Gamma radiation sensitivity of different stages of saw-toothed grain beetle Oryzaephilus surinamensis L. (Coleoptera: Silvanidae)
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Department of Entomology, Agricultural Facuty, Urmia University, Urmia-Iran
Department of Entomology, Agricultural and Natural Resources Faculty, Islamic Azad University, Branch of Mahabad, Mahabad-Iran
Agricultural, Medical and Industrial Research School, Karaj-Iran
Radiation Application Research School, Yazd-Iran
Hosseinzadeh Abbas
Department of Entomology, Agricultural Facuty, Urmia University, Urmia-Iran
Journal of Plant Protection Research 2010;50(3):250–255
The effect of gamma irradiation on different developmental stages of Oryzaephilus surinamensis L., was investigated. Results showed that a required dose to prevent larval emergence from irradiated 1–2-days-old eggs was 60 Gray (Gy), and 350 Gy was required to prevent adult emergence from 15-days-old larvae. Also the required dose of radiation to prevent adult emergence from irradiated 5-days-old pupa was 700 Gy. The dose of 200 Gy caused 100% mortality of irradiated adults 28 days after treatment. In addition, the effect of gamma rays was studied on the developmental stage period of each irradiated stage till adult emergence. The results revealed that there was a dose-dependent increase of the developmental periods. The growth index of adults was significantly decreased with increasing dose of radiation administered to eggs, larvae and pupae. It is recommended that doses between 600 and 700 Gy should be used to control population growth of O. surinamensis when targeting pupae and adults present in stored products.
The authors have declared that no conflict of interests exist.
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