印度谷螟各虫态及性别对^(60)Co辐照的敏感性  

THE SENSITIVITIES OF DIFFERENT STAGES AND SEXES OF INDIAN MEAL MOTH TO ^(60)Co IRRADIATION

作　　者：杨长举[1] 杨志慧[1] 胡建芳[1] 邓望喜[1] 陈文胜 张宏宇[1] 

机构地区：[1]华中农业大学植物保护系,武汉430070

出　　处：《植物保护学报》1995年第2期139-144,共6页Journal of Plant Protection

基　　金：国家自然科学基金

摘　　要：1992—1993年用^(60)Co—γ射线3,3.5,4,5,7,15,30和60Krad剂量辐照印度谷螟老龄幼虫,1—2日龄、3—4日龄、5—7日龄蛹,1—3日龄成虫和F_1代3—4日龄卵。研究表明,各虫态对^(60)Co辐照敏感性的顺序依次为:老龄幼虫>蛹>成虫;1—2日龄蛹3—7龄蛹;雌虫>雄虫,用于直接防治,用7—10Krad辐照幼虫和蛹,用30Krad辐照成虫和卵就能达到较好的防治效果。用3—3.5Krad辐照老龄幼虫,F_1代不育率为20.7％—82.3％;用3.5—4Krad辐照1—2日龄蛹,F_1代不育率为35.9％—48％。并且用这些剂量辐照对印度谷螟各虫态生活能力及成虫交配能力影响较小。初步认为,3—4Krad剂量辐照老龄幼虫和1—2日龄蛹较适合于印度谷螟的遗传防治。In 1992 - 1993, 3, 3. 5, 4, 5, 7, 15, 30 and 60 Krad of 60Co-γ ray were irradiated on old larvae, 1 - 2, 3 - 4 and 5 - 7 days old pupae, 1 - 3 days old adults and 3 - 4 days old F1 eggs of Indian meal moth Plodia interpunctella Hubner. The results showed that the sensitivity order of different stages and sexes to 60Co-γ ray was old larva> pupa > adult; 1 - 2 days old pupa> 3 - 7 days old pupa; female> male. For direct radiation control, the dosages at 7 -10 Krad for larvae and pupae and 30 Krad for adults and eggs were good enough to keep this insect pest under control. After 3-3. 5 and 3. 5 - 4 Krad of dosages were irradiated on old larvae and 1 - 2 days old pupae, the sterilities of F1 attained to 20. 7% - 82. 3% and 35. 9% -48%, respectively. The effects of all these radiation dosages on the viabilities of all the stages and copulation ability of adult were negligible. It was suggested that the 3 - 4 Krad of 60Co radiation, old larva or 1 - 2 days old pupa are appropriate for genetic control of Indian meal moth.

关 键 词：印度谷螟 辐照 敏感性 钴60 

分 类 号：S379.5[农业科学—农产品加工]