麦类赤霉病是我地区大小麦上的流行性病害,发生严重时,常常造成减产。为了尽快控制其为害,我们对赤霉病的流行规律,预测预报,药剂防治等方面进行了试验研究。在嘉兴地区,麦类赤霉病的流行除了菌源外,在很大程度上决定于气候条件。大麦抽穗开花期间,稻桩带菌率在20%以上,空中子囊孢子数每天达50个以上,这是造成大麦上赤霉病流行的重要原因。大麦抽穗至灌浆初期遇有4天以上连续阴雨,是病害流行的主导因子。根据病害流行规律以及气象资料分析,我们初步提出以下中、短期预测预报方法: Wheat scab is a pandemic on wheat in large and small areas in my country. In severe cases, it often leads to reduced production. In order to control its damage as soon as possible, we conducted a pilot study on the prevalence, prediction and control of Fusarium head blight. In Jiaxing, the prevalence of wheat scab belongs to a large extent in addition to the bacterial source, and is largely determined by the climatic conditions. During the flowering and heading of barley, the rate of rice piles was more than 20% and the number of ascospores was more than 50 per day, which was the important reason for the epidemic of scab in barley. Barley heading to the early filling encountered more than 4 consecutive rainy days, is the dominant factor in the epidemic. According to the prevalence of disease and meteorological data analysis, we initially proposed the following medium and short-term forecasting and forecasting methods: