Association of the Root Aphid Parasitoids Aclitus sappaphis and Paralipsis eikoae (Hymenoptera, Aphidiidae) with the Aphid-attending Ants Pheidole fervida and Lasius niger (Hymenoptera, Formicidae)

概要

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The association of two aphidiid parasitoids of a root aphid (Sappaphis piri MATSUMURA) on wormwood, Aclitus sappaphis TAKADA & SHIGA and Paralipsis eikoae (YASUMATSU), with two aphid-attending ants, Pheidole fervida FR. SMITH and Lasius niger (LINNE), was examined experimentally. The oviposition behavior of A. sappaphis was also observed. A single female parasitoid of each species was released on an aphid colony attended by workers (and soldiers) of either of the two ants, and her behavior and reactions when encountering ants and aphids were observed. A. sappaphis females were accepted by almost all P. fervida ants they encountered through mutual antennal tapping, but were attacked by L. niger ants. P. eikoae females were accepted friendly by L. niger ants if the females tested were the same in origin as the ants exposured, but were attacked if different in origin. In the interplay with L. niger ants, P. eikoae females exhibited not only antennal tapping and mouth to mouth contact but also rubbing her leg on the ant. If the female succeeded in riding on an ant of an alien colony and began rubbing, she became accepted by the colony soon after. P. eikoae females were vigorously attacked by P. fervida ants. The oviposition behavior of A. sappaphis was characteristic in mounting on the host aphid and in inserting the ovipositor perpendicularly.
日本昆虫学会の論文
1985-03-25