This species was bred by the Institute of Sericulture of the Chinese Academy of Agricultural Sciences, and has been approved by the National and Zhejiang Crop Variety Approval Committees. It is a pair of high-quality, strong silkworm varieties suitable for feeding in the Yangtze River Valley during summer and autumn. , With a high calorie production, better silk quality, strong fluoride resistance and other characteristics. At present, it is popularized in Zhejiang, Yunnan, Anhui, and Jiangsu provinces. The annual breeding volume is about 1.2 million silkworm eggs, which accounts for about 7.0% of the total annual national feed.
(1) Main features. The ovum eggs of this species are darker, the eggs are dark gray, the eggs are white and yellow, the number of eggs is 1735, and the number of ant heads is about 2200: the eggs of the reverse cross are iron brown, the eggshell is milky white, and the eggs are counted. 1670 grains, about 2040 ant heads. Incubation is equal to one, ant silkworm dark brown. It was easy to raise from sleep, and it was easy to raise. During the summer period, a small number of 3 sleep silkworms were raised, and Sangwang was eaten. The silkworm body was larger. Bombyx mori is blue and white, and the silkworms and white silkworms are in the middle of each other. All cross-crosses are white silkworms. Strong constitution, strong resistance to bad environment such as high temperature and hot stuff, good fluoride resistance (the mulberry leaf fluorine content is still no effect in 50-60 mg/kg), but sensitive to pesticides. Older and more familiar, faster camping, cooked mulberry urine volume is more: hi camp in the lower jaw, the upper eyelid too easy to produce macular hernia.茧 Long oval or slightly waisted, 茧 shape evenly. The layers are tight and the creases are medium. The silk is about 1,100 meters long, and it is good and stable, with a cleanliness of 93 points or more. The larval stage is about 21 days old.
(2) feeding technology points. Fresh leaves should not eat wet leaves, steaming hot leaves, overnight leaves. High temperature weather should pay attention to cooling and ventilation work. The squat should be timely, properly cooked and sparsely cooked, to avoid excessive overcooking on the supper, and to strengthen ventilation and dehumidification. During the breeding period, it is necessary to prevent trace poisoning of silkworms, so as to avoid the occurrence of non-carrying tussah.
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