Host utilization by Nealsomyia rufella (Diptera ; Tachinidae)-Why does not the bagworm, Eumeta japonica (Lepidoptera ; Psychidae), become extinct in Kochi Prefecture?-

rufella Nealsomyia rufella（双翅目；飞蛾科）是一种寄主特异性的寄生蝇，寄生于日本袋虫（鳞翅目，飞蛾科）。风疹乳杆菌于1995年前后入侵日本，使日本粳稻种群进入灭绝状态，在日本各地都找不到粳稻种群。在高知县，粳稻种群数量也没有以前那么多，但至今仍保持小种群。在风疹乳螨入侵15年的过渡阶段，对高知县日本乳螨种群情况进行了调查，并对日本乳螨未灭绝的因素进行了探讨。

Nealsomyia rufella (Diptera; Tachinidae) is a host specific parasitic fly of the bagworm, Eumeta japonica (Lepidoptera, Psychidae). N. rufella invaded Japan in about 1995 and it drove E. japonica population into the extinction state so as not to find E. japonica population in various parts of Japan. In Kochi prefecture, E. japonica population was not seen as much as before either, but kept in small population up to the present day. At the stage that passed from an invasion of N. rufella for 15 years, the situation of E. japonica population Kochi prefecture was investigated and the factor that E. japonica did not become extinct was discussed.