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日本梨黑星病(Venturia nashicola Ta-naka et Yamamoto)是本市郊区日本梨的主要病害,在春季雨水偏多,气温偏高的年份,病害尤为猖獗。本来着重研究其发病规律和探索防治方法。
Venturia nashicola Ta-naka et Yamamoto is a major disease of Japanese pear in the suburbs of this Municipality. It is especially rampant in spring when rainfall is high and temperatures are high. Originally focused on the study of its incidence and explore prevention methods.