茶毛虫的种群生命表

Life tables of tea caterpillar population

以“捕食”、“寄生”、“其它”作用因子组建茶毛虫自然种群生命表 ,并采用控制指数 (IPC)法分析各作用因子对茶毛虫种群系统的控制作用 .这 3种作用因子对第 1- 4代茶毛虫的 IPC分别为 4 .2 0 6 5、3.2 345、1.4 32 4 ;7.80 0 8、4 .4 6 2 7、3.2 152 ;6 .32 10、4 .70 19、3.6 2 35;3.94 57、3.7858、1.36 0 0 .天敌是影响茶毛虫自然种群的重要因子 ,控制作用“捕食”大于“寄生”.不同温度下实验种群试验结果表明 ,温度与茶毛虫的卵孵化率 ,幼虫、蛹、成虫产卵前期存活率 ,成虫产卵量呈二次曲线关系 .卵孵化率模型为 Y =- 2 95.5115+31.0 2 54X -0 .6 2 54X2 ,幼虫存活率模型为 Y =- 12 2 .36 0 1+18.390 0 X - 0 .4 0 6 0 X2 ,蛹存活率模型为 Y =- 12 6 .3515+14.86 34X - 0 .3114X2 ,成虫产卵前期存活率模型为 Y =- 94 .382 9+16 .5889X - 0 .380 9X2 ,成虫产卵量模型为 Y =- 593.4 2 88+6 6 .30 86 X - 1.3886 X2 .

The factors including predation, parasitism and others were used to develop life tables of the different generations of tea caterpillar ( Euproctis pseudoconspersa Strand) natural population, and the method of index of population control ( IPC ) was used to analyse the roles of different factors to control the natural population, IPC of these factors on the first till forth generations of tea caterpillar were 4.2065, 3.2345, 1.4324; 7.8008, 4.4627, 3.2125; 6.3210, 4.7019, 3.6235; 3.9457, 3.7858, 1.3600, respectively. Natural enemies were the major factors, and the role of predation was more significant than that of parasitism. Effects of temperature on tea caterpillar population investigated in laboratory showed that the correlations of temperature to egg hatching rate, the survival rates of larvae, pupae and adult preoviposition, and fecundity were quadratic curves, and their equations were Y=-295.5115+31.0254X-0.6254X 2 , Y=-122.3601+18.3900X-0.4060X 2 , Y=-126.3515+ 14.8634X -0.3114X 2 , Y=-94.3829+16.5889X-0.3809X 2 , Y=-593.4288+66.3086X-1.3886X 2 , respectively.