凉山州2012年马铃薯晚疫病偏重发生的气候特征

The Climate Characteristics of the Popular Occurrence of Potato Late Blight Epidemic,Liangshan Prefecture in 2012

本文从马铃薯晚疫病发生流行的气候特征方面,分析了2012年凉山州春马铃薯晚疫病生态环境存在背景下,马铃薯晚疫病偏重发生的天气气候特征为初夏阴雨连绵,天气温凉,多雨高湿。初步分析出晚疫病发生流行的规律：在马铃薯晚疫病主要发生流行期的5月中旬~7月上旬,若出现连阴雨天气4d或持续降雨日在3d以上、日均空气相对湿度超过75%连续4~5d后,晚疫病将发生流行。该结论可作为凉山州春马铃薯晚疫病防治的预警指标,为晚疫病防治提供科学依据。

In this paper,we analyze the ecological environment of spring potato late blight from the aspects of the climate characteristics of potato late blight popular occurrence under the background of the existence of the spring potato late blight in Liangshan Prefecture in 2012.The climate characteristics include the warm,cool climate and the rainy,humid season in early summer.We find out the regulation of popular late blight and analyze it in this paper.The epidemic of potato late blight occurrence happens from the middle of May to early July.If the rainy weather reaches 4 days or continuous rainfall continues for more than 3 days,the daily average air relative humidity over 75% lasting 4 to 5 days,late blight epidemic will occur.The conclusion can be used as a warning indicator to prevent and control potato late blight in Liangshan Prefecture in spring,and it also can provide the scientific evidence for the prevention of late spring potato blight epidemic.