Lu Jing × Huayang
Lu Jing × Huayang is a new spring-season, high-silk-yield male silkworm variety adapted to the climatic conditions of Shandong Province.
Keywords:
Silkworm eggs
Category:
Phone:
Lu Jing × Huayang
Lu Jing × Huayang is a new spring-season, high-silk-yield male silkworm variety adapted to the climatic conditions of Shandong Province.
Keywords:
Category:
Consultation Hotline:
Detailed Information
Varietal Traits
Lu Jing × Huayang is a Chinese–Japanese hybrid spring–rearing variety specially bred for high silk yield, characterized by two generations per year and four instars. The hybrid combination is unidirectional; no reciprocal crosses are possible. Female eggs are lethal during the pre-hatching stage, resulting only in the hatching of male silkworms, with no significant delayed mortality. The hatchability is approximately 50%. Overwintered eggs are grayish-green, with a yellowish shell interspersed with white. Newly hatched larvae are dark brown, highly prone to dispersal; mature larvae exhibit a bluish-white body color with widespread blotches. Development and dormancy initiation are uniform across all instars, with rapid growth and vigorous mulberry consumption during the peak feeding period—no leaf-trampling—and strong stress resistance. The cocoons are pure white, moderately fine with slight shrinkage and wrinkling, easy to unwind, clean and of excellent quality, with relatively fine filament fineness and superior silk quality. The entire life cycle lasts about 25 days, yielding a total cocoon weight of 1.50 grams, a cocoon-to-cocoon ratio of 25%, a cocoon filament length of approximately 1,240 meters, a filament fineness of 2.4–2.7 denier, and a cleanliness rating of 95 or higher, making it suitable for reeling high-grade raw silk of 6A grade or above.
Key Points of Rearing Techniques
1. Strict disinfection to prevent disease: Thoroughly wash and disinfect the rearing rooms and equipment before starting silkworm rearing; establish a dedicated mulberry-storage room; at each instar, alternate every other day between using Disease-Prevention No. 1 and fresh lime powder for isolating and disinfecting the silkworms and their rearing surfaces; during the dormant period, fumigate the rearing rooms with fumigants.
2. Hatching induction standards: For embryos of grades B3 to D2, maintain a temperature of 23–24°C; for embryos of grades D3 to F5, maintain a temperature of 25.5–26.5°C during hatching induction, with a diurnal temperature range of 1.5–2°C; the hatching induction period is approximately 12 days.
3. Temperature and humidity standards: For the 1st–2nd instar, maintain a temperature of 28°C with a dry–wet temperature difference of 1–1.5°C; for the 3rd instar, maintain a temperature of 26–27°C with a dry–wet temperature difference of 1.5–2°C; for the 4th–5th instars, maintain a temperature of 25°C with a dry–wet temperature difference of 3°C. During hot, humid seasons, the dry–wet temperature difference should be set 1–2°C wider.
4. Conduct advance seat expansion for all rearing stages to prevent excessive crowding at the silkworm head; during the mature larval stage, enhance ventilation and dehumidification, and promptly expand the rearing space to avoid overcrowding. Ensure that high-quality mulberry leaves are provided in sufficient quantity and that young larvae and those being collected for pupation are harvested at an appropriately tender stage, while mature larvae are fed fully mature mulberry leaves. During wet seasons, intensify dehumidification measures.
5. Medicated Feeding: Administer an antibiotic treatment once each during the 3rd to 5th instar, the peak feeding period, and the pre-pupal stage.
Precautions
1. The area of male silkworm eggs is twice that of ordinary strains; implement timely dark treatment and strictly prevent egg bags from being stacked or subjected to steam heat that could lead to overheating and spoilage.
2. Properly store mulberry leaves; do not cover them with plastic film to prevent dew-covered, sticky, or deteriorated leaves from being fed to silkworms.
3. Avoid exposure to pesticides and tobacco, and take precautions against damage caused by rodents, ants, and other pests.
4. Maintain a cluster temperature of around 25°C. In the three days prior to moving the clusters into the rearing room, take precautions against high temperatures and sudden temperature fluctuations; initiate cluster placement slightly earlier than usual when the brood is at the appropriate stage of development. Prepare 20–30 more square-frame clusters than for standard rearing to avoid overcrowding. Pay particular attention to cluster management: ensure even lighting and protect against direct strong winds. Clean the cluster room promptly, open doors and windows to enhance ventilation and dehumidification, and thereby improve the emergence rate.
5. Drying and roasting characteristics: During fresh cocoon procurement, strict classification is essential, based on cocoon shape and the age of the pupa, with separate sorting accordingly. Male silkworm cocoons are relatively uniform in size and have small, evenly distributed pupae, making them easy to dry to the desired moisture level with consistent drying throughout. The cocoon layer of male silkworms is thick and compact, with relatively fine silk filaments and poor permeability; therefore, during the drying process, careful control of temperature transitions between high and low settings as well as humidity levels is crucial. Typically, the initial drying stage should be maintained at 32–35°C for 3.5–4 hours, followed by a second drying stage at 30–32°C until the cocoon reaches the appropriate dryness for removal from the kiln. Whether fully dried or semi-dried, adequate ventilation must be ensured to improve silk unraveling.
Lu Jing × Huayang is a Chinese–Japanese hybrid spring–rearing variety specially bred for high silk yield, characterized by two generations per year and four instars. The hybrid combination is unidirectional; no reciprocal crosses are possible. Female eggs are lethal during the pre-hatching stage, resulting only in the hatching of male silkworms, with no significant delayed mortality. The hatchability is approximately 50%. Overwintered eggs are grayish-green, with a yellowish shell interspersed with white. Newly hatched larvae are dark brown, highly prone to dispersal; mature larvae exhibit a bluish-white body color with widespread blotches. Development and dormancy initiation are uniform across all instars, with rapid growth and vigorous mulberry consumption during the peak feeding period—no leaf-trampling—and strong stress resistance. The cocoons are pure white, moderately fine with slight shrinkage and wrinkling, easy to unwind, clean and of excellent quality, with relatively fine filament fineness and superior silk quality. The entire life cycle lasts about 25 days, yielding a total cocoon weight of 1.50 grams, a cocoon-to-cocoon ratio of 25%, a cocoon filament length of approximately 1,240 meters, a filament fineness of 2.4–2.7 denier, and a cleanliness rating of 95 or higher, making it suitable for reeling high-grade raw silk of 6A grade or above.
Key Points of Rearing Techniques
1. Strict disinfection to prevent disease: Thoroughly wash and disinfect the rearing rooms and equipment before starting silkworm rearing; establish a dedicated mulberry-storage room; at each instar, alternate every other day between using Disease-Prevention No. 1 and fresh lime powder for isolating and disinfecting the silkworms and their rearing surfaces; during the dormant period, fumigate the rearing rooms with fumigants.
2. Hatching induction standards: For embryos of grades B3 to D2, maintain a temperature of 23–24°C; for embryos of grades D3 to F5, maintain a temperature of 25.5–26.5°C during hatching induction, with a diurnal temperature range of 1.5–2°C; the hatching induction period is approximately 12 days.
3. Temperature and humidity standards: For the 1st–2nd instar, maintain a temperature of 28°C with a dry–wet temperature difference of 1–1.5°C; for the 3rd instar, maintain a temperature of 26–27°C with a dry–wet temperature difference of 1.5–2°C; for the 4th–5th instars, maintain a temperature of 25°C with a dry–wet temperature difference of 3°C. During hot, humid seasons, the dry–wet temperature difference should be set 1–2°C wider.
4. Conduct advance seat expansion for all rearing stages to prevent excessive crowding at the silkworm head; during the mature larval stage, enhance ventilation and dehumidification, and promptly expand the rearing space to avoid overcrowding. Ensure that high-quality mulberry leaves are provided in sufficient quantity and that young larvae and those being collected for pupation are harvested at an appropriately tender stage, while mature larvae are fed fully mature mulberry leaves. During wet seasons, intensify dehumidification measures.
5. Medicated Feeding: Administer an antibiotic treatment once each during the 3rd to 5th instar, the peak feeding period, and the pre-pupal stage.
Precautions
1. The area of male silkworm eggs is twice that of ordinary strains; implement timely dark treatment and strictly prevent egg bags from being stacked or subjected to steam heat that could lead to overheating and spoilage.
2. Properly store mulberry leaves; do not cover them with plastic film to prevent dew-covered, sticky, or deteriorated leaves from being fed to silkworms.
3. Avoid exposure to pesticides and tobacco, and take precautions against damage caused by rodents, ants, and other pests.
4. Maintain a cluster temperature of around 25°C. In the three days prior to moving the clusters into the rearing room, take precautions against high temperatures and sudden temperature fluctuations; initiate cluster placement slightly earlier than usual when the brood is at the appropriate stage of development. Prepare 20–30 more square-frame clusters than for standard rearing to avoid overcrowding. Pay particular attention to cluster management: ensure even lighting and protect against direct strong winds. Clean the cluster room promptly, open doors and windows to enhance ventilation and dehumidification, and thereby improve the emergence rate.
5. Drying and roasting characteristics: During fresh cocoon procurement, strict classification is essential, based on cocoon shape and the age of the pupa, with separate sorting accordingly. Male silkworm cocoons are relatively uniform in size and have small, evenly distributed pupae, making them easy to dry to the desired moisture level with consistent drying throughout. The cocoon layer of male silkworms is thick and compact, with relatively fine silk filaments and poor permeability; therefore, during the drying process, careful control of temperature transitions between high and low settings as well as humidity levels is crucial. Typically, the initial drying stage should be maintained at 32–35°C for 3.5–4 hours, followed by a second drying stage at 30–32°C until the cocoon reaches the appropriate dryness for removal from the kiln. Whether fully dried or semi-dried, adequate ventilation must be ensured to improve silk unraveling.
Related
Information
We will contact you to provide information about you and about us!
Shandong Guangtong Silkworm eggs Co., Ltd.
Copyright © 2026 Shandong Guangtong silkworm eggs Co., Ltd.