北京地区剑叶金鸡菊白粉病病原菌鉴定

Identification of the pathogen Podosphaera fusca causing powdery mildew on Coreopsis lanceolata in Beijing

剑叶金鸡菊(Coreopsis lanceolata L.),原产于北美洲,多年生宿根草本植物,常作为绿化植物,广泛种植于我国各地的公园和庭院,具有观赏价值;种植在陡坡上,还具有稳固水土的作用[1]。金鸡菊全草可入药,具有清热、解毒等功效[2],其花朵还能够提取色素用于食品加工行业[3]。

Powdery mildew is a common disease on Coreopsis lanceolata,which affects the growth and deve-lopment of the plant and reduces its ornamental value.From 2022 to 2023,powdery mildew occurred seriously on Coreopsis lanceolate in Beijing.In this study,typical morphological characteristics of the pathogenic isolates were analyzed,and a phylogenetic tree was constructed based on the ITS sequence.The results showed that the isolates were identified as Podospaera fusca.This is the first report of Coreopsis lanceolata powdery mildew in Beijing,which will contribute to the control of powdery mildew on Coreopsis lanceolata.