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根据当地气象因子与松针褐斑病发生和流行关系,即研究它们之间的相关性.试验结果证明:该病害的始发期、盛发期、末期和流行规律与气象因子关系密切.发病季节,在适温条件下,湿度的高低和雨量的多少是该病害流行的关键因素。一年中病害两次高峰也充分证实了两者之间的相关性.当气温达20～25℃,相对湿度80%以上,降雨量适中或持续时间较长,该病害可由发病中心株迅速蔓延扩展达到高峰。因此在大面积松林中,褐斑病的预测预报应以病原为主,当地气象预报为依据,综合分析该病发生的动态,就能及时准确地做好当年该病预测预报,为防治做好准备工作。
According to the occurrence and epidemic relationship between local meteorological factors and pine needle brown spot, the correlation between them was studied.The results showed that the onset, the flourishing period, the end of epidemic and the epidemic law of the disease were closely related with the meteorological factors. , In the temperature conditions, the level of humidity and the amount of rainfall is the key factor in the epidemic. The peak of disease twice a year also fully confirmed the correlation between the two.When the temperature reached 20 ~ 25 ℃, relative humidity above 80%, moderate rainfall or longer duration, the disease can be rapidly spread from the center of the strain Expansion reaches its peak. Therefore, in a large area of pine forests, the forecast and prediction of brown spot should be based on the pathogen, local weather forecast, comprehensive analysis of the occurrence of the disease, we can promptly and accurately do a good job in forecasting the disease in time for the prevention and treatment do a good job Ready to work.