三、锈病锈病主要侵染叶片和花梗。初在表皮上产生纺锤形或椭圆形隆起的橙黄色小疱斑,为夏孢子堆。病斑周围具黄色晕环,后扩展为较大疱斑,其表皮破裂后,散出橙黄色夏孢子。叶两面均可染病,后期叶及花茎上出现黑色小疱斑,为病菌冬孢子堆。病情严重时,病斑布满整个叶片。 Third, the rust rust The main infection leaves and pedicels. Initially produced in the epidermis spindle or oval bulge orange yellow blister spot, as summer spore reactor. Blot around the yellow halo, after the expansion of larger blisters, the epidermis rupture, scattered orange yellow spores. Leaf on both sides can be infected, the late leaf and flower stems appear black small blister spot, for the pathogen teliospores. Serious illness, the plaque covered the entire leaf.