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首次在国内应用通径分析方法,分析了影响浙江省瑞安市越冬代马尾松毛虫发生的综合因子中的关键因子、间接因子和各种因子间的关系。从直接通径系数中看出,前一年10月份日照数是关键因子,当其增加一个标准单位,致使松毛虫发生面积增加0.7969个标准单位。从间接通径系数看出,降雨日数每增加一个标准单位。虫害发生面积减少0.3842个标准单位。虫口密度与发生面积呈正相关。
For the first time in China, the path analysis method was applied to analyze the relationship between key factors, indirect factors and various factors affecting the overwintering population of Dendrolimus punctatus in Ruian City, Zhejiang Province. From the direct path coefficient shows that in October the previous year the number of sunshine is the key factor, when an increase of one standard unit, resulting in the area of pine caterpillars increased 0.7969 standard units. The indirect path coefficient shows that for each additional standard rainfall unit. Pest occurrence area reduced by 0.3842 standard units. Insect population density and the occurrence of a positive correlation.