Winter is the best time to prevent or treat diseases and pests of fruit trees throughout the year, which can play a multiplier role. Apple pests such as apple fruit moths, pear borers, apple leaf roller moths, peach moths, and tea-winged pheasants, often overwinter under old bark, skin cracks, or subtilis; peach pests, beetles, grape beetles, and other pests Overwintering in the soil; such as the early deciduous apple leaves were infected with miscellaneous black spots, ring veins, peach brown rot and other pathogens, and they all overwintered under litter and weeds. For the various wintering sites for diseases and pests, the following comprehensive prevention and control measures shall be taken during the autumn and winter seasons. 1. Any kind of orchard in the Qingyuan Garden shall be thoroughly cleaned after winter, and litter, weeds, etc. shall be burned or piled together.沤 Fertilizer. Another combination of winter pruning, removal of dead buds, nuts and so on. Thoroughly eliminate wintering pests and habitats. Second, scraping the skin is best carried out in the late autumn and winter, scraping the skin to a small tree and weak tree scraping (only scratch off dead skin), big tree Wangshu heavy scraping (scraped to the cortex yellowish green). After scraping, disinfect with lime sulfur. Three, ploughing before and after the beginning of autumn, under the fruit trees deep 20 to 30 cm, in order to destroy the wintering environment of pests, resulting in bacteria, pests killed at low temperatures. Fourth, white coating of white fruit trees in winter can reduce frost damage, but also eliminate overwintering pests in the bark and cracks. Preparation of whitening agent: 12 parts of quicklime (open with cold water), 1 part of salt (open with hot water), 2 parts of bean powder (stir in warm water), 3 parts of lime sulfur cocktail, 40 parts of water, stir Serve whitening agent. The whitening time is best performed after defoliation and before the soil is frozen. 5. To tie the grass before and after the fall of the frost in the big branches of fruit trees tied grass, trap insects into winter, about the end of December to remove the grass to burn. Sixth, the best chemical control after pruning and before the budding spray, can be used 3 to 5 degrees of lime sulfur or diesel oil containing 4% to 5% of the emulsion, even spraying, the effect is good.
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