01742nas a2200181   4500008004100000020001400041245010000055210006900155260001100224300001200235490000700247520112700254653001901381100001401400700001301414700001801427856011501445       2010                        eng d  a1007-043500aLife table of the laboratory population of Hypera postica (Gyllenhal) at different temperatures0 aLife table of the laboratory population of Hypera postica Gyllen  cSep 18  a726-7300 v183 aLife 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.10aHypera postica1 aZhang, Na1 aZhao, Li1 aChai, Yan-jun  uhttps://weevil.myspecies.info/life-table-laboratory-population-hypera-postica-gyllenhal-different-temperatures01849nas a2200181   4500008004100000020001400041245008500055210006900140260000800209300001200217490000700229520126200236653001901498100001401517700001301531700001601544856010701560       2010                        eng d  a1001-433000aPrimary research on wing dimorphism of alfalfa weevil Hypera postica (Gyllenhal)0 aPrimary research on wing dimorphism of alfalfa weevil Hypera pos  cMay  a910-9140 v473 a( Objective ) To explore the effect of the factors such as heredity and environment on wing dimorphism of alfalfa weevil and then provide theoretic basis to forecast its occurrence . ( Method ) Larvae were reared until becoming pupae under conditions that included different parental combinations, temperatures, larva densities and host quality statistic analysis on wing dimorphism differentiation was conducted. ( Result) The results showed that: there are significant difference in wing morph differentiation of Ft progeny pupae obtained from different parental combinations, especially in the combination when both parents were normal [long dash] wing (N x N cross) vestigial [long dash] wing pupae of Ft progeny can be as high as 94.1% ; the effect of temperature and density were also significant : the differentitation ratio of normal [long dash] wing pupae increased and vestigial [long dash] wing pupae decreased with the increasing of temperature and density; quality of hosts brought significant difference, the ratio of normal [long dash] wing pupae in the treatment of alfalfa stem were obviously high than the treatment of alfalfa leaf . ( Conclusion ) Thus, the differentiation of wing morph of alfalfa weevil were controlled by many factors.10aHypera postica1 aZhang, Na1 aZhao, Li1 aZhang, Ting  uhttps://weevil.myspecies.info/primary-research-wing-dimorphism-alfalfa-weevil-hypera-postica-gyllenhal