In vitro acaricidal effect of Melia azedarach and Artemisia herba- alba extracts on Hyalomma dromedarii (Acari: Ixodidae): embryonated eggs and engorged nymphs

摘要: The present study aimed to evaluate the in vitro efficacy of four medicinal plant extracts: petroleum ether and ethyl alcohol extracts ripen fruits Melia azedarach whole aerial parts Artemisia herba-alba against two inactive stages camel tick Hyalomma dromedarii, embryonated eggs engorged nymphs comparison reference acaricide Butox®5.0 (Deltamethrin). Egg nymphal immersion tests at concentrations with three replicates were used. deformity larvae hatched from treated adults moulted observed photographed by light microscope (LM) scanning electron (SEM). results showed that M. A. revealed higher significant toxic effects on comparing (Butox®5.0) control. In egg emmersion test, LC50 was 3.14 3.91%, respectively respective 1.77 2.45%. 0.26 1%, respectively, 4.17 8.7%. Abnormalities LM SEM as incomplete development legs mouth well shrinkage mainly mouthparts emerged nymphs. conclusion, all plants have great potential be developed a novel acaricidal for controlling H. respectively.