Fruit tree pests and diseases harm seriously affect fruit production and quality. The pests that destroy fruit trees in autumn can receive a multiplier effect. In the autumn, the following methods are used to exterminate fruit trees: First, remove fallen leaves in autumn and winter seasons, combine pruning to remove the diseased shoots and insect shoots, and remove the weeds and litters near the orchard and its surrounding areas, and treat them in a centralized manner to eliminate a large number of overwintering pests. Second, cultivating and cultivating garden fields is not only an important measure to improve the soil and promote fruit tree production, but also an effective method to eliminate overwintering pests and diseases. Through ploughing, the deep soil pests and pathogens can be turned to the surface and frozen to death, dry or eaten by natural enemies, so that buried insects can not be feathered and suffocated, thereby reducing the overwintering base. Third, the trapping and killing pests use pests to select the sites for wintering. After the fall, the grasses are tied to the big branches of fruit trees or broken into sack pieces to trap pests and larvae to overwinter. Then they are intensively killed. According to the survey, this method has a 47-78% effect on the trapping of P. edulis and P. edulis, and it is also very good for spider mites, red spiders, leafworms, leaf spines, leaf roller moths, and leaf roller moths. The trapping effect, especially when the density of overwintering worms was greater in the year, was more pronounced. IV. Chemical control In the deciduous dormancy period of fruit trees, lime sulfur is sprayed for 1-2 times at 5 degrees of Baume. It affects a variety of scale insects, red spiders and apple rot disease, pear tree scab, and grape black pimples. Diseases, etc., have a significant control effect.
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