Rearing method of the rice water weevil, <I>Lissorhoptrus oryzophilus</I> Kuschel (Coleoptera: Curculionidae) in the laboratory

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  • UKISHIRO Noboru
    Sumitomo Chemical Co., Ltd., Takarazuka Research Center Takatsukasa
  • HARADA Masako
    Sumitomo Chemical Co., Ltd., Takarazuka Research Center Takatsukasa
  • HIRANO Masachika
    Sumitomo Chemical Co., Ltd., Takarazuka Research Center Takatsukasa

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  • イネミズゾウムシの飼育
  • イネミズゾウムシ ノ シイク

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Abstract

The rearing method of the rice water weevil, Lissorhoptrus oryzophilus Kuschel, was studied in a laboratory and a greenhouse by using a rice plant and a barnyard millet. The adults collected in the paddy field in Mie pref. in May, 1988 were reared on a rice plant. The larvae of the next generation obtained from these adults were reared in the biotron (25±1°C, 16L8D), Greenhouse A (25-32°C, 16L8D), and Greenhouse B (20~32°C, 16L8D). It was cleared that the adults emerged from a rice plant and a barnyard millet after around 40 days, however, no adult was obtained when tap water was supplied in any cases. This seems that the chlorine ion in tap water interferes the larval development. The newly obtained adults oviposited at 28±1°C, 50-95% R.H., 16L8D, 120001x, nevertheless, no adults oviposited at 25±1°C.

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