南瓜果实蔓枯病病原菌鉴定  

Identification of pathogenic bacteria of pumpkin fruit vine blight

作　　者：张子玉 东保柱 孟焕文[1] 赵媛 苗建军 包立岚 周洪友[1] ZZHHAANG Ziyu;DONG Baozhu;MENG Huanwen;ZHAO yuan;MIAO Jianjun;BAO Lilan;ZHOU Hongyou(College of Horticulture and Plant Protection,Inner Mongolia Agricultural University,Hohhot O1oo00,China;Wuyuan County Meteorological Bureau,Bayannur 015100,China;Agricultural Technology Extension Center,Yjinholuo Banner,Erdos 017200,China;Agricultural Technology Extension Center,Korqin District,Tongliao 028000,China)

机构地区：[1]内蒙古农业大学园艺与植物保护学院,呼和浩特010000 [2]五原县气象局,巴彦淖尔015100 [3]鄂尔多斯市伊金霍洛旗农业技术推广中心,鄂尔多斯017200 [4]通辽市科尔沁区农业技术推广中心,通辽028000

出　　处：《植物病理学报》2024年第4期848-851,共4页Acta Phytopathologica Sinica

基　　金：巴彦淖尔市设施瓜类白粉病发生规律与绿色综合防控技术集成及示范推广(K202103);设施果蔬有害生物绿色防控关键技术研发与示范推广(2022YFXZ0011)。

摘　　要：南瓜(Cucurbita moschata Duch)是我国一种重要的经济作物,是集食用、药用为一体的瓜类蔬菜,用作鲜食或加工。由于南瓜营养价值高、耐贮运、产量高、收益好等优点,南瓜的种植面积也在逐年增加。2023年3月作者发现河北地区南瓜地内南瓜果实蔓枯病发生严重,发病率超过60%,发病部位多集中于果实靠地面的部位,初期表现为水渍状小点,后期果实表面干裂,病斑逐渐变大形成龟裂的凹陷斑并有胶状物溢出,严重时会引起果实腐烂(图1),造成严重的经济损失。Gummy stem blight,usually seen on the stems,leaves and fruits,is one of the most serious threats to production of pumpkin(Cucurbita moschata Duch.)in Hebei with reduction of the quality and heavy losses in yield.The pathogenic organisms of the disease were still obscure because several fungal species with most similar morphology were reported to be the causative agents.A fungal pathogen NG2023021301-4 was isolated from the diseased tissue and purified by single-spore isolation.According to morphological characteristics and combinatory phylogenetic analysis of ITS region,TUB gene sequences,the pathogen was identified as Stagonosporopsis caricae.To our knowledge,this is the first report of S.caricae causing verticillium wilt of pumpkin fruits.

关 键 词：蔓枯病 果实表面 病原菌鉴定 瓜类蔬菜 凹陷斑 发病部位 河北地区 果实腐烂 

分 类 号：S432.44[农业科学—植物病理学]