甘肃省定西市马铃薯晚疫病发生及品种抗性评价  

The occurrence of late blight in potatoes and varieties evaluation of disease-resistant in Dingxi City,Gansu Province

作　　者：杨小利[1] 杨成德[1] 陈秀蓉[1] 陈泰祥[1] 张俊莲[2] 

机构地区：[1]甘肃农业大学植物保护学院,甘肃兰州730070 [2]甘肃省作物遗传改良与种质创新重点实验室,甘肃兰州730070

出　　处：《草原与草坪》2016年第4期82-86,共5页Grassland and Turf

基　　金："十二五"国家科技支撑计划(2012BAD06B03);国家自然科学基金(31160122)资助

摘　　要：对定西市渭源县马铃薯晚疫病发生期主要气象因子与病害发生流行的关系进行了调查分析,并对7个主栽品种抗性进行了评价。结果表明:渭源县晚疫病8月初开始发生,下旬进入发病盛期,其病情指数与平均温、湿度综合因子之间存在显著的线性关系(P<0.05);青薯9号和庄薯3号单产分别为1 467.40、1 371.06kg/667m2,出苗率分别为91.90%、96.70%,病薯率分别为5.95%、5.16%,晚疫病情指数分别为44.56和33.92,表明主栽品种适合在当地推广种植。The research analyzed relationship between the major meteorological factors with the late blight of potatoes in Dingxi,and evaluated their resistances about different varieties to late blight at the same time.The results showed that the late blight of potatoes in Dingxi city was begun to appear at the beginning of August,and the full incidence period was in late August.The significant relation was observed between the disease index and temperature considering the humidity（P〈0.05）.Qingshu 9and Zhuangshu 3were suitable for local condition,the yield were 1 467.40 and 1 371.06kg/667m2,the rate of emergence were 91.90% and 96.70%,the incidence of disease were 5.95% and 5.16%,the disease index of late blight were 44.56 and 33.92 respectively.

关 键 词：马铃薯 晚疫病 抗性评价 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治]