四环素治疗杏李树细菌穿孔病彭锋细菌穿孔病发生在杏、李树的叶片上，主要表现为叶片正面出现病斑，病斑由小到大，扩大成圆形或不规则形，呈红褐色，周围有淡黄色的晕圈，后来斑中间干枯脱落成穿孔；发生在果实上有褐色圆斑并有裂纹。此病严重影响杏、李树的光合作用，使... Tetracycline Treatment of Apricot Plum Bacterial Perforating PENG Feng Bacterial perforation occurs on the leaves of apricot and plum trees, mainly manifested as the emergence of a lesion on the front of the leaves, lesion from small to large, expanded into a circle or irregular shape, red Brown, surrounded by a halo of light yellow, and later the spot dry off into perforation; occurred in the fruit brown spots and cracks. This disease seriously affects apricot, plum’s photosynthesis, so that ...