应用恒温条件下直线回归法，对湿地松粉蚧发育起点温度与有效积温进行研究，结果表明：粉蚧完成１代的发育起点温度为７．８±１．０℃，最适发育温度为２４～２５℃，有效积温为１０４２．９±８８．４日度；粉蚧向北扩散，在华南地区为年发生４代区，在长江以南地区为年发生３代区，在黄河以南地区为年发生２代区；粉蚧的最适生境在湖南省、江西省中南端区域 The linear regression method was used to study the onset and effective accumulated temperature of Iphiodes koningi. The results showed that the developmental starting temperature of mealybugs was 7.8 ± 1.0 ℃ and the optimum temperature was 24 ~ 25 ℃, the effective accumulated temperature is 1042.9 ± 88.4 days. The mealybugs spread northward and occur in the fourth generation of the area in southern China, and the third generation in the south of the Yangtze River. In the area south of the Yellow River, 2 generation area occurs annually; mealybugs optimum habitat in Hunan Province, Jiangxi Province, the southern tip of the region