Preimaginal development and fecundity of Gaeolaelaps aculeifer (Acari: Laelapidae) feeding on Rhizoglyphus echinopus (Acari: Acaridae) at constant temperatures

The laelapid mite, Gaeolaelapsaculeifer (Canestrini) is widespread in soil habitats and feeds on different small arthropods, fungi and nematodes. The development and fecundity of G. aculeifer feeding on Rhizoglyphus echinopus (Fumouze & Robin) as prey was studied at eight different constant temperatures which include: ۱۶, ۱۷.۵, ۲۰, ۲۲.۵, ۲۵, ۲۷.۵, ۳۰ and ۳۲.۵ ºC, with relative humidity of ۶۰ ± ۵%, and a ۱۶:۸ h (Light: Dark) photoperiod. The results showed that the development time of immature stages were ۳۰.۸۰ ± ۰.۶۸, ۳۰.۵۷ ± ۰.۴۲ days at ۱۶ °C; ۸.۶۶ ± ۰.۰۹, ۸.۲۰ ± ۰.۱۸ days at ۳۰ °C and ۹.۸۶ ± ۰.۱۹, ۹.۷۷ ± ۰.۲۲ days at ۳۲.۵ °C for females and males, respectively. The pre-oviposition period considerably varied from ۷.۶۰ ± ۳.۰۲ days at ۱۶ °C to ۰.۸۱ ± ۰.۰۹ days at ۳۰ °C and then increased to ۲.۰۷ ± ۰.۲۵ days at ۳۲.۵ °C. The oviposition period decreased with increasing temperature from ۳۶.۹۳ ± ۲.۶۶ days at ۲۰ °C to ۱۷.۶۷ ± ۱.۹۰days at ۳۲.۵ °C. The average life span of females was ۱۰۲.۴۰ ± ۸.۰۸ days at ۱۶ °C and ۳۷.۲۱ ± ۱.۹۸ days at ۳۲.۵ °C. The mean daily oviposition per female increased from ۰.۴۹ ± ۰.۱۴ at ۱۶ °C to ۳.۷۶ ± ۰.۱۳ at ۳۰ °C and decreased to ۱.۸۸ ± ۰.۱۵ at ۳۲.۵ °C.

کلیدواژه ها:

bulb mite ، immature ، oviposition ، Predator ، longevity