Abstract:

Cyrtorhinus lividipennis is a key predator of the major rice pest the brown planthopper （BPH）， Nilaparvata lugens. Biological control of BPH by C. lividipennis could be much more effective and feasible by improving the techniques of artificial breeding and field\|releasing. In this study， the successive effects of different temperatures （19℃， 23℃， 27℃and 31℃） on the growth， development and reproduction of C. lividipennis were determined over three generations in the laboratory. The results showed that the female nymph duration was significantly shortened and the number of offspring decreased as generations developed at 19℃， the female adult longevity was shortened and the number of offspring reduced at 31℃; However， no obvious change on nymphal survival rate， female nymphal duration， female fresh weight， adult longevity and fecundity was found at other tested temperatures. Our results indicated the development and reproduction of C. lividipennis could be suppressed at 19℃ and 31℃，which could provide a theoretical basis for artificial breeding and field\|releasing of C. lividipennis.

Key words: temperature, Cyrtorhinus lividipennis, growth and development, reproduction, successive effect