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Proper removal of silkworm excrement can effectively reduce the occurrence of silkworm diseases
Silkworm excrement not only harbors the pathogens of viral flacherie, but is also a breeding and transmission site for the pathogens of many silkworm diseases such as empty-head soft rot, bacterial soft rot, and muscardine. Data show that when pathogen-carrying silkworm excrement from spring-reared silkworms is left for 15 days and then comes into contact with mulberry leaves, it can cause the incidence of midgut-type viral flacherie in silkworms that eat those leaves to reach 75%; when pathogen-carrying silkworm excrement from late-autumn-reared silkworms is left for 1 day and then comes into contact with mulberry leaves, it can cause the incidence of midgut-type viral flacherie in silkworms that eat those leaves to reach 60%, and after 7 days the incidence reaches 100%. Therefore, during routine rearing,
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Detailed Explanation of Key Technical Points and Management Methods for Silkworm Rearing
I. Incubation Supplementation and Silkworm Collection Currently, all silkworm eggs used for producing raw silk cocoons are binary hybrids or multi-line hybrids, and the technical handling is roughly the same. Proper protection of silkworm eggs and the use of appropriate collection methods have a great effect on the growth and development of silkworms. 1. Receiving eggs: It is best to do this in the early morning or evening when the temperature is lower. During this period, avoid direct sunlight or rain, pay attention to ventilation, and never stack or press them. 2. Incubation supplementation of silkworm eggs: After receiving the silkworm eggs from the silkworm egg farm or station, they should continue to be protected in a suitable environment
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New silkworm varieties successfully bred in Hubei
The new silkworm varieties "Ecan 3" and "Ecan 4", bred by the Cash Crop Research Institute of the Hubei Academy of Agricultural Sciences (postcode: 430070, tel: 027-87389436), recently won first prize in the Hubei Provincial Science and Technology Progress Awards. The robust autumn-use variety Ecan 3, compared with Hubei's current leading autumn-use variety Huanghe x Zhaoxia: strong resistance, with a unified larval-pupal survival rate of over 92%; high yield, with cocoon production of 33.95 kg per sheet, an increase of 9.94%; excellent silk quality, with a cocoon shell rate of 24.83%, a single cocoon silk length of 1150 m
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Key Technical Points for Silkworm Rearing, Cocoon Harvesting and Cocoon Selling
I) Cocoon harvesting 1. Proper time for cocoon harvesting: After the mature silkworm finishes spinning its cocoon, it molts and pupates. As the pupa develops, the body skin hardens and darkens in color. When the skin color turns yellow, it is the proper time for cocoon harvesting. In the spring silkworm season, it is 6-7 days after mounting on the cocooning frame. In the summer-autumn silkworm season, it is 5-6 days after mounting, and in the late-autumn silkworm season, it is 7-8 days after mounting; generally the cocoons can then be harvested. If cocoons are harvested too early, the silkworm has not yet pupated, and "hairy-foot" cocoons are difficult to dry evenly and suitably during cocoon drying, lowering cocoon quality; moreover, when such cocoons are boiled, the impurities in the silkworm body readily seep out into the cocoon layer, worsening the color of the raw silk.
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Warm weather gradually arrives in the third month of spring; prepare mulberry and silkworms without delay
The sluggish cocoon price market in 2007 affected silkworm farmers' enthusiasm for planting mulberry and raising silkworms to a certain extent. For farmers in the key sericulture townships of Chun'an County, planting mulberry and raising silkworms is still the main source of household income. Therefore, the author reminds the broad community of silkworm farmers to treat the sluggish cocoon market rationally and not to easily waver in their enthusiasm for raising silkworms. At present, it is necessary to seize the favorable opportunity to order enough good spring silkworm eggs, do a good job in mulberry field fertilization and management, and strive to make a comeback in the Year of the Rat. Relevant provincial experts believe that the sharp
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Introduction to the Guican No. 1 Silkworm Variety and Key Rearing Points
1. Silkworm eggs are incubated using the high-temperature photoperiod method. In the early incubation period (days 1-4), maintain 26°C with a wet-dry difference of 1.5; in the late period (days 5-10), maintain 28°C with a wet-dry difference of 1.5-1. Provide 16 hours of light per day. After the appearance of blue dots, keep in darkness to promote uniform hatching. 2. Carefully carry out disease prevention and disinfection before, during, and after rearing. During the rearing period, strengthen disease prevention, hygiene, and technical management to eliminate sources of disease and reduce the occurrence of diseased silkworms. 3. For newly hatched silkworms and their first feeding, carefully select fresh, suitably mature mulberry leaves for feeding. 4. During the late larval stage, especially during the peak feeding period of the fifth instar,
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How to mix nutritional formulas for silkworms in summer and autumn
The main feed for silkworms is mulberry leaves. Since the quality of mulberry leaves varies greatly between seasons, it has a considerable impact on cocoon yield and quality. If nutritional supplements are fed to silkworms raised in summer and autumn, the yield can increase by 10%-20%. The formula techniques are introduced as follows: 1. Supplement formulas and feeding methods. 1. Glucose solution additive. During the silkworm rearing period, if there is continuous rainy weather, the mulberry leaves are tender in texture due to insufficient sunlight, have a high moisture content, and lower carbohydrates. At this time, a 5% glucose solution can be sprayed on the harvested mulberry leaves. After
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Detailed Explanation of Key Technical Points for Rearing Large Silkworms in Autumn
The main reason for the instability of autumn silkworm production is the damage caused by silkworm diseases. As the number of silkworm rearings increases, the number of pathogens increases, the spread area expands, and the viruses are fresh and multiply quickly, resulting in a high disease rate. After repeated use of silkworm rooms and silkworm tools, if disinfection is not thorough and rearing management is relaxed, combined with the harsh environment of high temperature and high humidity or high temperature and dryness in autumn, as well as the poor quality of mulberry leaves, the silkworms have weak disease resistance, all of which are the main reasons for the easy outbreak of silkworm diseases during the large silkworm stage in autumn. 1. Strengthen disinfection and disease prevention, eliminate pathogens. The effective measure to prevent silkworm diseases is disinfection, eliminating
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What to Do When Silkworms Are Poisoned? Detailed Explanation of Six Rescue Methods
1. Bleaching powder detoxifying solution. For mulberry leaves contaminated by bacterial pesticides, use 0.15-0.25 kg of bleaching powder, add 50 kg of clean water to make a bleaching powder solution. Take the clarified liquid and spray it on the surface and underside of mulberry leaves, and feed the silkworms only after the leaves have no medicinal odor. 2. Atropine aqueous solution. When mulberry leaves contaminated by organophosphorus pesticides and arsenic-containing pesticides cause silkworm poisoning, use 0.3 g atropine tablets or 0.5 g atropine liquid in 1 vial, add 0.5 kg of cooled boiled water, rinse the poisoned silkworms or spray it on mulberry leaves as an additional feed, until the silkworms
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Occurrence and Damage Characteristics of the Bridgeworm Pest on Lingzhi
The bridgeworm (Noctuidea) belongs to the family Geometridae. The lingzhi bridgeworm of this family (name to be determined) is an important pest damaging lingzhi. 1. Morphology and habits: The adult is 12 mm long with a wingspan of 25-28 mm, a small grayish-black moth. The antennae are filiform; the forewings are triangular with 8 black spots along the outer margin and one larger black spot in the middle of the costal margin; the hindwings are grayish-white. The egg is flat and round, 0.6-0.7 mm long and 0.4-0.5 mm wide, milky white initially and grayish-green before hatching. The mature larva is 22-25 mm long,
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