Hymenopterous parasitoids of Fagineura crenativora Vikberg & Zinovjev verified in Tennoji Ridge, Mt. Tanzawa, Kanagawa Prefecture

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  • TANIWAKI Tooru
    Kanagawa Prefecture Environment Conservation Center
  • WATANABE Kyohei
    Laboratory of Insect Science, Graduate school of Agricultural Science, Kobe University

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  • 神奈川県丹沢山天王寺尾根で確認されたブナハバチの捕食寄生蜂相
  • カナガワケン タンザワサン テンノウジ オネ デ カクニン サレタ ブナハバチ ノ ホショク キセイバチソウ

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Abstract

Outbreaks of Fagineura crenativora Vikberg & Zinovjev have occurred in Tanzawa Mountains in Kanagawa Prefecture, causing beech trees to decline and die by cumulative feeding damages. To elucidate the fauna of its hymenopterous parasitoids, cocoons were collected at Tennoji Ridge from 2008 to 2010. As a result, ten species of Ichneumonidae and one species of Crysididae (Cleptes crassiceps Tsuneki: a new host record) were obtained. The reared ichneumonids belong to three subfamilies Cryptinae, Mesochorinae and Tryphoninae, and none of them have been known from Japan. Fifty two individuals of Cteniscus sp. A, twenty five of Aptesis sp. A, seventeen of Cteniscus sp. B and eleven of Endasys sp. emerged in three years, in combination accounting for 86.8% of the total number of parasitoids. An illustrated guide of adult morphological characters is provided for identification of the Ichneumonidae.

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