二代棉铃虫发生程度与气象因素的灰色关联优势分析

采用灰色关联优势分析方法对辽宁省喀左县二代棉铃虫发生程度与气候因子间关系进行了分析,得出:6月下旬干燥度、7月上旬平均气温、6月中旬平均气温为影响发生程度的主要因子,7月中旬干燥度对二代棉铃虫发生程度的关联度最小。因此,夏季干旱少雨和气温偏高是棉铃虫大发生的重要条件。

The Gray Connected Advantage Analysis of the Second Generation Heliothis armigera Occurrence Degrees and the Weather Factors

The relationship between the second generation Helicoverpa armigera(Hbner) occurrence degrees and the climate factors was analyzed in Kazuo county, Liaoning Province. The results showed that the drought degree of the last-ten days in June, the average air temperature of the first-ten days in July and the average air temperature of the second-ten days in June were the main factors which affected the occurrence degrees of the second generation Heliothis armigera. And that the factor relatively poor correlated to it was the drought of the second-ten days in July. So the drought and higher air temperature in summer was the important conditions of the Heliothis armigera great occurrence.