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Introduction to the Guican No. 1 Silkworm Variety and Key Rearing Points

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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,

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 @#@250@#@. 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, the silkworms must be given plenty of high-quality mulberry leaves. The rearing bed should be kept sparse. During hot and humid weather, strengthen ventilation and air exchange. Do not feed tender leaves or wet leaves.

5. Mount the silkworms on cocooning frames at the suitable maturity stage. The density should be sparse to prevent overcrowding. Keep the light dim and strengthen ventilation to remove moisture, striving to keep the cocooning room dry.

6. Standard for acid treatment of silkworm eggs: For cold storage and acid treatment, use hydrochloric acid with a specific gravity of 1.094 at a liquid temperature of 47.8°C. For Chinese silkworm varieties, treat in acid for 5.0-5.5 minutes; for Japanese silkworm varieties, 6.0 minutes. Whole cocoon weight is approximately 1.7 grams, cocoon shell ratio reaches 22%, and neatness is 92 points (grade 3A). Cocoon yield per single sheet (10 grams of newly hatched silkworms) is over 36 kg.

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