Influence of environmental condition in embrionic stage on diapause and hatchability of the multivoltine silkworm, <i>Bombyx mori</i>

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  • 催青条件が多化性蚕の休眠率と孵化率におよぼす影響
  • サイセイ ジョウケン ガ タカセイ カイコ ノ キュウミンリツ ト フカリツ ニ オヨボス エイキョウ

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We investigated the effects of day length on the diapause ratio in embryos and larvae of the tropical multivoltine silkworm, Bombyx mori. Our results show that the incubation of eggs at a high temperature (28°C) under a photoperiod of 24L : 0D effectively induced diapause-egg production. We also observed that the incubation affected the hatchability of eggs. Finally, we discovered that low hatchability and diapause ratios were improved by exposing eggs to more moderate temperatures (25°C) under a photoperiod of 16L : 8D for one day before hatching.<br>

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