影响甜菜黑腐丝囊霉的几种生态学和生物学因子(英)  

ECOLOGICAL AND BIOLOGICAL FACTORS AFFECTING APHANOMYCES COCHLIOIDES

作　　者：李敏权[1] 林淑洁[1] 徐秉良[1] 张自和[2] 

机构地区：[1]甘肃农业大学植保系,兰州730070 [2]甘肃草原生态研究所,兰州730020

出　　处：《应用与环境生物学报》2003年第2期183-185,共3页Chinese Journal of Applied and Environmental Biology

摘　　要：通过对河西灌区甜菜(Beta vulgaris L.)黑腐病(Sugar Beet Black Rot)为期3 a的研究,探讨了甜菜栽培品种与病害发病率及病原菌黑腐丝囊霉(Aphanomyces cochlioides)分离频率的关系以及3种环境因子即温度、pH值、不同天然培养基与甜菜黑腐丝囊霉的关系。结果表明:各栽培品种在田间的发病率与室内病原分离频率不同,其中工农2号田间发病率为1.3％,室内分离频率为93％,工农5号分别为1％和7.2％,宁甜301分别为2％和6.1％,工农2号具有更大的耐病性;甜菜黑腐丝囊霉的生长温度范围为5～30℃,最适温度为25～27℃,对高温敏感,33℃为其致死温度;甜菜黑腐丝囊霉可在pH 3.5～11范围内生长,最适pH为5～9.9;甜菜黑腐丝囊霉在PDA、玉米粉琼脂、甜菜汁、麦芽糖-胨、麦芽糖酵母汁及燕麦琼脂培养基上均可生长,其中在甜菜汁培养基上生长最好.Aphanomyces cochlioides was studied ecologically for 3 years in a field plot in the Hexi irrigation area in Gansu, China. The relationship between cultivars of sugar beet ( Beta vulgaris L. ) and black rot disease, three factors (temperature, pH and composition of medium) and A. cochlioides were investigated. The results showed that both disease incidence and pathogen i-solation rate of cultivars were different, such as disease incidence of Gongnong 2 was 1.3% in the field, isolation rate was 93% in laboratory, but those of Gongnong 5 were 1% and 7.2% , Ningtian 301 were 2% and 6. 1% , respectively. As for its growth temperature, the minimum was 5 ℃ , the optimum was 25 ~ 27 ℃ and the maximum was 30 ℃. A. cochliodes grew at a relatively wide pH range (3.5 - 11) with optimum pH of 5 -9. 9. It grew best on sugar beet juice medium. Fig 4, Tab 3 , Ref 11

关 键 词：甜菜 黑腐丝囊霉 生态学 生物学 黑腐病 温度 PH值 培养基 品种 发病率 病原分离频率 

分 类 号：S435.66[农业科学—农业昆虫与害虫防治]