Preparation of artificial feed Preparation of artificial feed requirements: 1. Meet the nutritional needs of silkworms. The feed should contain various amino acids, carbohydrates, lipids, vitamins, vitamins, inorganic salts, and moisture necessary for silkworms, and maintain a proper content ratio. 2. Meet the silkworm's diet. That is, the feed should contain substances that promote silkworms to ingest food actively, without evasive substances. 3. Have the appropriate physical properties. Feed hardness is related to the type of molding agent and the moisture content. Excessive or too soft can affect silkworm feeding. The average silkworm stage moisture content is about 75%, and the large silkworm stage can be about 70%. In order to facilitate cutting and feeding words, it should not be too sticky. 4. Not easy to spoilage. Formulated with preservatives and antibiotics such as sorbic acid, propionic acid and chloramphenicol. There are many formulations of artificial feed, some contain mulberry powder, and some do not contain. Other ingredients include potato rings, sucrose or glucose, soy flour, citric acid, vitamin C, vitamin B, inorganic salts, cellulose, and the like. The environment for artificial feeding for breeding is more strict than the mulberry leaf culture. 1. The breeding site must be strictly sterilized to ensure asepsis to prevent deterioration of the feed pond. 2. Young silkworm rearing temperature higher than the mulberry leaves, generally 20-30 °C, less than 25 °C when the growth was bad camp. 3. The relative humidity is kept in the range of 85-90%. When the humidity is too low, the moisture content of the feed rapidly decreases, and the amount of food consumed by the silkworm decreases. Breeding air speed is generally not more than 10 cm / s. However, in order to adapt to the physiological requirements of silkworms and to promote eating together, the humidity should be reduced to about 65%. 4. Dark feeding is generally used. It is easy to cause oxidative deterioration of feed due to light. Feeding methods Wet materials are generally cut into strips or sheets using a knife, a planer or a bait, or pressed into a large sheet and placed in a silkworm seat so that the silkworm can feed on the web. In the case of dehydrated dry feed, it can be fed directly with water after being moistened. Usually it is once a day, but it may be 2 times in l, 2 in 1 or 3 in 2 depending on the type of artificial feed and the feeding method. Each box of silkworm eggs (20,000 eggs) in 1-3 instars requires about 15 kg of artificial diet (wet weight).
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