种薯药剂处理防治大田马铃薯晚疫病试验  

Field Efficacy Trials of Seed Tuber Treatment with Fungicides for the Control of Potato Late Blight

作　　者：马丽杰[1] 杨海萍[1] 马云芳[1] 王玲 朱玉斌 刘万喜 单卫星[1,4] 权军利[1,4] 

机构地区：[1]西北农林科技大学植物保护学院,陕西杨凌712100 [2]宁夏回族自治区固原市原州区农技推广服务中心,宁夏固原756000 [3]西安市临潼区农技推广服务中心,西安710003 [4]旱区作物逆境生物学国家重点实验室,陕西杨凌712100

出　　处：《西北农业学报》2012年第1期165-169,共5页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家现代农业产业技术体系项目(CARS-10);公益性行业(农业)科研专项(3-20);国家科技支撑计划(2009BADC5B04)

摘　　要：对利用药剂处理马铃薯种薯的方法进行研究,比较3种杀菌剂在2种含量水平上防治马铃薯晚疫病的效果,以期确立种薯处理防治马铃薯晚疫病应用技术,评估其生产推广价值。用商业化广泛使用的克露、安克以及银法利3种药剂和2个含量分别处理种薯,从马铃薯生长后期植株的发病率、发病部位以及发病程度等方面,系统分析不同药剂浸种处理对马铃薯晚疫病的防控效果。结果表明,50%安克WP 350倍液的种薯处理,植株发病率最低,叶片发病数最少,发病级数最低,防治效果最好。可见,种薯处理作为马铃薯晚疫病防控环节中的一个重要措施,通过有效防控来自带菌种薯的初侵染及其初始菌源来控制病害的发生。The late blight of potato,caused by Phytophthora infestans,has been the most devastating disease of potato in the world.Its current control strategies highly depend on spraying application of fungicides.In this study,soaking treatment of potato seed tubers was employed to assess the field efficacy of three different,commonly used fungicides,including cymoxanil-mancozeb,dimethomorph,and propamocarb,at two different concentrations on the control of potato late blight,according to the percentage of diseased plants,position and severity of diseased tissues in the late potato growing season.The results showed that the soaking treatment of seed tubers with the 50% dimethomorph WP of 350 times dilution achieved the best efficiency against late blight in terms of lower percentage of diseased plants,fewer and light diseased leaf tissues.Seed tuber-soaking is a potentially important method in the development of integrated approaches to control potato late blight,by effectively controlling primary infections resulted from P.infestans infected and contaminated seed tubers.

关 键 词：马铃薯晚疫病 致病疫霉菌 浸种处理 化学防治 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治]