인위적 유발에 의한 가잠 중장형다각체병의 연구

Studies on the mid-gut polyhedroses induced by artificial treatments in the silkworm, Bombyx mori L.

본 시험은 중장형다각체병이 과연 우리나라에서도 전염하는가를 알기 위하여 실시한 것이다. 그 결과 우리나라에서도 이것이 전염함을 알았기에 이를 보고한다. 1. 여러 가지 인위적 유발처리에 의하여 중장형다각체병이 유발되며 기중에서도 5령 기잠을 향식 적기에 저온처리한 것이 (5$^{\circ}C$, 24시간) 가장 효과적이었다. 2. 추잠기 보통사육잠에서도 해잠병이 발생하였으니 사육중의 모든 악조건의 총화가유인이 되어서 발병한 것이라고 하겠다.

It is well known that the mid gut polyhedroses can be a cause of serious disease of silkworm in Japan. In our country, however, this disease has not been discussed up to the present. Author made the experiments to know whether this disease aws infectious or not in our country. The results are as follows: 1. The mid-gut polyhedroses was induced by some artificial treatments, of which the most effective one was low temperature treatment (at 5$^{\circ}C$ for 24 hours) at the 5th instar before first feeding. 2. Author found a few infected silkworms which were reared by a farmer in fall in 1964. It was supposed that the induction of this disease was due to the cumulative effects of the bad conditions on the silkworms. Especially the great cause of this disease depended on the quality of the mulberry leaves.