【摘要】 采用通径分析法研究了影响落叶松毛虫(Dendrolimus spp.)虫口密度的主要气象因子以及各因子之间的关系。各气象因子对落叶松毛虫虫口密度的直接作用依次为2月极端低温(x69)、上年1月平均湿度(x2)、1月降水量(x65)、3月平均湿度(x72)、4月降水量(x80)、上年12月极端低温(x59)、7月降水量(x95)。更多还原

【Abstract】 The main meteorological factors impacting population density of Dendrolimus superans and their relationship were studied by path analysis.The order of direct effect of meteorological factors on population density of Dendrolimus superans was as follows,the lowest temperature of February(x69),average humidity of January in the last year(x2),precipitation of January(x65),average humidity of March(x72),precipitation of April(x80),extreme temperature of December in the last year(x59) and precipitation of July(x95).更多还原