论文部分内容阅读
小麦根腐病的流行强度受气象因子的影响很大,小麦扬花期旬平均气温10℃以上,相对湿度80％以上,病害流行起点值高。在小麦生育后期出现高温高湿的气候环境,当年根腐叶枯发生严重。小麦扬花期病情指数5％左右,当年病害流行强度1级;叶部病情指数20％左右,当年病害流行强度可达4级。据病害发生程度与小麦扬花期叶部病情以及与气象因子的相关研究结果,研制出两种予测根腐叶枯流行强度的方法,置信度90％以上,可用于指导根腐叶枯的药剂防治。
The prevalence of wheat root rot was strongly influenced by meteorological factors. The mean temperature at the flowering stage was above 10 ℃ and the relative humidity was above 80%. The starting point of the disease was high. In the late stage of wheat emergence of high temperature and humidity of the climatic environment, when the root rot rot serious. Wheat blooming disease index of about 5%, then the disease epidemic intensity of 1; leaf disease index of about 20%, when the disease epidemic intensity up to 4. According to the degree of disease occurrence and leaf flowering stage of wheat and the related research results with meteorological factors, two methods for predicting the epidemic intensity of root rot were developed. The confidence level is more than 90%, which can be used to guide the root rot of leaf rot Prevention and treatment.