东方钝绥螨生物学及食量研究

东方钝绥螨在昌黎地区每年大约发生23代左右。平均卵期1.8天,幼虫期0.7天、第一若虫期1.0天、第二若虫期1.5天、产卵前期4.6天、产卵期15.2天、雌成螨期20.5天、雄成螨期15.6天、生命周期为25.5天。平均日产卵量1.5粒,总卵量16粒。雌成螨日捕食山楂叶螨卵3粒及若螨0.46头,总捕食量为卵91粒,若螨43头及成山楂叶螨14头,对苹果全爪螨捕食量3.4头(雌成螨)。

RESEARCH ON THE BIOLOGY AND FOODS OF AMBLYSEIUS ORIENTALIS

The predatory mite,Amblyseius orientalis Ehara,usually appears about 23 generatons in a year in Changli,Hebei Province. Each development stages of predatory mite is as follows:eggs,1.8 days:larvae,0.7 days:drotnymph,1.0 days;deutonymph,1.5 days; earlier oviposition,4.6 days;laying eggs,15.2days;2.5 days of the female mite,and 15.6 days of the male nuago mite.1.5 eggs are oviposited by an A.oriertalis female in a day,and there are 16 eggs in a generation.It feeds 1.5 eggs of the leaf mites,T.vie- nnensis and 0.5 nymph mites per day,3.4 adult female mites of the P.ulmi in a day, The total foods of each predator,A.orientalis is 91 eggs,44 nymphs,and 14 adult female mites of the T.viennensis in one generation.