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苹果斑点落叶病近几年在我省各地苹果产区有日益发展的趋势,是仅次于苹果腐烂病的第二大病害。我场于1991年开始发病,易感品种有青香蕉、之帅、红星、新红星、首红、顶红、纽红等元帅系列品种;金帅、国光等次之。 一、发病特点:侵染快、发病急、并造成大量落叶。降雨早、高温多雨则发病重,反之则轻。尤其4月底—5月
Apple spot leaf decay in recent years throughout the province apple growing areas have a growing trend is second only to apple rot disease the second largest disease. My field began in 1991 onset, susceptible varieties green banana, handsome, red star, new red star, the first red, red top, New York and other marshals series; Jin Shuai, Guoguang followed. First, the incidence characteristics: Infection fast, acute onset, and cause a lot of leaves. Early rainfall, high temperature and rainy incidence is heavy, otherwise light. Especially at the end of April - May