四环素治疗杏李树细菌穿孔病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，使其果... Tetracycline treatment of apricot plum bacterial perforation Bacterial perforation occurred in the leaves of apricot, plum, mainly for the emergence of the front leaf spot, lesion from small to large, expanded into a round or irregular, reddish-brown, Around a halo of halo, and later the spots dry off into perforation; occurred in the fruit brown spots and cracks. This disease seriously affects apricot, plum’s photosynthesis, so that ...