Effect of Temperature on Experimental Population Dynamics of Typhlodro mus bambusae Ehara

The development,survivorship,fecundity and longevity of Typhlodromus bambusae Ehara fed on the spider mite of Schizotetranychus bambusae were observed at 16,20,24,28,and 32 ℃,respectively.The age-specific life tables of experimental population in T.bambusae were established.The relationship bet ween population dynamics and 5 constant temperatures was analyzed using Morris model and Weibull frequency distribution.The results indicated that the eggs lai d per female varied greatly from 31.26 at 24 ℃ to 9.2 at 32 ℃.The relationship between population trend index (I) and temperature (T) could be si mulated with equation:I=98.7747+9.6914T-0.2033T2.Theoretically,I had the highest value (16.74) at 23.83 ℃.Based on analysis,the mos t important factor affecting I was average eggs per female.Within temperature range of 16-32 ℃,The population survival curve belongs to type of Deevey Ⅰ.