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What are the benefits of cooperative rearing of young silkworms? Silkworm farmers who know early benefit early
From hatching to cocoon spinning, silkworms generally go through 4 molts and 5 instars. Instars 1 to 3 are called young silkworms, and instars 4 to 5 are called large silkworms or mature silkworms. The young silkworm stage is the period for building up physical constitution and is the foundation of the entire silkworm rearing period. If young silkworms are raised well, the silkworms have a strong constitution, and in the large silkworm stage they can better resist adverse environments and pathogens. This is beneficial for a bumper cocoon harvest. Therefore, raising young silkworms well is the key to achieving a bumper cocoon harvest. (1) It facilitates scientific silkworm rearing: the young silkworm stage requires higher temperature and humidity, and a dedicated person must regulate and control temperature and humidity day and night.
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Detailed Explanation of Rearing Standards and Key Technical Points for Young Silkworms
The key to rearing young silkworms is to master reasonable temperature and humidity, appropriately mature fresh mulberry leaves and reasonable techniques for handling molting and awakening. For leaves used for collecting newly hatched silkworms, the leaf color is yellow with a hint of green, slightly wrinkled; in spring pick the 2nd leaf, in summer and autumn pick the 2nd-3rd leaf. For the 1st instar, use moderately mature leaves that are green with a hint of yellow, with a flat leaf surface, the 3rd-4th leaf, preferably tender rather than old, depending on the climate. For the 2nd instar, moderately mature leaves have a normal green color; for the 3rd instar in spring, three-eye leaves can be used. For the 1st-2nd instars, cut leaves into square pieces 1.5 times the body length of the silkworm, and use strip leaves when expanding the rearing bed. During the spring silkworm season, one can aim for 10 days to the third molt.
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Key Points of Mink Rearing Technology in Northern Regions
Mink belongs to the Mustelidae family and is a carnivorous animal. Its fur has many advantages, including abundant underfur, straight and warm fibers, a soft and glossy appearance, and a noble look when worn. It can be processed into high-grade fine-hair fur, and its products sell very well in developed Western countries. At present, China's fur market is in a period of high prices and tight supply, making this the industry with the highest returns and the best market prospects in the breeding sector. The following is an introduction to mink rearing technology in Northeast China. 1. Mink Breeds Currently, the world's most famous breeds are the American mink and the European mink.
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Detailed Explanation of Key Technical Points for Intensive Rearing of Broodstock During the Gonadal Transition Period
After the beginning of spring, as water temperature rises, broodstock gonadal development gradually transitions. Especially from early spring to mid-May before spawning, broodstock gonadal transition is extremely rapid, and the ovary coefficient can reach 15%-20%. During this period, doing a good job of intensive rearing management during the broodstock transition period can promote smooth spawning; otherwise, gonadal development will stagnate or even regress. The intensive rearing techniques for broodstock during the transition period are as follows. 1. Timely pond separation. To understand the growth and development status of broodstock and facilitate the arrangement of induced spawning and reproduction, broodstock should be separated into ponds when the water temperature is 10°C. Before pond separation, do a good job of disinfecting the small ponds
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Detailed Explanation of Artificial Rearing Methods and Breeding Techniques for the White-Banded Snake
The white-banded snake, also known as the many-banded krait or the golden-banded white-flowered snake, has high medicinal and economic value. Its rearing methods are as follows: 1. Build ponds properly. The snake pond is built with bricks and stones, 2 m square and 1.5 m high, and can hold 15-20 snakes; keeping too many snakes makes management difficult. The pond walls are smoothed with cement, and a movable glass cap is added on top of the wall in a T shape to prevent escape. The pond bottom is the snakes' activity area, where weeds should be planted, and snake dens should be built with sandy soil, wooden boards, bricks and tiles, etc. Build a flowing water ditch and a bait basin in the pond, and cover the pond with
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A Detailed Guide to Silkworm Rearing Techniques and Disease Prevention and Control Methods
1. What should be noted when rearing third-instar silkworms? The third-instar stage lasts about 96 hours, of which about 72 hours are spent feeding on mulberry leaves and about 24 hours in molting. Physiologically, third-instar silkworms are still in the young-silkworm stage; their growth rate is slower than that of the first and second instars, their body weight increases 5 to 6 times compared with the second instar, and their adaptability to high temperatures differs somewhat from that of the first and second instars. During rearing, attention should be paid to: (1) The rearing temperature during the third instar is best at 25.5°C to 26°C, with a wet-bulb depression of 2°C to 3°C. (2) The mulberry leaves used in the third instar should be mature leaves, not
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Rearing Methods and Technical Key Points for Ground Beetles (Eupolyphaga)
(1) Rearing equipment can be designed according to the scale and purpose of rearing. Here we only introduce the rearing equipment used to provide a source of medicinal insects. ① Insect sieves: their purpose is to separate nymphs of different instars, adults and oothecae by sieving within a certain period, and then rear them separately and isolate the medicinal insect bodies. The sieve apertures are divided into 5 specifications: 2-mesh sieve: used when separating out adults. 4-mesh sieve: used when separating out 7th-8th instar nymphs. 6-mesh sieve: used when separating out oothecae and insect feces. 12-mesh sieve: used when separating out 1st-2nd instar nymphs. 17-mesh sieve
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Detailed Guide to Autumn Turtle Hatchling Introduction Techniques and Rearing Methods
Because turtle hatchlings go through an adaptation process when moving from one environment to a new one, with a cycle of 1 month to 2 months before they gradually become normal, and since turtles are ectothermic animals, after autumn arrives, as the temperature gradually drops, turtles also gradually grow more slowly. The advantage of autumn introduction lies in seizing the opportunity when turtles are growing slowly at this time, letting them enter the new environment to adapt. After spring begins, as the temperature rises, the turtles immediately enter a growth state without needing to adapt to the new environment again. Under normal circumstances, turtle hatchlings introduced in autumn enter the growth period 1 month to 2 months earlier than those introduced in spring.
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Methods for Introducing Turtle Hatchlings in Autumn and Rearing Methods
Because turtle hatchlings go through an adaptation process when moving from one environment to a new one, with a cycle of 1 month to 2 months before they gradually become normal, and moreover turtles are ectothermic animals, after entering autumn, as the temperature gradually drops, turtles also gradually grow more slowly. The advantage of introducing stock in autumn lies in seizing the opportunity when turtles grow slowly at this time, letting them adapt to the new environment. After spring begins, the temperature rises, and the turtles immediately enter a growth state without needing to adapt to the new environment again. Under normal circumstances, turtle hatchlings introduced in autumn enter the growth period 1 month to 2 months earlier than
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Introduction to the Characteristics of the Tianshan Snow Chicken Breed and Its Rearing Methods
The Tianshan Snow Chicken belongs to the Phasianidae family and is a herbivorous poultry species. It originated at the summit of the Tianshan Mountains in China and is a rare breed unique to our country, with very small numbers. The Tianshan Snow Chicken is small in size with a robust constitution, a body length of about 60 cm, a delicate appearance, a purple beak, and an orange waxy base and covering over the nostrils; its whole body is covered with well-developed, upward-curving feathers. The Tianshan Snow Chicken moves nimbly, is alert in spirit, and is light and quick in activity. An adult male chicken weighs about 1.5 kg and begins to crow at 5 months of age; a female chicken weighs 1.2 kg, begins laying eggs at 6 months of age, and lays 120-150 eggs per year. Eggs weigh 40-50
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