Morphological Variation and Life Cycle of Spiraea salicifolia-infesting Aphid, Aphis neospiraeae Takahashi (Homoptera: Aphididae)

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  • SUGIMOTO Shun'ichiro
    Yokohama Plant Protection Station:(Present office)Plant Protection Division, Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries
  • SEINO Yoshinori
    Muroran-Tomakomai Branch of Yokohama Plant Protection Station:(Present office)Yokohama Plant Protection Station

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  • ホザキシモツケを寄主とするアブラムシAphis neospiraeae Takahashiの個体変異と生活環
  • ホザキシモツケ オ キシュ ト スル アブラムシ Aphis neospiraeae Takahashi ノ コタイ ヘンイ ト セイカツカン

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Morphological variation and life cycle of Aphis neospiraeae Takahashi were investigated at Tomakomai, Hokkaido, northern Japan. Large-sized apterous and alate viviparous females (1.7mm or more in length) showed well developed dorsal bands or a large dorsal patch on the abdomen and siphunculi longer than cauda. Small-sized apterous and alate viviparous females (less than 1.5mm in length), however, showed small dorsal median sclerites or no sclerites on the abdomen and siphunculi equal to or shorter than cauda. The life cycle was found to be monoecious and holocyclic on Spiraea salicifolia. The fundatrix appeared from the end of May, and oviparous female and male from the end of September and the beginning of October, respectively. In this paper these three morphs are described for the first time.

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