[Method of controlling of mulberry silkworm hatch]
1990
Rim Ung Se (Agriculture Publishing House, Pyongyang (Korea Democratic People's Republic))
This research has an objective to increase silk production by method of controlling silkworm hatching with light control silkworm hatches in several hours and days, if it is controlled by light it can hatch all together in a few hours and one day, which will overcome the discrimination of silk growth. In case of small scale experiment, the egg sheet was covered with double dark papers and in case of large scale, after putting eggs in a certain sized box covered with dark blanket, to be stored in condition of light; O Lux and standard condition of temperature and humidity. From the morning of three days before hatching, full darkness was made day and night for 4 days and then at 6 in the morning of 5th day, light was made in. The hatched silkworm weight was heavier than the compared silkworm, normal in respiration and digestion and good appetite and high yielding as to 110%
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