伪钝绥螨的花粉饲养研究

在饲养伪钝绥螨的10种植物花粉中,核桃、洋槐、贴梗海棠、仙人球、迎春和卷心菜等可使其取食并完成发育,前4种还可使其产卵。花粉粒的外部形态结构,是影响该螨能否取食的重要因素之一。用桃、苹果花粉饲养伪钝绥螨,对其F_1代生活力有明显的不良影响。取食桃花粉的F_1代,幼螨间相互残杀,并取食未孵化的卵,使成活率降低。取食苹果花粉的F_1代可正常完成发育,但成螨性比降低,产卵时自食其卵。试验表明,单纯喂食桃或苹果花粉难以进行伪钝绥螨的累代饲养。

REARING OF THE PREDACIOUS MITE, AMBLYSEIUS FALLACIS (GERMAN) CACARI:PHYTOSEIIDAE] WITH PLANT POLLEN

When the pollen of 10 plant species was fed to A. fallacis in the laboratory, four of which, namely Juglans regia, Robinia pseudoacacia, Chaenomeles speciosa and Mammillaria sp., supported the development and reproduction of the predator, while two species, Jasminum nudiflorum and Brassica oleracea, supported only the complete development. Surface structure of the pollen grains was found to be one of the major factors affecting the feeding behavior of the predator. Some pollen grains with spiny covering were unfavorable to the predator's feeding. The hatchability and nymph survival rate on peach pollen were 98.2% and 27.6% when reared individually, and 78.0% and 9.4 in the mass rearings. Although peach or apple pollen could support normal development of the predator, feeding on these pollens by the F1 generation nymphs resulted in cannibalism, reduced survival and low female rate in the sex ratio.