The production of silkworm has ended and the summer harvest of mulberry trees has entered a new round of growth cycle. The management of mulberry fields after the summer harvest is not only directly related to the production and quality of the mulberry leaves in the summer and autumn of this year, but also the production and quality of spring leaves in the coming year. Important basis.
First, re-application of summer cutting fertilizer: mulberry trees after the summer to late July to fertilizer for summer fertilizer, fertilizer accounted for 40% of the year. After mulberry trees were cut in the summer, they re-emerged in about 7 days and entered the second growth peak, which was the most prosperous year in the year. The summer fertilizer is generally applied in two separate batches. The first one is applied immediately after the summer harvest, and the latest is no later than June 20. The combination of organic fertilizer and inorganic fertilizer, such as semi-mature manure and compost, is added to the compound fertilizer. Mushi is applied to farmyard manure 60 lbs + compound fertilizer 100 kilos to promote early germination of mulberry trees; the second is applied after mulberry sapling buds are applied with 25 kg of urea per mu and 15 kg of superphosphate, no later than the end of July. The main fast-acting fertilizer. The ratio of N, P and K should be 5:2:3. As much as possible to increase the proportion of organic fertilizer, nutrients from organic fertilizers generally account for about 50%.
Second, the mulberry field grass cover: Mulberry after the summer sun is sunny, weeds grow rapidly, the straw is spread on the mulberry garden noodles, to grass cover grass, control the growth of weeds, not only can comprehensive utilization of straw, reduce environmental pollution, It can also maintain soil looseness and rainwater absorption, reduce water evaporation, inhibit weed growth, improve mulberry drought resistance, increase soil organic fertilizer content, and increase mulberry leaf production. The thickness of grass cover should be about 10-15cm, and about 2,000kg per mu. It is best to use a combination of pest control to spray grass through the spray and prevent pests from growing. At the same time, it can be combined with dredging the mulberry water system to cover the straw and promote the straw. corrupt.
Third, to clear the water system: summer and autumn is the period of more concentrated rainfall, mulberry gardens are easy to see dark stains, resulting in the loss of fertilizer efficiency, while the mulberry soil after submergence lack of oxygen, sang roots difficulty in breathing, if the weather turns fine, the root system The amount of water absorbed could not meet the transpiration of the shoots on the shoots. The mulberry leaves will wilted and fall off, the mulberry resistance will decline, and diseases such as mulberry diseases will be induced and even cause death. Clearance should be cleared in a timely manner so that the gutters can communicate with each other and the rain will stop.
IV. Treatment of Silkworms and Silkworms: Dead silkworm, silkworm excrement, and excrement contain a large number of pathogenic bacteria. The silkworm sand is not well treated, and the pathogen spreads to the mulberry leaves, silkworm worm, and mulberry grove on the mulberry leaf and becomes the next silkworm stage. The main source of infection, causing cross and horizontal transmission. The occurrence of pyogenic disease in this spring is wider. Therefore, the silkworm sand cannot be thrown in disorder, and it cannot be used for drying purposes. It must be kept away from the Jamsil and Mulberry Parks. It is forbidden to apply silkworm sand directly to the mulberry garden and have been applied to the silkworm sand of the mulberry garden, combined with dredging of the water system, covering it with soil to prevent the spread of pests and diseases.
Fifth, timely sparse buds: after the summer mulberry tree, it will re-emerge a large number of new shoots, when the new shoots grow to 15-25 cm to sparse a part of it, the time should be in the end of June to mid-July, so stay weak and strong To stay strong and stay strong, with sparse sparse openings and sparse stays, sparse sparse stays at the dense spots, and more stays at the periphery, reaching the appropriate number of mulberry trees, evenly distributed, and airy and translucent. The general total number of 6,000 to 7000 per mu is appropriate, or leave 5-8 roots per plant. In particular, in mulberry fields where mulberry diseases occur, we must promptly remove the diseased branches and remove them from the mulberry field to destroy the pathogens.
Sixth, pest and disease control: summer and autumn are high incidence of mulberry field pests, according to the current situation of mulberry pests and combined with meteorological data, it is forecast that this summer and autumn mulberry pests will focus on the occurrence of prevention and control is difficult. Please pay attention to the silkworm farmers, grab the current small mulberry tree crown, a long time from the autumn silkworm gap, facilitate the favorable period of operation, take effective measures to regulate and control, control mulberry, mulberry, mulberry disease, leaf roller moth, red spider, mulberry The development, reproduction, and spread of pests and plagues in mulberry fields such as horses and grunts reduce the number of pests and worms, reduce the pressure in summer and autumn, and lay a solid foundation for the harvest of high yields in autumn.
1, suitable for prevention and treatment. Pest control period is generally in the small period of the pest larvae, appropriate control, prevention and control costs, small workload, high control efficiency, so silkworm farmers should be based on the city of mulberry disease information, appropriate control.
2, using Mulberry special agents. The mulberry garden special agent has high control effect on mulberry pests and is safe to silkworms. When using, according to the standard dose dispensing, medication, shall not be added, disorderly, unauthorized increase the dose, otherwise it will cause damage to the mulberry or extend the safety interval of the silkworm, affecting the production of sericulture.
3, using Mulberry special sprayer. Sprayers for pest control of rice or other crops often have residual pesticides. Some pesticides have high toxicity to silkworms. If they are used in mulberry fields, they are likely to cause poisoning in silkworms. Therefore, special sprayers for mulberry fields are used to ensure the safety of silkworms.
4. Control insects should be carried out before 10 o'clock in the morning or after 4 o'clock in the afternoon. Do not use drugs in the hot sun to ensure efficacy and safety of humans and animals.
5, spraying a comprehensive and thoughtful, the amount of liquid should be sufficient. The mulberry must be thoroughly sprayed and wetted thoroughly, and the ground and sandwiches should be sprayed. The amount of mulberry medicinal liquid per acre should not be less than 6 sprayers in July and not less than 8 sprayers in August.
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