Impact of neem-nanoemulsion and neem petroleum ether extract on some biological parameters of the internal parasitoid, Meteorus gyrator (Thub.) (Hymenoptera: Braconidae)

Abstract

Abstract Background The neem tree, Azadirachta indica, is very promising for the control of many insect pests, where it acting as feeding deterrents, oviposition obstruction and as a growth regulator. Results In this study, both neem extract and neem nanoemulsion significantly decreased the adult emergence of Meteorus gyrator. It was found that all concentrations of neem nanoemulsion especially high concentrations (800, 400, and 200 ppm) have adversely affected some biological parameters of this parasitoid. Also, they have a harmful effect as reducing fecundity, oviposition, and shortened the longevity of M. gyrator. Conclusion It has been proved that neem nanoemulsion is more harmful than neem oil extract for the hymenopteran parasitoid M. gyrator.