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What methods are there for identifying the health status of grown silkworms?
1. Smell with the nose. When entering the silkworm room, smell the odor in the room. If the room has only the fresh scent of mulberry leaves and no other strange odor, it indicates that the grown silkworms are disease-free. 2. Listen with the ears. After feeding mulberry leaves, if the sound of the silkworms eating mulberry leaves is heard like the rustling of light rain, it indicates that the grown silkworms are healthy. 3. Look with the eyes. Observe the body color of the silkworms. Healthy silkworms generally have a blue-white body color. Silkworms at the peak of feeding have tight, glossy skin and are lively in movement, raising their heads and thoraxes when resting; the dorsal vessel beats rhythmically; the group develops uniformly in size; the feces have a certain shape (except for mature silkworms),
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Common symptoms of silkworm poisoning and prevention methods
Pesticide poisoning: 1. The pesticides that commonly cause silkworm poisoning fall into several major categories, including organophosphates, organonitrogens, pyrethroids and botanical insecticides. Various pesticides enter the silkworm body through contamination of mulberry leaves, rearing rooms and rearing tools, and the air, and cause poisoning when the silkworms eat them, breathe them in through the spiracles, or come into contact with them. 2. After pesticides enter the silkworm body, three effects may occur: activation, accumulation and detoxification. Most pesticides can accumulate or become activated and cause silkworm poisoning. The common symptom of poisoning by all kinds of pesticides is a sudden stop in feeding on mulberry leaves. Also, because the chemical drugs differ in composition and structure and have different properties,
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Rearing Methods and Management Key Points for Male Silkworm Larvae
I. New Hybrid Male Silkworm Varieties (1) Variety characteristics. The new autumn-rearing male silkworm variety Qiuhua x Ping 30, bred by the Sericulture Research Institute of the Zhejiang Academy of Agricultural Sciences, has the advantages of a strong constitution, uniform molting and rising in each instar, and being easy to rear. The number of silkworm larvae per gram is about 2310, the 5th instar lasts 6 days and 18 hours, the whole instar lasts 22 and a half days, the two-day hatching rate is 49.34%, the silk length is about 1240 m, the cocoon shape is oval, large and uniform, the cocoon color is pure white, and the cocoon shell rate and silk yield are high. (2) Key points of rearing technology. For gathering newly hatched silkworms, light exposure can be
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Detailed Explanation of the Processing Methods and Operating Steps for Stiff Silkworm
Heat the wok, add wheat bran and stir-fry until it smokes, then add the dead silkworms, stir-fry slowly until they turn slightly yellow, then remove from the wok and sift, cool and package to obtain the finished product. Generally, a qualified product is cylindrical, mostly curved and wrinkled, 2-5cm long, 0.4-0.7cm thick, with a slightly yellow body surface; hard and brittle, easy to break, with a flat cross-section, varying brown-black color, mostly glossy, with 4 brown shiny rings; slightly putrid odor, slightly salty.
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Raising red worms as feed for turtles and soft-shelled turtles delivers high economic returns
In turtle and soft-shelled turtle breeding ponds, small red worms often appear, swimming in clusters and sheets on the pond surface and in the corners, forming a layer of red water bloom on the water surface. The real name of the red worm is Cladocera, and it is a type of zooplankton in water bodies. It is composed of many planktonic flea species, with an average body length of about 1 mm. The normal body color of Cladocera is grayish white; it turns red only when the water is lacking oxygen, which is why red worms are mostly found in foul ditches. When large numbers of red worms are found in a turtle or soft-shelled turtle pond, it indicates that the pond water has begun to deteriorate,
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What are some simple methods to get rid of pig roundworms?
① Use 300 grams of pumpkin seeds, grind them into powder, mix with a small amount of feed, and feed it to the pig in two portions on an empty stomach, but be careful not to feed it after roasting. ② Take 1 to 1.5 kg of malt (determine the amount according to the size of the pig), grind it, and let the pig eat it all at once; the effect is also very good. ③ Use the common four-season red radish leaves found in rural areas and let the pig eat them freely; this also has a certain effect on preventing and treating roundworm disease. ④ To treat biliary roundworms in piglets, use an appropriate amount of vinegar (about 60 ml), heat it slightly, and give it to the pig once
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What types of silkworm diseases are there? A full analysis of common types
Silkworm diseases can be divided into two categories: one is infectious diseases, and the other is non-infectious diseases. Any disease caused by pathogenic microorganisms such as viruses, bacteria, and fungi invading the silkworm body and then multiplying is an infectious disease. It can be transmitted from diseased silkworms to healthy silkworms and is an important factor affecting sericulture production. Any disease of silkworms caused by attacks by arthropods (fly maggots, lice mites), pesticide poisoning, and mechanical trauma is called a non-infectious disease. It cannot cause healthy silkworms to become ill through silkworms as a medium, and it is also an important factor affecting sericulture production.
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New Silkworm Variety Officially Passes Variety Approval
The new silkworm variety "Qiantang × Xinchao", bred by the Sericulture Research Institute of the Zhejiang Academy of Agricultural Sciences (postcode: 310021, tel: 0571-86404188), recently passed variety approval in Zhejiang Province. For this variety, the pupation rate of silkworms from the start of the fourth instar is 94.9%, the cocoon yield per 10,000 larvae is 3.9 kg, the reelable silk length is 755 m, the neatness is 95.8 points, the practical hatching rate is 98.7%, and the silk filament size is 2.5 denier. The average cocoon yield per box of silkworm eggs is 41.3 kg, and the output value per sheet of silkworm eggs is 974 yuan.(
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Control Methods and Technical Key Points for the Jujube Inchworm
Also known as the jujube looper or "arched-back worm," it is the "number one enemy" harming jujube trees. Its larvae damage young buds, young leaves, and flower buds, and spin silk that tangles and hinders leaf expansion; in severe cases they can strip all the leaves, while also causing heavy damage to crops such as apple, pear, peach, potato, and chili pepper. The jujube inchworm begins to emerge from the soil in mid-March, and when the jujube buds begin to swell, the larvae start hatching and damaging the jujube buds. Its main biological characteristics are: 1. One generation per year, overwintering as pupae concentrated in the surface soil around the root collar of jujube trees;
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Detailed Introduction to the Silkworm Variety Yuefeng No. 3
Approval number: Yue Shen Can 2006002. Breeding units: Guangdong Province Sericulture Technology Extension Center, Department of Sericulture Science, College of Animal Science, South China Agricultural University. Variety source: Wu/Xuan//28/32. Characteristics: A bivoltine four-way hybrid variety with polyvoltine bloodlines. It has the characteristics of a strong constitution, resistance to high temperature and high humidity, resistance to fluorine and air pollution, ease of rearing, high yield, excellent cocoon silk quality, and a high silkworm egg multiplication coefficient. Hatching is uniform and synchronized; the newly hatched larvae of the orthogonal cross are relatively quiet, while those of the reciprocal cross are more prone to wandering. During the young silkworm stage there is dense
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