2022年武汉露地黄瓜霜霉病发生动态与气象因子关系分析

Analysis of Relationship between Incidence Dynamics of Field Cucumbers Downy Mildew Disease and Meteorological Factors in Wuhan Area in 2022

为探明露地黄瓜霜霉病发生发展与气象因子的关系,2022年在武汉地区采用分期播种露地种植黄瓜的方式,定期调查黄瓜霜霉病发病情况,分析了2022年黄瓜霜霉病发生动态变化规律,并结合前期气象因子,探讨了霜霉病病情指数与气象环境因子的关系。结果表明,2022年5月上旬气温偏低,不利于黄瓜霜霉病蔓延,5月下旬气温升高且湿度大,黄瓜霜霉病蔓延速度加快,6月上中旬温度高,光照充足,黄瓜霜霉病蔓延速度减缓。综上,认为气温是黄瓜霜霉病始发及蔓延速度的关键因子,湿度、降雨日数与霜霉病蔓延速率也密切相关。

In order to explore the relationship between the occurrence and development of downy mildew in field cucumbers and meteorological factors,cucumber was planted by interval sowing in the open field in Wuhan area in 2022.The incidence of downy mildew was regularly investigated,and the dynamic changes of cucumbers downy mildew in 2022 were analyzed.Combined with the previous meteorological factors,the relationship between the disease index of downy mildew and meteorological environmental factors was discussed.The results showed that the low temperature in early May was not conducive to the spread of cucumber downy mildew.In late May,the temperature increased and the humidity was high,leading to an accelerated spread of downy mildew.In early and middle June,with high temperatures and sufficient sunlight,the spread of cucumber downy mildew slowed down.In summary,it is considered that temperature is a key factor for the initiation and spread rate of cucumber downy mildew,and humidity and rain days are also closely related to the spread rate of downy mildew.