X-Ray-Based Irradiation of Larvae and Pupae of the Navel Orangeworm (Lepidoptera: Pyralidae)
| Autor: | Pei-Shih Liang, Joseph Gomez, Natsuko Toyofuku, Inna Ovchinnikova, Robert Hnasko, Wai S. Gee, Douglas M. Light, Eric Jackson, Ronald P. Haff, Noreen Mahoney |
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| Rok vydání: | 2020 |
| Předmět: |
Male
0106 biological sciences animal structures Sterility Offspring Moths Amyelois transitella 01 natural sciences 03 medical and health sciences Sterile insect technique Animal science Animals 030304 developmental biology Pyralidae 0303 health sciences Larva Ecology biology X-Rays fungi Pupa General Medicine Sterilization (microbiology) biology.organism_classification 010602 entomology Gamma Rays Insect Science |
| Zdroj: | Journal of Economic Entomology. 113:1685-1693 |
| ISSN: | 1938-291X 0022-0493 |
| Popis: | The suitability of adult male the navel orangeworm, Amyelois transitella (Walker) for Sterile Insect Technique (SIT) has been reported for both high energy gamma (>1 MeV) and low energy x-ray (90 keV) sterilization. However, research regarding sterilization of NOW larvae and pupae by gamma irradiation indicated nonsuitability due to high mortality. Here, NOW larvae and pupae were irradiated to doses up to 50 Gy with 90 keV x-rays, then paired with nonirradiated colony mates. Sterility of surviving insects was determined by the presence or absence of hatched neonates. While presence of offspring does not guarantee viability, the absence does guarantee sterility (as is appropriate for SIT) and was thus the measure used here. Early stage larvae experienced 77% mortality at a dose of 30 Gy, versus 20% for nonirradiated control. At 40 Gy, mortality reached 98%. Of surviving early stage larvae at 30 Gy, 29% of moth pairs produced offspring. For late stage larvae, no offspring were produced at 40 Gy, but mortality was 73%. For pupae, mortality reached 53% at 30 Gy with 13% still producing neonates, while mortality reached 98% at 40 Gy. These results are consistent with reported results for gamma irradiation of NOW larvae where sterility was observed somewhere between the 30 Gy and 60 Gy data points, but mortality was high. This further confirms the lack of suitability of NOW irradiated in the larval stage, whether by gamma or x-ray, and supports the hypothesis that x-ray and gamma treatments are biologically equivalent at equal doses. |
| Databáze: | OpenAIRE |
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