辐照对青杨虎天牛幼虫和蛹发育的研究初报

EFFECT OF 9MeV X-RAYS IRRADIATION ON DEVELOPMENT OF Xylotrechus rusticus (Coleoptera:Cerambycidae)

用9MeV高能X射线辐照处理青杨虎天牛的老熟幼虫和蛹,测定其化蛹率、羽化率并观察蛹、成虫及卵的发育。结果表明:100%阻止老熟幼虫化蛹和羽化的最低吸收剂量分别为60Gy和50Gy;应用机率值分析,推算出辐照导致幼虫死亡率达到99.9968%的最低吸收剂量为72.3Gy,95%置信区间为64.4～89.1Gy;2～3日龄的蛹经100Gy辐照后未能完全死亡,但80Gy辐照后羽化的成虫不育。

Mature larvae and pupae of grey tiger longihorn beetle（Xylotrechus rusticus Pinnaens） were irradiated by 9MeV X-rays.Pupation rate,emergence rate were measured and the development of pupae,adults and eggs were also observed.The results showed that there were no adults and pupae developed while the mature larvae were irradiated at the dose of 50Gy and 60Gy,respectively.The result of probit analysis indicated that the estimated dose for 99.9968% mortality of mature larvae was 72.3Gy and its 95% confidence interval was 64.4 ～ 89.1Gy.2 ～ 3 day pupae did not totally dead after irradiated at the dose of 100Gy,while its sterile dose was less than 80Gy.