云南马铃薯晚疫病的流行及预警系统研究

Study on epidemiology and warning system of potato late blight in Yunnan

云南马铃薯晚疫病发生具有明显的区域特点.流行学与降水量和温度关系密切.云南晚疫病可分为晚疫病高发生区,该区包括昭通以及海拔2200 m以上的高寒山区.常发生区,包括滇中曲靖、昆明等海拔2000m左右的山区.轻发生区,包括迪庆等海拔3300 m左右的高原地区.应用CASTOR马铃薯晚疫病预测软件,筛选出Ullrich预测模型,能够较准确地预测预报云南马铃薯晚疫病的发生.配套采用Hobo H8 RH/T自动气象测量仪,建立了田间直接或远程的晚疫病预警系统.

The spread and damage degree of potato late blight(LB) caused by Phytophthora infestans have significant regional differences,as there are the diversities of climate factors in potato growing regions of Yunnan.The regions are classified into that the disease is found most early and spread easily in high risk region.This region is high and cool mountain area(sea level above 2200m),with heavy rain and fog,few sunshine.The raining season begins in May.There are 35 days with RH≥90% among the 77 days of plant gr...