Determination of laboratory toxicity and control effect of five insecticides against Pratylenchus thornei
[Objective]The study was performed to screen out the effective agents to prevent and control Prat-ylenchus thornei,so as to provide references for scientific control of this disease in oat safe production.[Method]The toxicity and control effect of five insecticides against P. thornei were determined by immersion method and pot root ir-rigation method respectively under indoor conditions.[Result]Among the five agents,41.7％ fluopyram SC showed the strongest toxicity to P. thornei with LC50 of 1.1157 mg/L. The EW toxicity of 2.5％ lambda-Cyhalothrin was the lowest,and LC50 was 68.4545 mg/L. After 41.7％ fluopyram SC and 40％ fluensulfone EC for 45 days of root irrigation,the reduction rates of P. thornei were 94.07％ and 97.07％,and the control effects were 84.67％ and 92.42％,respectively.[Conclusion]41.7％ fluopyram SC and 40％ fluensulfone EC showed the best control effect against P. thornei,suggesting that they should be popularized in oat production.
万方数据
维普
