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果树冬季休眠季节,有许多害虫和病菌潜藏在果树粗老翘皮缝里越冬。据观察,以不同虫态越冬的有梨小食心虫、梨星毛虫、黄粉虫、梨蝽象、山楂红蜘蛛、苹果根绵蚜、枣粘虫、柿蒂虫、栗大蚜等二十多种害虫及腐烂病、干腐病、轮纹病等病害的病原体。实践证明,精细刮皮可消灭50—80%的越冬害虫及病菌的初侵染源,是预防翌年病虫害发生和蔓延的一项有效措施。科学合理的刮皮技术应掌握好以下六点: 一、刮皮树种的选择。刮皮前先要对果树进行查看,一看是否有粗老翘皮,二看是否有害虫和病原体越冬,二者都没有的幼树可不刮皮。刮皮的主要树种是十年生以上的有粗老翘皮和病斑的梨、苹果、枣、栗等果树,对不易刮皮的桃、杏、
Fruit trees in winter dormancy season, there are many pests and pathogens hidden in the fruit of the old Alice seam winter. It is observed that overwintering in different insect states Pear boreal worms, pear caterpillars, mealworms, pear stinkbugs, hawthorn spider mite, apple aphids, armyworm jujube, juvenile insects, chestnut aphids more than 20 Pests and rot disease, dry rot disease, ring rot disease and other pathogens. Practice has proved that fine scraping the skin can eliminate 50-80% of the initial infection of wintering pests and germs, is to prevent the occurrence and spread of pests and diseases the following year is an effective measure. Scientifically reasonable technology should be mastered the following six points: First, the choice of skin scraping species. Peel the skin before the first look at the fruit trees, a look at whether there are rough Alice, the second to see if there are pests and pathogens overwintering, neither of the saplings do not shave. The main types of skin scraping peels are pears, apples, dates, chestnuts and other fruit trees that are older than 10 years of age,