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为了了解泡桐丛枝病的发生、发展与各个因子间的关系,以便更有效的采取防治措施,几年来,我们在开展泡桐丛枝病综合防治技术推广的同时,对影响泡桐丛枝病的发病因素进行了调查。一、调查方法及内容1.方法 1982—1983年,采用踏查、随机抽样、建立标准地、固定标准木等方法,对省内泡桐主栽区的蒲城、武功、扶风、渭南、临潼、大荔、合阳等26个县市泡桐丛枝病的发生及危害情况进行了调查。调查样点
In order to understand the occurrence of Paulownia witches broom disease, and the development of the relationship between the various factors in order to take more effective prevention and control measures, in recent years, we carry out the comprehensive prevention and control of Paulownia broom disease technology promotion at the same time, the impact of Paulownia witches broom disease Factors were investigated. I. Methods and Contents of the Investigation 1. Methods During 1982-1983, using methods such as tread investigation, random sampling, establishment of standard and fixed standard wood, Dali, Heyang and other 26 counties and Paulownia witches broom disease occurrence and damage were investigated. Survey sample