【摘要】 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。更多还原

【Abstract】 The reciprocal relations between climatic conditions and the occurence of needle brown in pine was studied.The results showed that the growth and decline of the disease were closely correlated to climatic factors.In the seasons when needle brown in pine occur- red,the key factors that caused the epidemic of the disease were the humidity and rainfall. When the air temperature reached 20-25℃,the relative humidity was over 80%,and the rainfall was medial or long-perioded the disease would spread rapidly from the centre to surrounding places and reach its peak.Therefore if only the occurence trends of the disease were analysed comprehensively,mainly based on the pathogen and native climatic condi- tions,the prediction of the disease in the same year would be accurate and the control of the disease could be prepared in time.更多还原