桑赤锈病的病原菌具有只侵染桑的绿叶、新梢茎部等的特点,被害部(即病斑)肿胀,弯曲、初期浅黄色,逐渐变为橙黄色。表面呈现称为锈子腔的斑点,以后喷出鲜橙色的粉末叫锈孢子。老化衰退了的病斑变黑褐色。由于本病形成这样特异的鲜橙色病 Sang Hong rust pathogens have only infected mulberry green leaves, stems and other characteristics of the shoots, the victim (ie, lesion) swelling, bending, the initial light yellow, and gradually turned orange yellow. The surface presents spots called rust cavities, after which the bright orange powder is called rust spores. Aging decay spots dark brown. Because of this disease to form such a specific orange-colored disease