[Objective]The paper was to screen pesticide that could effectively control Latoia pastorlis （Butler）, and provide reference for its utilization in fields. [Method]The indoor control efficacy of 25% benzoylphenal ur...[Objective]The paper was to screen pesticide that could effectively control Latoia pastorlis （Butler）, and provide reference for its utilization in fields. [Method]The indoor control efficacy of 25% benzoylphenal urea, 30% trichlorfon, 16 000 IU/mg Bacillus thuringiensis and Beauveria bassiana on 2-3 instars larvae of L. pastorlis were determined, and the indoor toxicity of 25% benzoylphenal urea and crystal trichlorfon on shrimp was also tested. [Result]Four pesticides all had insecticidal effects on 2-3 instars larvae of L. pastorlis, of which 30% trichlorfon 800, 1 000 and 1 500 times and 25% benzoylphenal urea 800 times had the best control effect. Crystal trichlorfon with the concentrations of 0.500, 0.100, 0.010 mg/L and 25% benzoylphenal urea 8 000, 10 000, 15 000 times had little or no impact on shrimp, respectively.[Conclusion] 30% Trichlorfon was rapidly available with small impact on shrimp, which were suitable for emergency use or daily control of L. pastorlis. 25% Benzoylphenal urea and 16 000 IU/mg B. thuringiensis had relatively slow insecticidal effect, which was suitable for daily control of L. pastorlis.展开更多
基金Supported by Research Projects of Guangxi Academy of Forestry[GLKZ(2009)No.12]
文摘[Objective]The paper was to screen pesticide that could effectively control Latoia pastorlis （Butler）, and provide reference for its utilization in fields. [Method]The indoor control efficacy of 25% benzoylphenal urea, 30% trichlorfon, 16 000 IU/mg Bacillus thuringiensis and Beauveria bassiana on 2-3 instars larvae of L. pastorlis were determined, and the indoor toxicity of 25% benzoylphenal urea and crystal trichlorfon on shrimp was also tested. [Result]Four pesticides all had insecticidal effects on 2-3 instars larvae of L. pastorlis, of which 30% trichlorfon 800, 1 000 and 1 500 times and 25% benzoylphenal urea 800 times had the best control effect. Crystal trichlorfon with the concentrations of 0.500, 0.100, 0.010 mg/L and 25% benzoylphenal urea 8 000, 10 000, 15 000 times had little or no impact on shrimp, respectively.[Conclusion] 30% Trichlorfon was rapidly available with small impact on shrimp, which were suitable for emergency use or daily control of L. pastorlis. 25% Benzoylphenal urea and 16 000 IU/mg B. thuringiensis had relatively slow insecticidal effect, which was suitable for daily control of L. pastorlis.
