PHƯƠNG PHÁP BẢO QUẢN KÉN GIỐNG LƯỠNG HỆ TẰM DÂU

Mulberry bivoltine silkworm is very popular in Vietnam. The results showed that, after harvesting of cocoons from 1 day to 2 days they have to preserved seed cocoon on temperature 240C, so that pupation rate is higher and hibernaating eggs rate is lower than natural condition. Especially, no difference about economic index and biological index in next circlelife of silkworm between preservated in 240C and natural condition. In Ha Noi, preservation of seed cocoon pupation rate is higher and hibernating eggs rate is lower in summer season than spring season and autumn season.