How to Prevent Common Diseases of Trees in Winter

In order to reduce the occurrence of pests and diseases in the following year, according to different wintering sites of diseases and insect pests, combined with winter pruning for comprehensive prevention and control, not only can reduce the degree of pests and diseases of garden plants, but also have the advantages of labor, drugs, and good results. Disease prevention and control 1. Diseases such as sycamore leaf spot disease, gold leaf privet leaf spot disease, gold leaf privet, coal contamination, crape myrtle coal contamination, rose coal pollution disease, rose black spot disease, and peach polluted hole. Since most of their pathogens are overwintering on litter, the deciduous weeds in garden greens must be removed in time in winter to concentrate deep-buried or burnt or high-temperature fertilizer, which can eliminate a large number of overwintering diseases. 2. For the disease of Euonymus japonicus, anthracnose and other diseases, their pathogens mostly overwinter on branches and leaves. Combine the winter pruning, cut off the branches that are harmful to the bacteria, and cut and spray the Bami 5 to 8 degree lime sulfur mixture. 3. For pathogens such as Begonia arborescens, Pyrus arborescens, and Pyrus arborescens, winterization of the spores formed on the cypress during the winter. The control method is to cut off the spore angle of Sabina przewalskii. When the winter spore heap matures at the end of winter, it is sprayed 1:2:100 times the lime multi-type Bordeaux mixture to inhibit the production of microspores in the winter spore stack. 4. For diseases such as turfgrass powdery mildew, rust, and brown spot, their pathogens overwinter on diseased leaves. The prevention method is to remove defoliation, subtilis layer and diseased body on the lawn, and reduce the bacteria source. 5. Euonymus variabilis, Fusarium oxysporum f. sp., pathogenic bacteria usually overwinter in the soil, cockroaches, cockroaches, nematodes, etc. can spread pathogens to expand the harm. The prevention and control method is to cut away the diseased foliage and treat them in a centralized manner. The organic fertilizers such as manure and compost used for winter irrigation must be fully decomposed, or mixed with pesticides, to kill overwintering earthworms and cockroaches in order to reduce the spread of diseases; 5 waves can be sprayed at the end of winter. Mido's lime sulfur prevention. 6. Populus tomentosa root cancer, rose root cancer, and paulownia witches' broom disease. The pathogens overwinter in diseased plants or tumors or in the soil. Control methods: Combine pruning, remove diseased tumors and arbuscular branches, and then use 1000 units of agricultural streptomycin or oxytetracycline for wound disinfection; excavate sick dead trees, and put them to death by using sulphur powder, ferrous sulfate, or bleaching powder. Apply 50g to 100g to disinfect the soil.

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