Cotton harmlessness and comprehensive control technology

I. Application of Harmless Prevention and Control Techniques 1. Prevention and control of overwintering pests and diseases is the basic aspect of comprehensive defense (1) Fall-turning winter irrigation: not only can improve soil permeability, especially for overwintering of cotton leafhoppers and cotton bollworms, and mortality. Above 80%, it can effectively reduce the population of insect population, and significantly reduce the incidence and harm of insect pests in the following year. In the second year of the second year of the implementation of the autumn-winter irrigation of cotton fields, the occurrence of leaf aphid is light and the incidence of disease is relatively reduced. (2) Rotation of crop rotation: The crops with heavy crops of Verticillium dahliae, cotton leafhoppers and weeds were planted in rotation to reduce the incidence of pests and weeds in the coming year. (3) Elimination of Overwintering: Starting in early March, we will control overwintering pupae on indoor flowers and greenhouse vegetables. Each pot of flowers will be injected with 3% carbofuran 5 grams, and greenhouses will be used with plops (1000 times). Prevention, prevention and control should be comprehensive, leaving no dead ends. (4) Spring irrigation and spring plowing: For cotton fields that have not been subjected to autumn winter irrigation or winter irrigation, spring irrigation with spring irrigation is conducted in early spring, which is unfavorable for overwintering survival of cotton leafhoppers and cotton bollworms, and can kill part of overwintering insects. 2. Technical measures for strengthening the spring sowing stage (1) Seed treatment: In late March to early April, select sunny days for 2 days, pick out seeds of broken seeds, seeds, yellow seeds and then cover with Weifu to increase the seed germination potential. And germination rate, enhance seedling disease resistance. (2) Soil treatment: 48% trifluralin or 96% guduol is used to remove 100% of the cotton field, and the soil is not heavy, and the soil is lightly mixed with the soil immediately after treatment, which can effectively inhibit the occurrence and harm of weeds. (3) sowing quality. Site preparation: Qi, Ping, Crushing, Loose, Net, timely sowing, seed evenly, the hole rate does not exceed 2%, sowing depth of 2 to 3 cm, film sealing the soil, the film should have 5 lighting surface, To broadcast all seedlings. Second, the comprehensive control of cotton growth and technical measures 1. Seedling control (1) the entire seedling can be cultivated three times, in the middle and late spring, the rain weather is more frequent, timely cultivator to remove the temperature and humidity in the rain, can effectively reduce the incidence of damping-off With mortality, it is conducive to the healthy growth of cotton seedlings. (2) After sowing, combining cutting and spreading, weed removal of weeds on cotton fields, and removing 3 to 5 centimeters of topsoil at the same time, can eradicate and eradicate the cotton leafhoppers on the ground tiger, cotton bollworm and weeds. (3) Planting corn traps in combination with non-cultivated cotton fields. (4) The cotton fields should be seeded, due to time, place management, early seedlings, early control, prevention of tall seedlings, rational implementation of the cotton field management techniques, promote the early emergence of cotton seedlings, nurturing seedlings, and enhance resistance. (5) Combine pest forecasting and forecasting and make spot inspections. Cotton aphids generally move into cotton fields in late May, and form central strains in early June; cotton leaf aphids move into cotton fields in mid-to late May. Under the premise of effective control of the central strain, adhere to the survey for the central aphid or small dot harmed cotton aphid, and use a sucking agrochemical to coat the stem to prevent and control. If it is found that the cotton leafhopper may develop from a single plant into a point In the film, we should resolutely “find a lap and discover that it is playing a little” and use a special miticide that kills a small number of natural enemies. To protect the natural enemies of cotton fields. 2. Prevention and treatment of budding period (1) Prevention and treatment of cotton aphid: Insist on implementing the strategy based on biological control. There are many types of natural enemies in cotton fields in our city. There are seven stars, eleven stars, many different, two stars and square spots in the ladybug category. , turtle pattern, diamond spot Qiao, even spotted hair, four spotted hair and other ladybugs; grasshoppers have large grasshoppers, Licaoqi, Chinese grasshoppers, grass color grasshoppers, common grasshoppers and so on. The number of these two types of natural enemies accounts for 90% in the cotton fields, and there are other predatory spiders, predatory mites, predators, raw bees, food flies, and insectivores. From the cotton fields moved into the cotton fields in May to the pests in the cotton fields in September, as long as the natural enemies are well protected and the relative stability of the cotton fields is not destroyed, the biological control objectives of “harm to benefit, benefit to control and harm” can be realized. During the year when cotton aphid forecast occurred, besides doing spotting, stemming, and prevention of heart droppings, Sadan, Coulter, Aimele, and imidacloprid were used in a timely manner to alternate use of pesticides with low killing power. It is forbidden to spray pesticides in cotton fields to protect natural enemies. (2) Prevention and treatment of cotton bollworm. From the prevention of adult overwintering and adults of the overwintering period, the use of Yangzhi, and the trapping of maize traps to reduce the amount of eggs they oviposit in the cotton fields, and the use of the habits of their adults in spawning, the cotton leaves were sprayed with superphosphate. Potassium dihydrogen phosphate or potassium dihydrogen phosphate has a significant effect on reducing the spawning rate of cotton bollworm. Applying the dilute amine can make the cotton grow steadily, which can avoid the bollworm feeding in the young part of the spawning; it will take out the toppled leaves and bring them out of the field. Dispose of it outside. Some eggs and hatching larvae of H. armigera can be eliminated. The amount of natural enemies in cotton fields is large, and the control of the third-instar larvae and eggs can reach 80%. For the second generation of cotton bollworm to achieve control indicators of the field, the leaves were sprayed with "902" insecticide or multi-faceted or eding-ding EC, one week after the larvae mortality rate of more than 80%. (3) Prevention and control of cotton leafhoppers: adhere to the six-word prevention and control policy of “checking, inserting, painting, wiping, pulling, and spraying” to control the occurrence of cotton leafhoppers at the spotting stage. In the investigation work, cotton farmers did a good job of self-examination and found that the central strain of cotton leafhoppers should immediately wipe out or pull out the leafhoppers, and remember to mark the sites where the central strains and spotting occurred. In the cotton field where spotting takes place, the special killing agent or efford that has a small killing effect on natural enemies must be used for prevention and control in time to avoid the spread and harm. 3. Control of cotton with brown and wilt disease 1. Plant disease-resistant varieties. In the past two years, the new disease-resistant variety Xinluzao No. 12 has been greatly reduced, which has greatly reduced the occurrence and harm of cotton browning and wilt disease, and showed a better performance through the cultivation of new varieties. Good disease resistance and high yield. 2. To strengthen field management and improve the cotton plants' own stress resistance can reduce the incidence of yellow wilt. 3. In the bud stage, combined with foliar application, fertilization, and spraying green wind 95, can effectively reduce the incidence.

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