抄録
We examined host stage preference of Allotropa subclavata, the most effective natural enemy of Planococcus kraunhiae, one of the serious fruit pests in Japan. Though adult females of A. subclavata drummed on all stages of the host, wasps could effectively insert the ovipositor against first and second instar nymphs. The next generation adults emerged from the hosts only when the wasps parasitized their first and second instar nymphs.
