Two Host Races in Andricus mukaigawae (Mukaigawa) (Hymenoptera: Cynipidae)

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Gall formation and oviposition of the unisexual adults of Andricus mukaigawae (Mukaigawa) were tested to substantiate variations in ability to infest three plant species of the genus Quercus. Under caged conditions, the unisexual wasps which had developed on Quercus mongolica Fischer and Q. serrata Thunb. Were able to produce a bisexual generation on these palants and also on Q. dentata Thunb. However, they did not oviposit in the buds of Q. dentata when the three host plant species were exposed at the same time. On the contrary, unisexual females which had developed on Q. dentata did not lay eggs in the buds of Q. mongolica and Q. serrata but did on Q. dentata in a forced oviposition experiment. Field observations indicate that the gall-forming ability of the bisexual generation of this wasp is similar to that of the unisexual gereration. On the basis of conspicuously qualitative difference in ovipositional preference of unisexual females, shape of the unisexual galls and gall-forming ability, two host races can be recognized in A. mukaigawae.

Original languageEnglish
Pages (from-to)381-387
Number of pages7
JournalApplied Entomology and Zoology
Issue number4
Publication statusPublished - 1988

All Science Journal Classification (ASJC) codes

  • Insect Science


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