Effect of Neem Azal (Azadirachta indica) Extracts on the Mortality and Fecundity of Hyalomma dromedraii Females

Abstract

Effect of the two Neem , A:::adirachta indica extracts, Neem Azal F and T on fed Hylomma dromedarii (Koch) females and their fecundity under laboratory conditions was studied. Females mortality rate increased gradually as Neem extract concentrati on increased (i.e. 0.2 to 0.8%). The LC 50 values were 0.8 and 0. 6% post treatment ofNeem Azal F and T, respectively at the l I th day . Treated females laid fewer eggs than those of the control'. The concentrations 0.2, 0.4, 0.6 and 0.8% ofNeem extract decreased the percentage of hatching eggs from (46.38 to 10.56) and (35.4 to 8.42) and increased the larval mortality rate from (56.46 to 80.34) and from 87.1 5 to 94.53 for Neem Azal F and T, respectively.