论文部分内容阅读
在广东各地,不同柑桔类对本病的反应不同,在果上表现不同类型的斑点。枝、叶上的病斑与果上的相似。 在广东果园的落叶上,发现了本病原菌(Phoma citricarpa McAlp.)的子囊世代(Guignardia citricarpa Kiely)。19e5年在从化良新果园观察到,落叶上被囊器的成熟和子囊孢子的大量放射适值春雨时期,与柑桔开花幼果期相吻合。落叶上被囊器所产生的子囊孢子是本病主要初次接种体。
Across Guangdong, different citrus species respond differently to the disease and show different types of spots on the fruit. Branches, leaves on the lesion and fruit similar. On the leaves of a Guangdong orchard, the Guignardia citricarpa Kiely was discovered from the Phoma citricarpa McAlp. During the spring of 1956, a large number of radish-ripening astigmats and a large number of radiation-suitable spring rains on the deciduous leaves coincided with the flowering period of young oranges. The ascospores produced by deciduous vesicles are the primary primary inoculum of this disease.