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寄生发生前寄生蜂的寄生行为及寄生发生后寄生蜂的生长发育情况能够反映出寄主对寄生蜂的适合性,而寄生蜂对寄主营养物质的吸收和利用是寄生蜂完成发育的生理基础。为了从寄生蜂利用寄主营养能力的角度探讨寄主对不同种赤眼蜂适合性变化的原因,本文观察了以米蛾Corcyra cephalonica Stainton卵为寄主时拟澳洲赤眼蜂Trichogramma confusum Viggiani、松毛虫赤眼蜂T.dendrolimi Matsumura和玉米螟赤眼蜂T.ostriniae Pang et Chen的寄生行为及发育和存活情况,测定了被寄生米蛾卵内游离氨基酸的含量。结果发现,玉米螟赤眼蜂的产卵时间为84.9s,显著长于拟澳洲赤眼蜂和松毛虫赤眼蜂的产卵时间。拟澳洲赤眼蜂检测寄主所需时间为30.8s,显著长于玉米螟赤眼蜂和松毛虫赤眼蜂所需时间,但从每寄主卵中羽化出的拟澳洲赤眼蜂数量显著高于松毛虫赤眼蜂及玉米螟赤眼蜂寄生的结果。3种赤眼蜂卵+幼虫的发育历期间不存在显著差异,但卵-成虫的发育历期间存在显著差异。玉米螟赤眼蜂幼虫期和预蛹期的死亡率均显著高于拟澳洲赤眼蜂和松毛虫赤眼蜂相应虫期的死亡率。这些结果表明:米蛾卵对松毛虫赤眼蜂及拟澳洲赤眼蜂的适合性高于对玉米螟赤眼蜂的适合性。未被寄生的米蛾卵内游离氨基酸的总量在24~96h时间段内从开始的2.194mg/mL逐渐下降到1.565mg/mL,而被寄生的米蛾卵内游离氨基酸总量均出现先升高后下降的现象。被松毛虫赤眼蜂和拟澳洲赤眼蜂寄生的米蛾卵内游离氨基酸总量在48h达到最高值,分别为4.239mg/mL和3.222mg/mL,被玉米螟赤眼蜂寄生的米蛾在72h达到最高值,为4.323mg/mL,显示同玉米螟赤眼蜂相比,松毛虫赤眼蜂和拟澳洲赤眼蜂能够更快地分解利用寄主营养。这些结果提示,3种赤眼蜂利用米蛾卵内营养物质能力的不同导致了米蛾卵对3种蜂适合性的不同。
Parasitic parasitic wasps before parasitic parasitic behavior and parasite growth after parasitization can reflect the host adaptability of parasitoids, parasitoids and the host nutrient absorption and utilization of the parasitic bees to complete the physiological basis for the development. In order to explore the host’s adaptability to different species of Trichogramma from the point of view of the ability of host parasitism to utilize hosts, this paper observed the Trichogramma confusum Viggiani Trichogramma The parasitism behavior, development and survival of T. dendrolimi Matsumura and T. ostriniae Pang et Chen were measured, and the content of free amino acids in eggs of M. parasitoid was determined. The results showed that the oviposition time of Trichogramma ostriniae was 84.9s, significantly longer than that of Trichogramma ostriniae and Trichogramma ostriniae. The time required to detect the host Trichogramma from Trichosanthes australis was 30.8 s, which was significantly longer than that of Trichogramma ostriniae and Trichogramma ostriniae, but the number of Trichosanthes emigata Trichogramma Trichogramma and Trichogramma ostriniae parasites results. There was no significant difference between the developmental stages of the three species of Trichogramma eggs and larvae, but significant differences existed between the developmental stages of eggs and adults. Mortality of Trichogramma ostriniae larvae and pre-pupal stage were significantly higher than those of Trichogramma ostriniae and Trichogramma ostriniae. These results indicate that the fit of rice moth eggs to Tricholoma matsutake and Trichogramma ostriniae is higher than that to T. ostriniae. The total amount of free amino acids in unpaired rice moth eggs decreased gradually from 2.194mg / mL to 1.565mg / mL in the 24-96h period, while the total amount of free amino acids in parasitized rice moth eggs appeared first After the increase of the phenomenon of decline. The total amount of free amino acids in eggs of M. moth parasitized by Trichogramma dendrolimi and Trichogramma ostriniae reached the highest value at 48h, which were 4.239mg / mL and 3.222mg / mL, respectively. Reaching the highest value at 72 h, at 4.323 mg / mL, showing that the Trichogramma Trichogramma and Trichogramma quadratus decompose and utilize host nutrition more rapidly than Trichogramma ostriniae. These results suggest that the ability of three species of Trichogramma to utilize the nutrients in rice eggs results in the different fit of the rice moth to the three bees.