蕹菜白锈病在夏季普遍发生,一般发病株率达25%左右,重者达50%以上,病叶率达15%左右,不仅导致减产,且品质明显下降。一、症状和诊断。该病主要为害叶片和茎部。初发病时,叶片正面初现淡黄绿色至黄色斑点,直径7￣15毫米,后逐渐变成褐色,叶片背面生白色隆起状疱斑,近圆形至不规则 Irregular occurrence of white rust rust in summer, the general incidence of about 25% of plants, severe cases of more than 50%, sick leaves rate of about 15%, not only led to reduced production, and the quality decreased significantly. First, the symptoms and diagnosis. The disease is mainly affected leaves and stems. Initial onset, the front of the leaves appear yellowish green to yellow spots, 7 ~ 15 mm in diameter, and then gradually turned brown, white backs on the leaves of the bullous blister spot, nearly circular to irregular