Studies On The Biology And Ecology Of Asecodes Hispinarum Bou(?)ek

It's significant to study the biology and ecology of A. hispinarum. The biology and ecology of A. hispinarum, the harmony of bio-control with chemic control, and the potential distribution of A. hispinarum in China was systematically studied in this article. The results are instructive to apply bio-control and integrated pest management to control the population of Brontispa longissma, the host of A. hispinarum. The results are briefly summarized as below.1. Under the laboratory condition of 24℃±2℃and RH 75%±10%, the mean developmental duration of egg, larve and pupa were 2.8 days, 6.7 days and 7.5 days, respectively; the longevity of adults without nutritional supplement was 2.5 days on average. Both the temperature and nutritional supplement affected the longevity of adults, and the mean longevity of female adults was longer than that of male adults. Fecundity was 43 on average and the peak of oviposition occurred within 12 hours after mating.2. The parasitic ability and development of A. hispinarum under temperatures, relative humidity and photoperiods were observed. The result showed that the temperature and humidity had significant influence to the development of A. hispinarum, but no significant influence to the parasitic ability of the wasp. The rate of adult emergence and the number of wasp offsprings per host reached highest at the range of 20℃～26℃, and the number of wasp offsprings per host was significantly higher than the others, when the relative humidity at the range of 60%～90%. The temperature and relative humidity had no effect on the female percentage. The development duration of A. hispinarum decreased with the increase of the temperature and humidity. The temperature threshold was 10.7℃, and the effective temperature was 261.29 degree-days. The photoperiod only had influence to the development duration, and it decreased with the increase of photoperiod. With the number of wasp offsprings per host as assessment...