الحساسية الإشعاعية و استحداث العقم الجنسي لحفار ساق الذرة (Noctuidae : Lepidoptera)‎ Sesamia cretica Led. : -3 تشعيع العذاري

Abstract EN

Radiosensitivety and induced sexual sterility level was studied in the corn stem borer, Sesamia cretica Led.

1-3 and 8-10 days old pupae exposed to different doses of gamma rays.

The following biological parameters were recorded: pupal mortality, adult emergence, adult malformation adultiform, mating ability, longevity, fecundity and fertility.

Mating types were; normal female x normal male (control), treated female x normal male and normal female x treated male.

The results indicated that 8-10 days old pupae were more resistant to radiation that 1-3 days old pupae.

Irradiation of 1-3 days old pupae lead to significant increase in mortality rate and adult malformation, especially at high doses, whereas no such deleterious effects was observed on irradiated 8-10 days old pupae.

Complete sexual sterility was obtained in females or males emerging from 1-3 day old pupae irradiated with 40 or 50 Grays respectively.

Whereas, irradiation of 8-10 day old pupae with a higher dose of 150 or 400 Grays induced complete sexual sterility in the emerging females and males, respectively.

Key words: Radiosensitivety, Induced Sexual Sterility, Corn Stem Borer.