木瓜实蝇属于我国进境检疫性害虫。为明确该虫对不同寄主果实的选择性,以评价其危害风险,本研究选择橙子、苹果、番石榴、杨桃、木瓜、西红柿、辣椒7种果实作为供试寄主,在室内选择性条件下比较了木瓜实蝇在不同寄主上的产卵量和幼虫发育的适合性。结果表明,以寄主气味诱导产卵器采卵时,雌虫在番石榴、橙子上产卵量明显高于其它所有供试寄主;以果实直接诱导产卵时,则以番石榴饲养出的幼虫数最多,而在橙子、西红柿上的幼虫数为0。在非选择性条件下将幼虫接入果实供试,表明木瓜实蝇幼虫在不同供试寄主上的存活率(化蛹率)均较高,最高为木瓜和杨桃,分别为92.0%和91.3%,最低为苹果,达到66.0%。不同供试果实对木瓜实蝇幼虫的发育历期、存活率(化蛹率)和蛹重有显著影响,但各适合性指标在不同寄主间的变化趋势不一致。上述结果表明,寄主气味及果皮特征对成虫的产卵选择性具有明显的影响,以产卵选择性和幼虫发育为综合指标,认为木瓜实蝇对番石榴的选择性最高。 Papaya fruit fly belongs to China’s quarantine pests. In order to clarify the selectivity of the insects to different host fruits and evaluate the risk of their damage, seven fruits of orange, apple, guava, carambola, papaya, tomato and pepper were selected as the test host in this study and compared under indoor selective conditions The papaya fruit fly in different hosts on the amount of eggs and larvae development fit. The results showed that when oviposition of ovipositor was induced by host odor, the fecundity of females on guava and orange was significantly higher than that of all other hosts tested. When the fruit directly induced oviposition, the larvae fed guava The largest number, while in oranges, tomatoes on the number of larvae 0. The larvae were introduced into the fruit under non-selective conditions for testing, indicating that the survival rate (pupation rate) of papaya fruit fly larvae on different hosts was high, up to papaya and carambola, which were 92.0% and 91.3% , The lowest for the apple, reaching 66.0%. Different test fruits had significant effects on the developmental duration, survival rate (pupation rate) and pupal weight of the fruit fly larvae of Papaya wood, but the variation tendency of different suitability indexes among different hosts was inconsistent. The above results showed that host odor and pericarp characteristics had significant effects on the oviposition preference of adults, and the oviposition preference and larval development were the comprehensive indexes. The highest selectivity of guava fruit fly to guava was found.