A new male silkworm hybrid
(a) Variety traits. A new autumn male silkworm cultivar, Qiu Huaping 30, cultivated by the Sericulture Research Institute of Zhejiang Academy of Agricultural Sciences, has the advantages of strong physique, all ages, and a good breeding habit. The number of ant heads per gram is about 2310, and the fifth instar is 6 Days and 18 hours, full-length after 22 days and a half, hatching rate of 49.34% on the 2nd, silk length of 1240 meters, oval-shaped elliptical, large and even, white color, high rate of enamel layer and wire.
(II) Breeding techniques The ant exposure can be earlier than that of common species. The province’s strength should be expanded in a timely manner, and it should prevent eating sang bu wu. Large silkworms must have good mulberry satiation, fresh and ripe with mulberry. Small silkworm breeding temperature should be high, pay attention to fresh mulberry leaves, large silkworm period to strengthen ventilation. The temperature in the middle of the quail should be maintained at 25-25.5°C to enhance ventilation and ventilation in the squall and increase the rate of unwinding.
Second, male silkworm feeding management
(a) Mulberry leaf mining, transport, storage. The 4th instar silkworm mulberry picks the three leaves, the lower branches and the branchlets and leaves, and the fifth instar uses the mulberry to pick shoots or cut leaves on the shoot. In the summer silkworm stage, the silkworm mulberry picks off the budding buds and the new shoot base leaves. In the autumn silkworm stage, the silkworm mulberry picks the basal leaves. At the end of the autumn, 5-6 leaves were left at the top of the shoots.
The mulberry leaves are transported with the shipment, loosely packed and transported to prevent direct sunlight, and they are poured out immediately after being transported to the mulberry room for shaking and loosening to prevent heat deterioration of the mulberry leaves. The storage and storage room still requires low temperature, high humidity, and low air flow to maintain cleanliness. In and out of the storage room, it is necessary to change shoes and sterilize it with 1% available chlorine bleach liquid regularly. The storage room should be strengthened with management.
(b) to Sang. Male silkworm silkworm mulberry silkworm period, we must consider the full satiation of silkworm, but also consider saving mulberry to improve the unit with mulberry. With sprouts, leaves and leaves, mulberry 3-4 times a day; with mulberry feeding, mulberry 2-3 times a day. When male silkworm silkworm leaves or buds leaves, first shake the mulberry leaves loose, and then use both hands to evenly spread the mulberry leaves on the silkworm seat; when giving the mulberry leaves, place the tip and the base in parallel and place them from the silkworm seat. One end is given to the other in sequence.
(c) Expansion and uniform seats. In order to fully feed the male silkworm, the large silkworm stage should promptly expand the area of ​​the silkworm and pay attention to the uniform seat. In general, a male silkworm species (30,000 heads) has the largest silkworm area in the silkworm period: about 4 square meters and about 14 square meters, and about 5 years and 35 square meters. The symmetry seat is also carried out every time the mulberry is used, and the silkworms in the dense distribution area are moved to a thin place, so that the silkworm nest is dense and uniform, and the development of the silkworm population is promoted.
(d) Sand removal. Male silkworm silkworm has a large amount of mulberry mulberry, and the residual mulberry and defecate volume increase accordingly. In order to keep the silkworm pod clean and dry, sand must be removed. In addition to the 4th instar and the addition of 1 in addition to sleep, in addition to 2 times, a total of 4 times in addition to sand, 5 infancy after the removal of sand every day 1 times. The sand removal method and precautions are the same as those for ordinary silkworms.
(five) sleep processing. Male silkworm silkworm period plus sleep network should be appropriately delayed, with each head of a few heads of sleeping silkworms as the best time to sleep network. The temperature requirement during sleep is 0.5-1°C lower than the breeding temperature, and it is kept quiet and the light is even, and it stays dry during the early period of sleep (dry humidity difference 3-4°C). After seeing, it is appropriate to moisturize the skin. For the time of feeding, the color of the head of the silkworm, which is more than 90%, is pale brown. In the summer and autumn, due to the high temperature, foraging can be appropriately advanced.饷 Sang mulberry still needs to be fresh, give appropriate control of mulberry, according to 80% of the mulberry at most once as the standard.
(6) Feeding environment. Male silkworm silkworms, like common silkworms, are suitable for growth in relatively low temperature and relatively dry environments. Generally, 4th instar silkworms are fed with suitable temperature of 24-25°C, dry humidity difference is 2-3°C, and 5th instar silkworms are kept at appropriate temperature. For 23-24°C, the difference in dryness and humidity is 3-4°C. The 4th instar silkworm should avoid rearing at a temperature below 20°C, and the 5th instar silkworm should avoid breeding at a high temperature above 28°C for a long time.
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