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What to Do If Silkworms Do Not Spin Cocoons? Cause Analysis and Control Methods
I. Causes of silkworms not spinning cocoons: 1. Pathological factors. For example, pebrine and flacherie are prone to infection and disease before mounting, which destroys the silk gland secretion function of silkworms, or the pathogens produce large amounts of toxic metabolites in the silkworm body, paralyzing the silkworm's nerves and preventing them from spinning silk and forming cocoons; 2. Physiological factors. The first is abnormality of the middle silk gland, mainly caused by rearing temperature being too high or too low, leaf quality being too tender, secretory gland disorder, etc., causing silk gland abnormality and preventing spinning; the second is abnormality of the anterior silk gland, mainly because during rearing
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Technical measures to prevent the production of inferior cocoons in silkworm rearing
In silkworm rearing, selecting high-yield and high-quality cocoons is the key to a bountiful harvest. During the silkworm feeding process, many factors can produce large numbers of inferior cocoons and reduce @#@250@#@ benefits. In order to avoid producing inferior cocoons, increasing the rate of good cocoons and reducing the rate of inferior cocoons is an important step in further increasing the economic benefits of silkworm farmers. The relevant technical points for preventing inferior cocoons are briefly introduced as follows: 1 Strengthen feeding management 1.1 Rear young silkworms under plastic film mulching, which both keeps mulberry leaves fresh and encourages the larvae to feed readily, helping the larvae to eat their fill of good mulberry leaves and improve
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What to Do If Silkworms Don't Spin Cocoons? Causes and Solutions
In silkworm rearing, the phenomenon of silkworms not spinning cocoons occurs from time to time, causing certain losses to sericulture production. First, the causes of silkworms not spinning cocoons must be identified, and then measures taken for prevention and control. The main causes are: 1. Pathological factors. For example, flacherie and soft rot infect and develop before mounting, destroying the secretory function of the silkworm's silk glands; or pathogens produce large amounts of toxic metabolites in the silkworm body, paralyzing the nerves so that the silkworm cannot spin silk and form a cocoon. 2. Physiological factors. Abnormal middle silk glands, mainly due to excessively high rearing temperature,
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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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What are the patterns of silkworms spinning silk and forming cocoons? A full explanation of the process
The life of a silkworm goes through 4 stages: egg, larva, pupa and adult. The larval stage of the silkworm is what people call the silkworm baby stage. What is usually called sericulture refers to the rearing of the larvae. From hatching to cocoon spinning, the larva must go through 4 molts. People therefore divide the course of the larva into 5 instars. During the period before molting, the silkworm does not eat or move, which is called sleeping. From the first to the fourth instar, the silkworm must sleep 4 times; in the later stage of the fifth instar, it no longer sleeps, but spins silk and forms a cocoon, and pupates inside the cocoon, thereby completing the larval stage of the silkworm. Newly hatched silkworms are called ant silkworms, and newly molted
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Why don't silkworms spin cocoons? An analysis of common causes
1. Pathological factors. For example, flacherie and soft rot are prone to infecting and causing disease before mounting, destroying the silkworm's silk gland secretion function, or the pathogen produces large amounts of toxic metabolites in the silkworm's body, paralyzing the silkworm's nerves so that it cannot spin silk and form a cocoon; 2. Physiological factors. First, abnormalities of the middle silk gland, mainly caused by rearing temperatures that are too high or too low, leaves that are too tender, or imbalance of the secretory glands, which causes silk gland abnormalities and prevents spinning; second, abnormalities of the anterior silk gland, mainly caused by exposure during rearing to excessive coal gas, fishy odors, alcohol and other harmful gases
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How to Handle Silkworms After They Spin Cocoons? Key Management Points Silkworm Farmers Must Know
How to handle silkworms after they spin cocoons?
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What plant is Exochorda racemosa? Let's get to know this woody plant
Exochorda racemosa, also known as cocoon flower and golden melon fruit, is a deciduous shrub in the Rosaceae family. Its flowers are as white as snow, and its tree form is elegant. It is an ornamental flower suitable for planting in courtyards or as a potted plant. Come and take a look with the editor at what kind of flower this Exochorda racemosa is!
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How many of these distinctive foods from Xiangcheng in Linyi have you tried: stinky mandarin fish, maodan (balut), and silkworm cocoons?
1. Stinky mandarin fish: although the fish smells a bit stinky, the meat is very tender and the taste is great! 2. Shaobing (baked flatbread): a leavened flatbread baked over charcoal, and as soon as it arrives you smell a very rich aroma. The bread is soft and tasty, with slightly crisp edges. 3. Silkworm...
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