Helicoverpa armigera Hübner (Lepidoptera: Nuctuidae) is a well-known pest in the world which has established itself all over Iran. The effects of different doses of gamma radiation in the range of 100 to 350 Gy on some biological parameters of H. armigera were evaluated. The mean percentage of pupal mortality increased with increasing doses when 8-day-old pupae were irradiated. The lifespan of male and female H. armigera irradiated in the pupal stage were significantly shortened. The number of eggs (fecundity) of the female moths was remarkably affected by irradiation in all crosses. The percentage of hatched eggs (fertility) reached 0 at 350 Gy in various reciprocal crosses, while this value was less than 4 % when normal males mated with irradiated females at 300 Gy. The mean percentage of hatched eggs laid by F1 female progeny markedly decreased when male parents were irradiated at 150 Gy and reached 0 at the dose of 200 Gy in both crosses (F1 males or F1 females mated with non-irradiated partners). The sex ratio of emerged adults of F1 progeny from irradiated male parents skewed to male with increasing doses and reached to 0.66 at 200 Gy.

Helicoverpa armigeraHübner（鳞翅目：核科）是世界上著名的害虫，已在整个伊朗建立了自己的地位。评估了100至350 Gy范围内不同剂量的γ射线辐射对棉铃虫某些生物学参数的影响。当辐照8天大的p时，mortality死亡率的平均百分数随剂量的增加而增加。男性和女性棉铃虫的寿命在up期辐照明显缩短。在所有杂交中，雌性飞蛾的卵数（繁殖力）都受到辐射的显着影响。在各种互作中，孵化卵的百分比（育性）在350 Gy时达到0，而在正常雄性与辐照雌性在300 Gy交配时，该值小于4％。当雄性父母在150 Gy辐照时，F1雌性子代产下的孵化卵的平均百分比显着降低，而在两个杂交中（F1雄性或F1雌性与未辐照的伴侣交配），以200 Gy的剂量达到0时。从辐照过的男性父母那里获得的F1后代成年成年人的性别比例随着剂量的增加而偏向男性，在200 Gy时达到0.66。