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室内比较了寄生烟粉虱Bemisia tabaci的两种寄生蜂---丽蚜小蜂Encarsia formosa和浅黄恩蚜小蜂En.sophia的生物学特性,并研究了以烟粉虱为寄主时两种寄生蜂间的竞争关系。结果表明:两者的后足胫节长度间无显著差异。浅黄恩蚜小蜂的产卵器及卵均长于丽蚜小蜂的,但浅黄恩蚜小蜂的待产卵量显著少于丽蚜小蜂。浅黄恩蚜小蜂检测寄主所花时间短于丽蚜小蜂,但检查圈数显著多于丽蚜小蜂,产卵时间以丽蚜小蜂所花时间为多。以4龄初期的烟粉虱为寄主时,丽蚜小蜂的卵期为48h,而浅黄恩蚜小蜂24h即完成卵期的发育。后者的蛹历期也显著短于丽蚜小蜂的蛹历期。丽蚜小蜂由卵到成虫的总发育历期比浅黄恩蚜小蜂的要长72h左右。一头丽蚜小蜂与一头浅黄恩蚜小蜂组合后的总产卵量为14.0粒,略高于两头丽蚜小蜂组合的总产卵量(10.2粒),显著高于两头浅黄恩蚜小蜂组合的产卵量(9.5粒);两种蜂组合的处理中被寄生寄主体内的着卵量为1.73粒,显著高于单独一种蜂组合中被寄生寄主的着卵量,后两者分别为1.29和1.39粒。在寄主竞争情况下,在被两种蜂均寄生的寄主体内丽蚜小蜂和浅黄恩蚜小蜂产入的卵量分别为1.21和1.43粒,显著高于仅被一种蜂寄生的寄主体内的对应蜂种的卵量,后者分别为1.06和1.19粒。结果提示两种蜂均能识别对方的存在,且浅黄恩蚜小蜂表现出更强的竞争能力。
The biological characteristics of Encarsia formosa and En.sophia, a parasitic wasp of Bemisia tabaci, were compared in the laboratory. Two kinds of parasites The competition between bees. The results showed that there was no significant difference between the two hind tibia lengths. Ovipositlus apenicularis oviposition eggs and eggs were longer than the aphid wasps, but the yellow aphid wasps to be less than the oviposition of aphid wasps. The time taken for the host to test the A. napus was shorter than that for the A. ramosissima, but the number of inspection cycles was significantly more than that for the A. ramosissima. In the early 4 instar, B. tabaci were host, the ovipositing stage was 48h, while the larval aphid wasp completed the ovipositing stage 24h. The latter also had a significantly shorter pupal duration than the pupal stage of the aphid larvae. The aphid wasps from egg to adult total development period than the yellow aphid wasp 72h long. The total fecundity of aphid larvae combined with a small yellow aphid wasp was 14.0, slightly higher than the total number of fecundity (10.2) in the combination of the two aphid larvae, which was significantly higher than that of the two yellow females The number of eggs laid by the bee-comb combination (9.5 grains) was 1.73, which was significantly higher than the number of eggs laid by parasitic hosts in the single bee combination. The latter two Respectively 1.29 and 1.39 tablets. Under host competition, the number of eggs introduced into the bee pollens and A. gannhes was 1.21 and 1.43, respectively, which were significantly higher than those of the bees parasitized by only one bee The corresponding bee eggs, the latter were 1.06 and 1.19 tablets. The results suggest that both bees can recognize the existence of each other, and the yellow bee aphids showed greater competitiveness.