This paper deals with, after the infection of Rose Black Spot the rel-ation between its pigment, the content of amino acid and incidence of the disease.

• 本文报道月季感染黑斑病(Diplocarpom rosae wolf)后,其色素和氨基酸含量与发病率的关系。 月季感病后,健叶与病叶相互比较,病叶的色素、氨基酸比健叶下降,其中以天门冬氨酸、谷氨酸、脯氨酸下降为多。