Preparation for spring silkworm rearing
First, do a good job of Mulberry Park's spring management
The season of the year lies in spring, which shows that the spring management of crops is the key to the growth of crops. Mulberry gardens are also well managed. Not only can spring leaves yield high yields, but they also lay the foundation for the harvest of summer and autumn mulberry leaves. To this end, silkworm farmers must do the following work.
1. Ditching drainage: Due to more rain in spring, the mulberry field water will affect the absorption of mulberry root, and when it is serious, it will cause mulberry yellow, small and thin. Therefore, it is necessary to open a good mulberry garden drainage ditch with a ditch depth of about 30 cm. After the rain, there was no water in the mulberry field.
2. Application of spring fertilizer: spring fertilizer in the mulberry before germination, also known as germination fertilizer, should be based on the application of quick-release fertilizer, the general spring fertilizer sub-application, the first time in mid-March, ammonium per acre applied 50 to 80 kg, the second time in mid-April, the application of 10 to 15 kg of urea.
3. Weeding in mulberry fields: In the spring, due to more weeds in mulberry fields and competition for mulberry trees, we must do a good job of weeding in mulberry fields. Mulberry weeding in the spring is generally performed before the mulberry bud is dislocated, so as to prevent the mulberry shoots from being damaged during the weeding process, resulting in reduced production.
4. White stripe insect pests: pests that damage spring mulberry buds include mulberry caterpillars, wild silkworms, mulberry mulberries, and mulberry leafworms. The control time is when the mulberry sprouts. Use the pesticide phoxim 800 times or 80% dichlorvos 800 times. (Note that special sprayer must be used).
5. Mulberry root dressing and picking core: root dressing: generally use 0.5% urea (50 kg water plus 0.25 kg urea) or 0.2% potassium dihydrogen phosphate spray on the mulberry (note that the sprayer must be dedicated, beware of silkworm Poisoning. Picking cores: Before the spring silkworm leaves a large number of leaves (7-10 days, ie 4 instars), the tender heads of the new shoots are removed, which promotes the enlargement and thickening of the leaves, improves the leaf quality and yield, and the mulberry tree can increase the yield by 5-8. %. It is particularly important to reduce the risk of the next generation in areas where mulberry mosquitoes are infested, and the time is spent 7 to 10 days before the leaves are used.
Second, do a good job of sterilization before silkworm rearing
There are a large number of pathogens in houses, utensils, the surrounding environment, and piles of silkworm sand, old clusters, and dead pools that have been used to keep silkworms and clusters, and pathogens have strong vitality. If the spores can survive in the room for 2 to 3 years and survive in the water for 20 months, the septic virus can survive for 8 months in a dry environment and 20 months in a dark and humid place. In order to ensure the disease-free and high-yield of the silkworm, Must thoroughly grasp the thorough disinfection before sericulture.
Before the sterilization of sericulture, according to the routine steps of “sweep, second wash, three-scrape, four-brush, five-eliminationâ€, the following issues should be noted:
1. Pay attention to environmental disinfection: At present, most sericulture households do not have special silkworm sheds, and human silkworms share a room, and disinfection is difficult. Therefore, before sericulture, the indoor, outdoor, and surrounding environment of sericulture and sericulture housings should be cleaned first. Eliminating waste, removing sewage, eradicating weeds, and then disinfecting with fresh lime slurry or "disinfecting" diluent, creating a safe, non-toxic environment for cannibalism.
2. Select high-quality, high-efficiency, new-style, broad-spectrum “disinfection net†as the head of disinfectant, do not use expired or damp-failed and other unqualified agents to ensure the quality of disinfection, but can't use “insecticide†as the silkworm silkworm Disinfect the medicine so as not to cause poisoning.
3. Improve the disinfection method: a change "a disinfection to a secondary disinfection." That is, for the first disinfection, the sericulture households can use the antibacterial agent “402†from 1500 to 2000 times to disinfect the silkworm silkworms according to the incidence of their own sericulture. Disinfection with 5% fresh lime slurry; second disinfection in one week before silkworm rearing, choose broad-spectrum agent "disinfection net" dilution (disinfection net plus 25 kg water) for disinfection, or for the first time Disinfection is carried out with a “disinfecting net†diluent, and the second time it is sterilized with smoke, so that the liquid and gas are combined to make up for each other and the disinfection is more thorough. Second change "spray disinfection for impregnation disinfection." Silkworms are suitable for impregnating and disinfecting as much as possible by impregnating and disinfecting. When impregnating and disinfecting, if the number of silkworms is large, a newly prepared fresh liquid medicine should be added in the middle to supplement the concentration of the liquid medicine so as to ensure the disinfection effect. Disinfection work should also pay attention to the preparation of pharmaceutical standards, spray in place, and keep it wet for more than half an hour, and then dried for use.
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