马铃薯粉痂菌诱饵植物筛选及环境对病害发生的影响

通过筛选获得土壤中马铃薯粉痂菌的诱饵植物，明确不同地区土样的含菌量以及马铃薯栽培品种对土壤含菌量的影响；同时，研究温度和土壤含水量对马铃薯粉痂病发病情况的影响。采用带菌土壤诱导和带菌薯块诱导两种活体诱导的方法进行马铃薯粉痂菌的诱导；在温室条件下设计不同的处理来研究温度和土壤含水量对马铃薯粉痂病发病的影响。筛选得到诱饵植物为番茄品种‘3-375’，不同地区和种植不同马铃薯品种的土壤中粉痂菌的含量存在差异。温度和土壤含水量对粉痂病发病情况有一定影响。土壤中存在马铃薯粉痂菌，该病原菌可以通过土壤和种薯传播；温度和土壤含水量等环境因素对该病害的发生有影响。

Screening for Bait-plant of Spongospora subterranea and Impact of Environments on Potato Powdery Scab Disease Occurrence

The aim was to screen bait-plants of Spongospora subterranea in soil, understand the pathogen content in different areas and the effect of potato cultivars on soil pathogen content. At the same time, the influence of temperature and soil water content was studied on the occurrence of powdery scab. Two methods, contaminated soil and infected tuber, were used for screening bait-plant of Spongospora subterranean. Different treatments under greenhouse were designed to study the impact of temperature and soil water content on the incidence of powdery scab. Tomato variety ＆#39;3-375＆#39; was identified as bait-plant, and the content of pathogen was found to be different in different regions and cultivars. Temperature and soil water content had a certain influence on the incidence of powdery scab. Spongospora subterranea was found in soil, which can spread through the soil and diseased seed tuber. Temperature and soil water content can affect the occurrence of the disease.