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2008~2009年对福建省福州市和长乐市两个冬种马铃薯晚疫病田间观测点进行了系统调查,对马铃薯晚疫病发病因素和田间病害流行动态进行了分析,并采用菌丝生长抑制法和田间防治效果对6种常用防治疫病的杀菌剂进行了评估。研究结果表明,马铃薯晚疫病发生、流行的主要时期在2月中旬至4月下旬,初始病情、日平均温度和日平均相对湿度是影响马铃薯晚疫病发生流行的重要因素,若日平均温度18~23℃,且相对湿度超过85%,一般在3~7 d后有晚疫病发生、流行,烯酰吗啉、氟吗啉、氟吗啉.锰锌、银法利和克露对马铃薯晚疫病防治效果显著,防治效果达80%以上。
2008-2009 years in Fuzhou City, Fujian Province and Changle City, two winter potato late blight field observation points were systematically investigated the incidence of potato late blight disease and field epidemic dynamics were analyzed and the use of mycelial growth inhibition and Field control efficacy of the six commonly used to control the fungicide blight were evaluated. The results showed that the occurrence and prevalence of late blight of potato was from mid February to the end of April. The initial condition, daily average temperature and daily average relative humidity were the important factors influencing the occurrence of late blight of potato. If the daily average temperature was 18 ~ 23 ℃, and the relative humidity is over 85%, and there is a late blight epidemic after 3 ~ 7 days. The epidemic, domperidone, flumorph, flumorph, Mn-Zn, The effect is remarkable, the control effect reaches more than 80%.