Life table of the laboratory population of Hypera postica (Gyllenhal) at different temperatures

Life tables of laboratory population of Hypera postica were constructed at 18, 22, 26 and 30[degree]C, respectively. Results show that development increase as temperature increases from 18[degree]C to 30[degree]C, and meet logistic models. The developmental temperature threshold for egg, larva, prepupa, pupa and preoviposition stages of adults is 8. 82,10. 47, 8. 60, 11. 91, 9. 53[degree]C, respectively. The effective accumulated temperature for egg, larva, prepupa, pupa and preoviposition stages of adults is 99. 38, 143. 80, 48. 63, 55. 71, 140. 15[degree]C per day, respectively. The effective accumulated temperature of the entire generation is 480. 96[degree]C per day. Survival curves followed the 'Price A' pattern for these studies. Both generation survival rates (47. 6%) and number of nymphs produced by one female (847. 7 eggs) reached the highest at 26[degree]C. Either generation survival rate (S) or population trend index (I) may be described as a function of temperature (t) in parabola curves, The optimal temperature range for growth and development of Hypera postica was between 25 and 27[degree]C.