-
What to Do If Silkworms Don't Spin Cocoons? Causes and Solutions
I. Main Causes 1. Pathological factors. For example, with pébrine or flacherie, infection and onset before mounting for spinning destroys the secretory function of the silkworm's silk glands; or the pathogen produces large amounts of toxic metabolites in the silkworm's body, paralyzing the silkworm's nerves so it cannot spin silk or form a cocoon. 2. Physiological factors. Abnormal middle silk glands, mainly caused by excessively high rearing temperatures, overly tender leaves, disordered secretory glands, etc., leading to abnormal silk glands and inability to spin. Next is abnormal anterior silk glands, mainly caused by exposure to large amounts of coal gas, fishy odors,
-
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
-
Feed Formulation and Processing Techniques for Medicinal Silkworm Larvae Infected with Beauveria bassiana
Currently, medicinal silkworm larvae infected with Beauveria bassiana are in strong demand on the Chinese medicinal herb market, and raising and processing them is profitable. The methods for raising and processing them are: 1. Rearing the mature silkworms. Raising and processing medicinal silkworm larvae infected with Beauveria bassiana should be carried out as a specialized operation in non-cocoon-producing areas, so as to avoid a devastating impact on cocoon silkworms. The raising and processing can be carried out throughout the year. As for the feed, besides a small amount of mulberry leaves, more evening primrose, Jiancan grass, white clover, cup plant (Silphium perfoliatum) and the like can be added to replace mulberry leaves, so as to supplement the shortage of mulberry leaves and reduce feeding costs. For
-
What insecticide works well to control cutworms?
Cutworms, also known as greasy cutworms, belong to the order Lepidoptera, family Noctuidae. They have extremely varied feeding habits and mainly damage spring-sown (transplanted) vegetable seedlings, causing serious damage to solanaceous fruits, cucurbits, legumes and cruciferous vegetables after planting out. Control methods 1. Agricultural control: In early spring, clear weeds from the vegetable plot and its surroundings; spring plowing and harrowing, autumn plowing to sun the soil and winter irrigation can all kill eggs, larvae and some overwintering pupae. 2. Trapping and luring to kill (1) In spring, use a sugar-vinegar liquid to lure and kill overwintering-generation adults; the ratio of sugar, vinegar, wine and water is 3:4:
-
How to Cope with Low Temperature and High Humidity During the Late Silkworm Stage
When low temperature and high humidity occur during the late silkworm stage, heating should be the main measure, raising the temperature to lower the humidity in the silkworm rearing room. The specific methods are as follows: 1. Heat the silkworm rearing room, and after the temperature rises, open the doors and windows appropriately to ventilate and remove moisture. 2. Prevent the silkworms from eating tender leaves, wet leaves, and immature mulberry leaves; appropriately reduce the amount of mulberry given each time, and do not let leftover leaves accumulate, so as to prevent the silkworm bed from becoming cold and damp. 3. Use more moisture-absorbing and drying materials such as lime to keep the silkworm bed dry. 4. During cold, rainy seasons, after the mulberry leaves are picked, store them for a certain
-
Symptoms and Control Methods of Swine Kidney Worm Disease
1. Pathogen This disease is caused by the parasite Stephanurus dentatus, which lives in the kidneys of pigs or in the fat around the kidneys and the walls of the ureters. The swine kidney worm is a thick, hard nematode shaped like a matchstick, dark red in color, with a well-developed buccal capsule. The male is 20-30 mm long, and the female is 30-45 mm long. The eggs are passed out of the body with the urine, and under suitable environmental conditions they develop into infective larvae in 3-5 days. These invade the pig through the mouth or skin, migrate with the bloodstream to the liver, and then further migrate to the kidneys and surrounding tissues, gradually developing to maturity. From the time the larvae invade the pig's body until they develop to
-
Key points for the control of the yellow cutworm
1. Morphological characteristics Adult: body length 14~19 mm, wingspan 32~34 mm. Body yellowish brown or grayish brown. Forewings grayish yellow, the transverse lines on the wing surface are not obvious, but the kidney-shaped mark, ring-shaped mark and rod-shaped mark are clear. The center and outer margin of the wing are dark brown. Hindwings white, with the anterior margin slightly yellowish brown. Egg: hemispherical, about 0.5 mm in diameter. The eggshell surface has 16~20 longitudinal ridge lines. Larva: mature larva body length 33~43 mm. Yellowish brown, glossy. The body surface is much wrinkled, with inconspicuous granules. Anal
-
How should cutworms be controlled in Angelica sinensis
Cutworms, also known as "ground silkworms" and "black ground silkworms." They belong to the order Lepidoptera, family Noctuidae. The cutworms affecting Angelica sinensis are mainly the black cutworm and the yellow cutworm, and their damage and control measures are the same. 1. Damage: The larvae damage Angelica sinensis seedlings, hiding by day and emerging at night; at the young instar stage they mostly damage tender leaves and tender growing tips, biting through the root crown and causing missing plants and broken rows. 2. Morphological characteristics: The adult black cutworm has a body length of 16-23 mm and a wingspan of 42-54 mm. The female moth's antennae are filiform, and the male moth's are bipectinate. The forewing is dark brown between the costal margin and the outer transverse line. Between the inner transverse line and the outer transverse line there are distinct kidney-shaped markings, ring-shaped markings and rod-shaped markings. The hindwing is grayish white, with the veins and margins dark brown. The abdomen is gray. The egg is hemispherical, initially milky white, later turning yellow, and grayish purple just before hatching. Mature larva: body length 37-47 mm. The head is yellowish brown, the body is yellowish brown to dark brown, with pale longitudinal bands on the back. The body surface is rough, covered with small round black granules. The anal plate is yellowish brown, with two dark brown longitudinal bands. Pupa: body length 18-24 mm. Reddish brown and glossy.
-
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
-
The "Huishan disinfection" method in integrated silkworm disease control
Disinfection is carried out after the silkworm rearing is finished. Because after the silkworms mount the cocooning frames and spin cocoons, and after the cocoons are harvested, there are often many rotten cocoons, dead diseased silkworm bodies and silkworm droppings left behind, especially during the summer and autumn rearing seasons, this is the time when pathogens are most concentrated. If disinfection is not carried out in time, it poses a great threat to the safety of rearing the next batch of silkworms, so a thorough disinfection must be carried out promptly, which is generally called "Huishan disinfection" in production. The method is mainly to gather together the various silkworm rearing tools used for rearing and mounting on the cocooning frames, first spray and disinfect them once with 1%-2% lime slurry or bleaching powder solution with 1% available chlorine, and then
条件筛选