蒲螨生物学习性及对椰心叶甲龄期选择性的初步研究

Host age preference and biology of Pyemotes sp.(Acari:Pyemotidae)

在室内温度(25±2)℃,光周期L∥D=12h∥12h,相对湿度(75±10)%条件下,对蒲螨的寄生行为、其对寄主龄期的选择性、膨腹体的发育过程以及世代生活史进行观察。结果表明:在室内蒲螨能很好地找寻寄主并寄生。平均每头雌螨一生产雌43.31头,产雄4.82头,产子期14.06d,寿命为21.21d。蒲螨对椰心叶甲各龄期的选择性达极显著差异,最喜欢寄生蛹,选择寄生率达到96.67%;其次是5龄幼虫,寄生率为60.00%;1龄幼虫的寄生率最低,只有10.00%。

The parasitic behavior, selectivity of host age, abdominal swelling and life cycle of Pyernotes sp. on Brontispa longissima （Gestro） were studied at （25±2）℃ ,L//D=12 hours//12 hours and 75% ±10% RH in the laboratory. The results showed that mites could find and parasitize a host easily. The mean production of Pyemotes sp. was 43.21 female and 4.82 male mites, respectively. The mean durations of reproduction and life expectancy were 14.06 days and 21.21days, respectively. Selectivity of host age differed significantly among leaf beetle instars. The highest parasitic rate was 96.67%, on pupae, and secondly, 60.00% on the 5th instar larvae, and those on the other instar larvae were similar.