 94.90%, 95.95% respectively when treated for 7, 15, 22 days. Therefore the 70% Niclosamide wettable power and 70% Niclosamide ethanolamine salt wettable power were recommended to be used alternately to control Ampullaria gigas.