Toxicity of Lavandula angustifolia oil constituents and spray formulations to insecticide‐susceptible and pyrethroid‐resistant Plutella xylostella and its endoparasitoid Cotesia glomerata

摘要: Background Plutella xylostella is one of the most serious insect pests cruciferous crops. This study was conducted to determine toxicity 21 constituents from Lavandula angustifolia essential oil (LA-EO) and another 16 previously known LA-EO six experimental spray formulations containing (1-6 g L(-1) sprays) susceptible KS-PX pyrethroid-resistant JJ-PX P. larvae, as well its endoparasitoid Cotesia glomerata adults. Results Linalool linalool oxide (LC50 = 0.016 mg cm(-3) ) were toxic fumigant compounds 10.7-fold less than dichlorvos larvae. Either residual or these almost identical against larvae either two strains. Against C. glomerata, 7 × 10(-6) insecticide. ∼1430 times dichlorvos. The applied 6 emamectin benzoate 21.5 emulsifiable concentrate provided 100% mortality Conclusion Reasonable control in greenhouses can be achieved by a formulation potential contact-action fumigant. © 2015 Society Chemical Industry.