论文部分内容阅读
今年八春以来,达县地区连续出现了少有的持续低温、春雪天气,导致了小麦雪腐病的发生和危害,致使一些早播的麦田不能抽穗,死穗比较严重。我们在达县的小树、麻柳、堡子、管村等区的一些乡、组的麦田调查,发生的死穗率在18.5％到25.3％,平均死穗率为18.8％。一些麦田成团成块地发生黄叶和剑叶干枯现象。小麦雪腐叶枯病在什么样的气候条件下发生?它危害小麦后的主要症状是什么?田间如何识别?发生后采用什么方法防治?根据个人初浅实践,作如下简要介绍。
Since the 8th spring of this year, there has been a series of rare continuous low temperature and snowy weather in Daxian area, which has led to the occurrence and harm of snow blight in wheat. As a result, some early-sown wheat fields can not be heading and the dead spike is more serious. In the wheat fields of some townships and groups in the small trees, Maliu, Baozi and Guancun areas in Daxian, the dead spikes ranged from 18.5% to 25.3% and the average dead spike rate was 18.8%. Some wheat fields into a block yellow leaves and dry leaves phenomenon. Wheat snow blight occurs under what climatic conditions? What harm it is the main symptom of wheat? How to identify the field? After what method is used to prevent? Based on personal practice, as follows briefly.