Elucidation of ecological properties of Bactrocera fruit flies, serious pests of fruits, in their native areas for the establishment of new pest control measures

共鉴定出5种果实蝇属（包括B的两个姊妹种）。dorsalis complex）作为主要害虫实蝇在西爪哇，印度尼西亚，使用男性引诱陷阱和受侵染的水果取样。特别是要识别B。carambolae（B. c）和B.番木瓜（B.p）的近缘种，由于其亲缘关系较近，很难区分，为此，建立了一种简单实用的形态学鉴别方法。采果调查表明，两种虫的寄主具有一定的专化性，B. c主要寄生在星星果上，而B.p主要寄生在芒果上。然而，实验室实验没有发现宿主的专门化。这些结果表明，在现场观察到的一些主机专业化反映了物种的生态特性，如交配行为的差异。

We identified five Bactrocera species (including two sibling species of B. dorsalis complex) as major pest fruit flies in west Java, Indonesia, using male-attractant traps and sampling of infested fruits. In particular, to identify B. carambolae (B.c) and B. papayae (B.p), sibling species being hardly identifiable due to their close resemblances, we developed a simple and practical identification method on the basis of their morphology. The sampling survey of infested fruits revealed some degree of host specialization of the two species; B.c mainly on star fruit whereas B.p mainly on mango. Laboratory experiments, however, detected no host specialization. These results suggested that some host specialization observed in the field reflected species-specific differences in ecological properties, such as mating behaviors.