ミカンナガタマムシの卵巣の発育と産卵前期間について

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  • Development of Ovary and Pre-oviposition Period of Citrus Flat-headed Borer, <i>Agrilus auriventris auriventris</i> S. SAUNDERS under Laboratory Conditions
  • ミカンナガタマムシ ノ ランソウ ノ ハツイク ト サンラン ゼン キカン ニ ツイテ

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Citrus flat-headed borer, Agrilus auriventris auriventris, is an important citrus pest in southern Japan. Sometimes this species increases in a restricted area and heavily infests citrus trees.<br>In this paper, the author wishes to show the development of ovary of these adult beetles rearing in glass vials under laboratory conditions. The beetles that emerged from Hassaku orange tree in August and September were used for dissection of ovaries.<br>The longevity of adult beetles that fed on citrus leaves was about 10 days average, and 5 days without any food. The eggs were not observed in ovarioles just after the time of the adult emergence. In feeding individuals, the ovum was formed in 5 or 6 days after emergence. But the full grown eggs were observed in 8 or 10 days and the oviposition began in 10 or more days after emergence. On the other hand, in individuals without food, any full grown ovum was not observed.<br>From these observations, it seemed that the eggs in the ovary of these beetles were formed slowly and many of the individuals could not live out to meet the time of oviposition.

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