Toxicity Measurement and Field Control Effect of Four New Insecticides on Hyphantria cunea(Drury)Larvae
Hyphantria cunea(Drury)is an important invasive pest insect in China,and chemical control is still an important method to quickly control its population spread and outbreak.To screen for efficient and formulations that can prevent and control the H.cunea in production practice,we studied and determined the toxicity and field control effectiveness of four new environment-friendly biopesticides:4.5％beta-cypermethrin,10％lambda-cyhalothrin,5％femamectin bennzoat hexaflumuron,and 25％chlorbenzuron against H.cunea larvae.The results of toxicity test at 48 h in laboratory showed that the highest corrected mortality rate of H.cunea larvae of 3rd instar was 5％femamectin bennzoat·hexaflumuron-treated,followed by 25％chlorbenzuron,10％lambda-cyhalothrin and 4.5％beta-cypermethrin.The field efficacy test results of four pesticides showed that 10％lambda-cyhalothrin had the best control effect at 24 h,followed by 5％femamectin bennzoat·hexaflumuron.Considering that chlorbenzuron was stable although it took longer to exert its efficacy,we recommended that the three tested insecticides except for 4.5％beta-cypermethrin could be used to control H.cunea larvae in the field.
Hyphantria cuneabio-insecticidetoxicity measurementfield control efficacy
NETL
NSTL
万方数据
