果树在冬季时期的病虫害防治,主要措施如下:①清扫园地。果树的许多病菌和害虫,如苹果的褐斑病、圆斑病、炭疽病、梨的黑星病,轮纹病、桃的褐腐病、葡萄的褐斑病菌等,山楂红蜘蛛、梨花网蜻、葡萄二星叶蝉等害虫,都是在枯枝落叶、荒草及僵果中越冬。因此,果树落 Pest control of fruit trees in winter period, the main measures are as follows: ① clean the garden. Many of the germs and pests of fruit trees, such as apple brown spot, circular spot, anthracnose, pear’s scab, ring rot, peach brown rot, grape brown spot bacteria, hawthorn spider, pear network Dragonfly, grape two leafhopper and other pests, are in the litter, weeds and winter fruit in the stiff. Therefore, the fruit trees fall