柳蓝叶甲发育起点温度与有效积温的研究

在实验室条件下，对柳蓝叶甲的发育历期、发育起点温度和有效积温进行了研究.结果表明，随着温度的升高，发育历期缩短；柳蓝叶甲的卵、幼虫、蛹和产卵前期的发育起点温度分别为11.99、10.33、11.26、11.38℃，有效积温分别为43.04、132.86、38.74、74.95 d·℃；整个世代的发育起点温度为10.11℃，有效积温为317.87 d·℃；柳蓝叶甲在南京市年发生代数的预测值为8.36～8.91代. 

Threshold and effective accumulative temperature for the development of Plagiodera versicolora

The developmental duration, developmental threshold and effective accumulative temperature of Plagiodera versicolora, an important insect pest of Salicaceae plants, were studied in the laboratory. The results show that under four constant temperatures ranging from 15 to 35℃, the durations of various stages of Plagiodera versicolora were shortened with an increase in temperature. Based onthe results at constant temperatures, the threshold temperatures of egg, larvae, pupae, pre oviposition and a generation were estimated to be 11.99, 10.33, 11.26, 11.38 and 10.11℃ respectively. The effective accumulative temperatures were 43.04, 132.86, 38.74, 74.95 and 317.87 d·℃. Based on the investigation of its annual life history, it is concluded that the occurrence of Plagiodera versicolora was 8.36~8.91 generations annually in Nanjing, capital of south eastern China’s Jiangsu Province.