桃树缩叶病是为害桃树的严重病害之一,在天气干旱的年份更为猖厥。缩叶病的病菌孢子主要是在芽鳞或树皮上越冬,春天桃树发芽展叶后侵入嫩叶。4月下旬至5月中旬是发病的高峰时期。被害叶片肥厚、隆肿,叶缘翻卷,初为红色,逐渐变成褐色,叶面上生一层灰白色孢子,最 Pear tree leaf disease is one of the serious pests damage pests, in the dry weather, the more rampant. Leaf spring disease spores mainly in the bud scales or bark overwintering spring peach sprout leaves after infiltration. The end of April to mid-May is the peak incidence. Victims of follicular hypertrophy, swelling, leaf margin curling, the beginning of the red, gradually turned brown, a layer of gray-white spores on the foliage, the most