Flower fruit tree tumor prevention and treatment method
Because the disease is rough and swollen, the disease is also called cancerous disease. It is mainly caused by the roots and stems of plants infected with certain species of bacillus, coryneform bacteria, and pseudomonas. The disease occurs throughout the country, the host is very wide, there are woody plants and herbs. Such as cherry blossoms, rose, Chinese rose, plum, Podocarpus, arbutus, ginkgo, cypress, cypress, bayberry, forget-me-nots; there are peaches, cherries, walnuts, grapes and other fruit trees. Premature decay of the victim plants, poor growth and development, and finally the whole plant died. First, the symptoms of this disease occurs at the root of the neck, the main root, lateral roots, the main trunk, lateral branches. Herbal flowers such as forget-me-nots at the branch of the main stem, especially at the junction of branches; cherry tree stems and branches occur; cherry blossoms and roses occur mainly at the root neck; peaches, walnuts, grapes occur in the underground Roots. In all the above-mentioned affected parts, the early enlargement was nearly spherical nodules, the young tumors were light in color, soft in texture, and smooth in surface. Afterwards, the tumor enlarges, the texture hardens, it turns yellow, brown to dark brown, and the surface is rough and cracked. Tumors vary in size and shape. The affected plants grew poorly, with less flowering and early defoliation, and finally the whole plant died. Second, the incidence of pathogenic bacteria can be in the diseased tissue or in the soil of the disease on the body more than a year. After two years of incurring no chance of infection, bacteria will lose their virulence and viability. Pathogenic bacteria are spread by irrigation water and rainwater, pruning, mining, grafting, farming tools, and underground pests. Long-distance transmission depends on seedlings and cuttings. The pathogenic bacteria mainly invade from the wound. The incubation period lasts from several months to one year and symptoms occur. Orchards with high humidity generally have a high incidence. The incidence of cutting is higher than that of bud grafts, and the incidence of many soil pests is heavy. III. Prevention and control measures (1) Clearing the park: Exclude serious and diseased plants and burn them in time. Use 50% thiram with WP or 70% pentachloronitrobenzene 5 g with 2 kg of fine soil. In the pit. (2) Rotation: For annual plants, two years or more of rotation is used. (3) Reasonable fertilization: Can not be applied to poultry manure without maturity. (4) Chemical control: 1 The above ground cancer is removed and the wound is then smeared with 800-1000 ppm of streptomycin or oxytetracycline; 2 The aboveground tumor can be sprayed with 50% DT 500 times the initial stage; or 50 % Feng Huo'an 500 times fluid; or 77% can kill 500 times fluid, once every 7 days, even spray 2 or 3 times. 3 underground cancer, can also be removed, cut wound protection after application, but also can be used 1000 ~ 2000ppm streptomycin or oxytetracycline irrigation diseased plants; or neophytin 4000 times or 27% copper noble 400 times Irrigation root. The amount of liquid used is 500-1000 ml/plant, depending on the size of the plant. Once every 10 days, it can be filled 2 or 3 times.
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