摘要
根据2007年在凉山州冕宁的城厢（海拔1823m）、拖乌（海拔2144m）、昭觉的庆恒（海拔1659m）、上游（海拔2571m）4个点各5期的马铃薯晚疫病发生程度的地理分期播种试验资料，研究凉山州马铃薯晚疫病发生、流行的气象成因和动态特征。结果表明，马铃薯晚疫病发生、流行的主要时期在5月下旬-7月初；5月中旬-6月上旬，若出现连续降雨日在5d以上、并且相对湿度连续6d以上超过75％的情况，一般在5～10d后有可能发生晚疫病。因此，建议以此作为马铃薯晚疫病防治的预警指标，以便在预警指标出现后的5d之内积极组织防治，以提高防治效果。
Based on the data of the experiments on seedtime in four sites, namely in Chengxiang with altitude at 1823m, Tuowu with altitude at 2144m, Qingheng with altitude at 1659m and Shangyou with altitude at 2574m, in Mianning County of Liangshan Prefecture of Sichuan Province, and data of the occurrence of the potato late blight, the meteorological causes and the dynamic characteristics of occurrence and epidemiology for potato late blight were analyzed. The results showed that the main period of occurrence and epidemic of potato late blight was from the last ten days of May to beginning of July. During the first ten days of May and the first ten days of June, the potato late blight would occur in five to ten days if the meteorological factors, such as the sequential rainy days lasted more than five days and the relative humidity was higher than 75% in successive six days, which was suggested to be the warning indexes for the occurrence and epidemic of potato late blight. The prevention measures should be taken in five days when these warning indexes were fulfilled.
出处
《中国农业气象》
CSCD
2008年第4期481-484,490,共5页
Chinese Journal of Agrometeorology
基金
中国气象局气象新技术推广项目(CMATG2007M25)
关键词
气象因素
马铃薯晚疫病
发生流行
凉山州
Meteorological factors
Potato late blight
Occurrence and epidemic
Liangshan Prefecture
