病害锈病染病的叶面产生黄褐色疤状病斑,表皮破裂后散出褐色粉末,这是病原菌的夏孢子堆,8月至9月份形成黑褐色冬孢子堆,从而导致叶片枯黄脱落。防治方法:清除病残株,集中销毁。发病初期用15%三唑酮可湿粉1000倍液或97%敌锈钠可湿粉400倍液喷雾防治。褐斑病叶片上病斑圆形或不规则形,直径1毫米至2毫米,中心部位黑褐色,边缘褐色,两面均有灰黑色霉 Diseases of rust disease The leaves produce brownish brown spots, after the epidermis rupture brown powder, which is the pathogen of summer spores, from August to September the formation of dark brown winter spore pile, resulting in the leaves fall off. Prevention and treatment methods: remove diseased strains, concentrated destruction. Early onset of 15% triadimefon WP 1000 times or 97% of the enemy rust sodium wettable powder 400 times spray control. Brown spots on the leaves of the disease spotted or irregularly shaped, 1 mm in diameter to 2 mm, dark brown center, brown edge, both sides are gray mold