Abstract
This paper deals with rearing of. silk-worm (Bombyx mori L.) by irradiation of fluorescent sunlamp emitting in the spectral region from 2700Å to 4000Å including Dorno region.
As the desirable results of the irradiation on the human body and the domestic animals were reported, we used this fluorescent sunlamp to study the effect to the silk-worm in spring and summer rearing seasons, in 1957.
The results obtaind as follows:
1). The experiments were made on four groups of silk-worm, namely, one, two, three, and four times irradiation each, with energy of 0.6 E-viton.h/cm2 per day except moulting period. The three times irradiation group showed the best result.
2) In the three times irradiation group, we observed shortning of rearing period, increase of the body weight, silk gland, digestion rate, silk length and silk weight, and decrease of death rate.
This experiment shows one of the methods to reduce the silk production cost. Now we are going to study the irradiaton about the egg, pupa and adult of silk-worm.
