X線および紫外線照射が家蚕の多角体病誘発に及ぼす影響について

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  • Studies on the Induction of Nuclear and Cytoplasmic Polyhedroses by Treating with X-rays and Ultraviolet Light in the Silkworm, <i>Bombyx mori</i> L.
  • Xセン オヨビ シガイセン ショウシャ ガ カサン ノ タカクタイビョウ ユウハツ ニ オヨボス エイキョウ ニ ツイテ

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An attempt was made to gain some indications as to the role of X-ray and ultraviolet light in the induction of nuclear and cytoplasmic polyhedroses of the silkworm, Bombyx mori L.<br>No significant increase in spontaneous virus infection in the silkworm larvae resulted from exposure to ultraviolet radiation in the larvae exposed to the light alone and exposed to the light before or after cold treatment (5°C, 12-24hrs.). So it may be said that there was no indication that ultraviolet light induced the nuclear and cytoplasmic polyhedroses in the silkworm as reported in a few insects.<br>As shown in Table 1, there was no indication that exposure to X-rays enhanced the percentage of polyhedroses infected larvae, but in the case of the double treatments with X-rays and low temperature (5°C, 24hrs.), more virus-caused death resulted in the test larvae than in the control. The percentage of nuclear and cytoplasmic diseased larvae were markedly higher in those larvae treated with X-rays before and after cold treatments than in those treated with low temperature alone in the 5th instar larval stage soon after ecdysis.

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