著者

AKIMOTO,Shinichi

出版者

東京昆蟲學會

雑誌

昆蟲

巻号頁・発行日

vol.49, no.3, 1981-09-25

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Eriosoma yangi fundatrices usurp galls of other Eriosoma species. Such a habit has not been reported for any aphid so far. The fundatrix of a gall-forming species settles on a young elm shoot and induces a gall on a leaf a little away from its feeding site. On the other hand, the E. yangi fundatrix walks about actively on young leaves, and molts there usually until the 3rd instar. It does not form its own gall, but intrudes into a gall of other Eriosoma species. After the intrusion, E. yangi somehow kills the original gall proprietor. E. yangi is an obligatory parasite on the galls of other Eriosoma species.