Effects of electron beam irradiation on sterility of Comstock mealybug, Pseudococcus comstocki (Kuwana) (Homoptera: Pseudococcidae).

摘要

Twelve-day-old eggs and third-instar nymphs (including 77.5% preovipositional adult females) of Pseudococcus comstocki were irradiated with electron beams to determine their radiosensitivities. Survivors from 12-day-old eggs irradiated at 400 Gy orhigher died as 1st-instar nymphs. However, at 200 Gy, survivors developed into adult females slowly. Cross testing indicated that these females were sterilized. Third-instar larvae were sterilized at 200 Gy or higher, and yielded unviable eggs.