Longevity and Reproduction of Codling Moths Irradiated with Cobalt-60 or Cesium-1371

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Abstract
Adult Laspeyresia pomonella (L.) were treated with Cobalt-50 (Yakima, Washington) and Cesium-137 (Vincennes, Indiana) at levels of 10, 15, 25, and 40 krad and evaluated by 5 criteria, male longevity, female longevity, mating, oviposition, and egg hatch. When a sterilizing dose of 25 krad was given to males only, the effects of cobalt on mating and egg hatch were significantly different from the effects of cesium; however, at a dose of 40 had, only the frequency of mating on the basis of the 5 criteria was significantly different. The mating Combinations (treated × untreated insects) and the doses significantly affected the moths compared with the untreated controls, regardless of source. Also, though some of the differences in the responses were real between the 2 sources and locations, the trends were similar, and both types of treatments effectively sterilized the adult codling moth.

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