西花蓟马在不同花生品种间的实验种群生命表

Life tables of laboratory population of Frankliniella occidentalis on different peanut varieties

自西花蓟马(Frankliniella occidentalis Pergande)传入我国后,对花生生产已造成严重危害。为探讨西花蓟马在花生上的发生及危害规律,以11-107和11-4两个花生品种作为试验寄主,组建了25℃下西花蓟马在两个花生品种上的生命表。在两个花生品种上,西花蓟马的繁殖力及其他生命表参数差异显著,但是羽化前发育历期差异并不显著。西花蓟马在11-107和11-4品种上的雌虫寿命分别为16.50 d和13.50 d;产卵前期分别为1.71 d和1.36 d,产卵期分别为8.00 d和5.18 d。西花蓟马在11-107品种上每雌产卵量为18.79粒,显著多于11-4品种的9.67粒;11-107和11-4品种西花蓟马的净生殖率R0分别为5.26和2.32,内禀增长率rm分别为0.11872和0.0612。相对来说,11-107品种更有利于西花蓟马的发育和繁殖,11-4品种对西花蓟马的抗性高于11-107品种,因此11-4品种可作为抗虫育种的备选品种。

After western flower thrips （Frankliniella occidentalis Pergande）was found in China, the serious harm has been paid attention. To evaluate the harm resulted from western flower thrips on peanut, the life table of western flower thrips （eared on two peanut varieties was established by the software of ＂Age-stage, two-sex life table analysis＂. The results indicated that fecundity and life table parameters of western flower thrips were significantly different, however the pre-adult growth rate was not significant. The female adult＇ s life span of western flower thrips, pre-oviposition and oviposition on 11-107 （16.50, 1.71 and 8.00 d）were significantly longer than those on 11-104 （13.50, 1.36 and 5.18 d）. Oviposition amount per female of western flower thrips on 11-107 （18.79） was significantly more than that on 11-4 （9.67）. Net reproduction rates fRo） of 11-107 and 11-4 were 5.26 and 2.32 respectively, innate capacity of increase rates （rm） were 0.11872 and 0.0612, separately. By comparison, 11-107 was more suitable than 11-4 for the population growth of western flower thrips. In other words, resistance of 11-4 to western flower thrips was stronger than that of 11-107.