Egg-laying and Mining Habits in the First Generation of Beet Leaf-Miner, <I>Pegomya cunicularia</I> (Rondani) on Sugar Beet

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  • IWASAKI Akeo
    Hokkaido Prefectural Kitami Agricultural Experiment Station

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  • テンサイモグリハナバエ第1世代のテンサイに対する加害様相
  • テンサイモグリハナバエ ダイ1 セダイ ノ テンサイ ニ タイスル カガイ ヨウソウ

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Egg-laying and mining habits in the first generation of beet leaf-miner, Pegomya cunicularia (Rondani), were examined on sugar beet, Beta vulgaris, in Hokkaido, Japan. Egg masses were composed of 1-11 eggs, with 4.0 as average, and mostly laid on lower 6 leaves, scarcely on upper 7th-10th. Leaf mines were also abundant on lower to middle leaves, and more than 90% mines were concentrated on the lower 7 leaves out of 12 at the end of infestation period of the generation.

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