不同的茶尺蠖地理种群增长差异性研究

On Geographical Differences of Population Increase of Ectropis Obliqua (Prout) in Different Geographical Zones

针对来源于6个省份的茶尺蠖种群发育和繁殖情况,研究不同茶尺蠖地理种群增长的差异性.结果表明:不同地理种群茶尺蠖的卵和幼虫发育历期具有明显的差异性,成虫寿命和产卵量亦存在着一定的差异性,而蛹的发育历期和幼虫存活率差异不明显.种群增长指数显示,在各种群中,以武汉种群增长指数最大,繁殖一代后种群数量约增加123倍,信阳和长沙种群增长指数最小约为80,而杭州、南昌、福州种群增长指数居中,介于80～123之间.

According to the development and reproduction situation of Ectropis obliqua larvae and its adult reproduction from six provinces, studies on the differences of population increase of different geographic populations of Ectropis obliqua from different geographic population zones have been conducted. The re- sults show that the development duration of eggs and larvae of Ectropis obliqua eggs and larvae in different geographic populations are of significant difference, and the fecundity and longevity of adult Ectropis obliqua also has differences. However, the differences of the pupal duration and survival rate of larva are not obvious. The fecundity and longevity of the different geographic populations of adult Ectropis obliqua has differences. The population increase index in all geographic populations. Wuhan＇s is the largest, which number of Ectropis obliqua will increase about 123 times after one generation cycle. The population in- crease indexes of Xinyang and Changsha are about 80, which is the least. The population increase indexes of Hangzhou,Nanchang and Fuzhou are between 80 and 123.