Autumn silkworm rearing relates to 60% of the annual mu harvesting efficiency and feeding volume. It is of utmost importance. The following measures should be well taken care of: To strengthen the mulberry garden, the first step is to have sufficient fertilizer. Before August 20, 1,000 kg of manure is applied per mu. 20 kg of standardized fertilizer; in early September, 0.5% concentration of urea solution was sprayed on the leaves of the roots twice to make the mulberry leaves turn green and tender. In addition to eradicate pests, it should be sprayed with 20000 times of 20% solution of methomyl emulsion over 10 days before sericulture, and spray once more every other week. If pests are bred during the sericulture period, sprays should be zoned. Mulberry is afraid of drought, but also afraid of embarrassment, it should be timely to do a good job of mulberry irrigation and drainage work, improve leaf quality. At the same time pay attention to the rational use of leaves. Autumn silkworm 1-3 instar, from top to bottom selection of suitable mature leaves, 4 instar and 5 early in the middle of the shoots suitable for ripening middle leaves, 5 in the middle and later stages from the bottom to top leaves. The reclaimed mulberry leaves should not be stacked and must be stored properly. In the mid-autumn silkworm period, each mulberry preserves 8 to 10 mulberry leaves, and the late autumn silkworm ends. Each leaves 3-4 leaves, allowing the mulberry tree to continue its photosynthesis and increase the yield of spring leaves in the coming year. Strictly sterilize, prevent disease, and cultivate silkworm 5-7 days before, do a good job of completely sterilizing the silkworm silkworm, scoop the soil (wash the cement floor repeatedly with water) and replace the new soil; put all the silkworms into the live river for half a day, Wash thoroughly on the front and back, wash silkworm feces, dead silkworms, floating silk, stains, etc. Silkworms are used for silkworm body disinfection at each age, and if the virus disease occurs, fresh lime powder is sprayed 1-2 times a day; if there is a disease, a poison is dispelled and prevented every day. Powder or superior chlorine anti-static powder). After the cocoon was sold, a layer of fresh lime powder was sprinkled on the surface of the silkworm room and formalin was sprayed on the silkworm to extinguish the source of the disease. Strengthen the feeding and management of silkworm mulberry silkworms, and the development of silkworms is not uniform, and it is easy to attack silkworms. The high-yield experience is: selecting plots, selecting plants, selecting stalks, selecting leaves, and conscientiously doing a good job of mulberry leaf storage, sericulture households with higher sericulture levels should be selected for small silkworm communal breeding, and small silkworms do not infect pathogens. Large silkworm harvest lays the foundation. In addition, silkworms consume more energy during sleep, and their resistance is weak. They should be able to “eat before sleep, manage well during sleep, and eat at a proper timeâ€. If the silkworms are not fully developed, they should start eating in batches to prevent them from getting hungry. Keep quiet during sleep, prevent strong winds from blowing, and affect the peeling of silkworms. In order to improve the feeding environment, the temperature of late autumn silkworm is getting lower, and indoor warming must be done to meet the needs of the growth and development of the silkworm. Comprehensive small-scale cocoon bed education, the promotion of temperature-controlled electric heating stacked silkworm syllables, if there is no gong bed or silkworm period heating, should add 5% -10% of fresh lime powder and a small amount of water in anthracite, mix well, Made of briquettes burning, or with a closed furnace to take over, can prevent poisoning by hydrogen sulfide. The windows should not be crumbled or sealed with mud by materials such as plastic film, so that there is a convection window in the north and south, which is both warm and ventilated. In order to reduce the loss of silkworms and keep the silkworms cool, generally small silkworms do not eliminate sand at the 1st instar age, but they do not only have to remove sand at the 2nd age, but also sleep and remove one time. Large, need sand removal, sand removal 3 times in the 4th age, sand removal 1 time in the 5th age, first scorch or lime powder before each sand removal, feed 1-2 back leaves, basically no net When silkworms are used, sand can be removed. Due to the seasonal relationship, the autumn silkworms in the two phases are only about 15 days apart. They are often nested. If the silkworms are infected, small silkworms will infect, and silkworms will develop in late autumn. Therefore, the silk caterpillars must be kept in the late autumn. Absolutely separate.
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