Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4517417 | Journal of Stored Products Research | 2007 | 5 Pages |
Abstract
Mortality of UVC-irradiated larvae increased proportionally with increase in UVC dose, while, for each dose, mortality was inversely related to age of larvae at irradiation. Thus, at a UVC dose of 56.52Â JÂ cmâ2, larval mortality was 98.3%, 93.3% and 83.3% and adult emergence was 1.7%, 6.7% and 11.7% for 1-9, 10-18 and 19-27 day-old larvae, respectively. Similar effects were observed for UVC doses 150.72 and 226.08Â JÂ cmâ2 with an increase in the overall mortality of larvae and a decrease in adult emergence. Effect of irradiation of 0, 24 and 48Â h-old pupae with doses of UVC, was inversely related to age of pupae at irradiation. Thus, at 56.52Â JÂ cmâ2, mortality as pupae was 91.7%, 71.7% and 73.3% and adult emergence was 0%, 3.3% and 1.7% for 0, 24 and 48Â h-old pupae, respectively. Premature emergence of deformed adultoids was 25% when 24 and 48Â h-old pupae were irradiated with the above dose. At a dose of 225.08 52Â JÂ cmâ2 there was no adult emergence. Death as pupae was 98.3%, 96.7% and 78.3% and premature emergence was 1.7%, 3.3%, and 21.7% for pupae irradiated at 0, 24 and 48Â h-old, respectively.
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Authors
Iyad Ghanem, Motassim Shamma,