Effect of Chlorantraniliprole and Other Seed Treatment Agents on the Control of Spodoptera frugiperda
[Objective]To explore the control effect of seed treatment on Spodoptera frugiperda,and provide a basis for scientific prevention and control of Spodoptera frugiperda.[Method] The safety of several seed treatment agents such as 50％ chlorpyrifos and benzamide on corn, the toxic effect of leaves at different stages after seed dressing on Spodoptera frugiperda,and the field control effect were tested.Finally,the yield of corn was measured.[Result] The emergence rate of corn after seed dressing treatment was significantly higher than that of the blank control, and the seed dressing agent had a promoting effect on corn emergence.After 7 days of feeding and sowing,the newly hatched larvae of the grass-land snout moth fed on the corn leaves of each treatment.As the feeding time prolonged,the mortality rate increased.After 72 hours,the mortali-ty rate of the treatments with chlorpyrifos and bromoyl · thiamethoxam reached 100％.After 14 days of feeding and sowing,the mortality rate of the corn leaves of each treatment decreased compared to 7 days;On the 14th,21st,and 55th days after sowing,the field control effect of each seed treatment on the Spodoptera frugiperda decreased over time.The 50％ chloramphenicol treatment showed stable performance,while on the 21st day after sowing,the insecticidal and control effects of the 50％ chloramphenicol 1590 g/100 kg seed and 1060 g/100 kg seed treatments remained above 80％.The 40％ bromoyl · thiamethoxam treatment had a good initial effect,but the later effect was less significant.[Conclu-sion] Seed dressing with chemicals can effectively control the occurrence and harm of Spodoptera frugiperda in the early growth stage of maize. On 55 d after sowing,the occurrence of Spodoptera frugiperda cannot be effectively controlled by seed treatment alone. In the middle and late stages,it still needs to be combined with stem and leaf spray to effectively control Spodoptera frugiperda.
万方数据
维普
