【摘要】 利用贵州六盘水市农业科学研究院综合科研基地(平均海拔1 100 m),于2016—2017年开展秋种马铃薯气候试验。基于马铃薯晚疫病监测资料,结合2016—2017年的8月15日至12月31日逐日平均温度、最低温度、相对湿度、降水量等资料,对秋种马铃薯晚疫病发生、流行的气象因子和动态特征进行分析、研究。结果表明:马铃薯晚疫病发生、流行的主要时期为现蕾—开花期。在马铃薯现蕾—开花期,当连续3 d及以上日平均温度≤18℃,且相对湿度>75%时,3 d之后,当日平均温度>18℃、相对湿度>75%时,有利于晚疫病发生。建议以此气象条件作为秋种马铃薯晚疫病防御的预警指标,以便在预警指标出现后积极组织预防,以提高防治效果。更多还原

【Abstract】 The Climate Experiment of Potato planting in the autumn was carried out in 2016—2017 by using the comprehensive scientific research base of Agricultural Research Institute of Liupanshui in Guizhou Province(average altitude 1 100 m).Based on the monitoring data of potato late blight and the daily average temperature, minimum temperature, relative humidity, precipitation and other data from August 15 to December 31 in 2016—2017, the meteorological factors and dynamic characteristics of the occurrence and prevalence of Potato Late Blight in autumn were analyzed and studied. The results show that: The main period of occurrence and epidemic of potato late blight is bud stage to flowering stage. In the bud stage to flowering stage, when the daily average temperature is less than or equal to 18 ℃ and the relative humidity is more than 75%, after 3 days, when the daily average temperature is more than 18 ℃ and the relative humidity is more than 75%, it is beneficial to the occurrence of late blight. It is suggested that the meteorological conditions should be taken as early warning indexes of potato late blight prevention in autumn, so as to actively organize prevention after the early warning indexes appear, so as to improve the control effect.更多还原