杰克贝尔氏粉蚧(Pseudococcus jackbeardsleyi Gimpel&Miller)为重要的水果、林木害虫,极易随进境水果进行传播,是我国未发生分布的具有重要检疫意义的粉蚧。为确定阻止其繁殖的不育剂量,促进辐照技术在检疫处理中的应用,利用60Co-γ射线对各龄期若虫、初期雌虫和成熟雌虫(虫龄大于5 d)进行辐照处理,辐照剂量为50~200Gy。在75、100、125Gy剂量下比较发育和繁殖的影响,结果表明,各虫态对辐照的耐受性顺序为1龄若虫<2龄若虫<3龄若虫<初期雌虫<成熟雌虫,100%阻止其F1代卵孵化的最低吸收剂量分别为75、75、100、100和125Gy以上。解剖雌虫发现,成熟雌虫的大部分卵(81.7±22.2%)在辐照前已产在虫体外的卵袋中,200Gy虽然不能100%阻止其卵孵化,但125Gy即可导致其孵化的1龄若虫100%死亡。应用机率值分析方法预测检疫处理的最低剂量,推算出阻止成熟雌虫繁殖F1代2龄若虫的最低吸收剂量(ED99.9968)为133.7Gy(95%置信区间为117.2~168.0Gy),推荐采用135Gy作为杰克贝尔氏粉蚧检疫辐照处理的最低吸收剂量。 Pseudococcus jackbeardsleyi Gimpel & Miller, an important fruit and tree pest, can easily spread with the incoming fruits. It is an important quarantine mealybug that has not been distributed in our country. In order to determine the dose of sterile to prevent its propagation and to promote the application of irradiation technology in quarantine treatment, the irradiation of the nymphs, female and adult female of each instar (insect age> 5 d) were irradiated by 60Co-γ ray , Radiation dose of 50 ~ 200Gy. The results showed that the order of tolerance to irradiation of the first instar nymphs was the first instar nymphs