Effect of Lantana camara essential oil on embryogenesis and postembryonic development of the blowfly, Chrysomya megacephala (Diptera: Calliphoridae) following egg treatment
2022
Maddheshiya, Rahul | Singh, K. P.
Chrysomya megacephala is a vector for many pathogens and causes myiasis in vertebrates. In the present investigation, essential oil (EO) of Lantana camara was analysed by GC-MS to determine its chemical composition. Furthermore, this oil was tested against the eggs of C. megacephala to examine its ovicidal effect. Compositional analysis of EO revealed major components in the EO were α- pinene, caryophyllene, Geranyl acetate, and eucalyptol. Results of the contact toxicity are encouraging, as this EO proved fatal against blowfly eggs at 1 and 2 µl doses in a dose-dependent manner. Latent effects were also noticed in the progeny eclosed from treated eggs, leading to larval and pupal toxicity, reduced pupariation, pupal-adult intermediate formation, and suppressed emergence. We also report for the first time about the juvenoid nature of L. camara oil. Our result on the significant negative effects of L. camara EO on C. megacephala embryonic survival suggests that it can be considered in future designs of green pesticides against dipterans.
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