Effects of gamma radiation on Ephestia cautella (WLK.) (Lepidoptera, Phycitidae)—III. Effect of dose-rate on male sterility

Gönen, Mustafa Sait; Calderon, M.

doi:10.1016/0022-474x(73)90017-9

Cited by 9 publications

(9 citation statements)

References 10 publications

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“…The results of this simple experiment were clear, though contradictory to previous reports 20 , 21 , 23 , 28 – 30 . The low dose rate had a higher impact on the reproductive biology in both species, with higher sterility levels achieved for both medium and high doses (targeting sterility levels of 75% and near 100%).…”

Section: Resultscontrasting

confidence: 99%

“…Some studies are available, investigating dose rate effects on lethality 20 – 22 , insect quality 5 , 23 – 25 , and sterility 21 , 25 – 28 but the results have largely been contradictory.…”

Section: Introductionmentioning

confidence: 99%

“…There are on the one hand a series of studies that showed higher damage with higher dose rates when applying a high total absorbed dose. Gonen and Calderon 28 found that dose rates of 110 Gy min −1 administered to males of the cacao moth Ephestia cautella induced greater sterility than 28 Gy min −1 with total absorbed doses of 200, 300, and 400 Gy. A similar trend was observed in the sawtoothed grain beetle Oryzaephilus surinamensis 21 .…”

Section: Introductionmentioning

confidence: 99%

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Radiation dose-rate is a neglected critical parameter in dose–response of insects

Yamada

Dias²,

Parker³

et al. 2022

Sci Rep

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Reproductive sterility is the basis of the sterile insect technique (SIT) and essential for its success in the field. Numerous factors that influence dose–response in insects have been identified. However, historically the radiation dose administered has been considered a constant. Efforts aiming to standardize protocols for mosquito irradiation found that, despite carefully controlling many variable factors, there was still an unknown element responsible for differences in expected sterility levels of insects irradiated with the same dose and handling protocols. Thus, together with previous inconclusive investigations, the question arose whether dose really equals dose in terms of biological response, no matter the rate at which the dose is administered. Interestingly, the dose rate effects studied in human nuclear medicine indicated that dose rate could alter dose–response in mammalian cells. Here, we conducted experiments to better understand the interaction of dose and dose rate to assess the effects in irradiated mosquitoes. Our findings suggest that not only does dose rate alter irradiation-induced effects, but that the interaction is not linear and may change with dose. We speculate that the recombination of reactive oxygen species (ROS) in treatments with moderate to high dose rates might minimize indirect radiation-induced effects in mosquitoes and decrease sterility levels, unless dose along with its direct effects is increased. Together with further studies to identify an optimum match of dose and dose rate, these results could assist in the development of improved methods for the production of high-quality sterile mosquitoes to enhance the efficiency of SIT programs.

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Section: Resultscontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Radiation dose-rate is a neglected critical parameter in dose–response of insects

Yamada

Dias²,

Parker³

et al. 2022

Sci Rep

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“…Bletchly (1961) reported no difference between two dose rates (0.5 and 11.5 Gy/min) at doses (60 Ð 80 Gy) that prevented adult emergence from irradiated Anobium punctatum (De Geer) middle-aged larvae. Gonen and Calderon (1973) found that dose rate was directly related to male reproductive sterility of E. cautella when the doseÐrate ratio was as little as 3:1; egg hatch was 15 and 1% for the lower and higher dose rates, respectively. Dohino et al (1994) compared electron beam to gamma ray (cobalt 60) for effect on eclosion of Tetranychus urticae Koch eggs and found no signiÞcant difference (Fig.…”

Section: Phytosanitary Irradiation Variablesmentioning

confidence: 97%

Factors Affecting Ionizing Radiation Phytosanitary Treatments, and Implications for Research and Generic Treatments

Hallman¹,

Levang-Brilz²,

Zettler³

et al. 2010

jnl. econ. entom.

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Phytosanitary irradiation (PI) treatments are promising measures to overcome quarantine barriers to trade and are currently used in several countries. Although PI has advantages compared with other treatments one disadvantage bedevils research, approval, and application: organisms may remain alive after importation. Although this does not preclude their use as a phytosanitary treatment, it does leave the treatment without an independent verification of efficacy and places a greater burden for assuring quarantine security on the research supporting the treatment. This article analyses several factors that have been hypothesized to affect PI efficacy: low oxygen, pest stage, host, dose rate, and temperature. Of these factors, the first is known to affect efficacy, whereas host and dose rate probably need more research. The International Plant Protection Convention considered several PI treatments for its international standard on phytosanitary treatments and did not approve some at first because of perceived problems with the research or the presence of live adults after irradiation. Based on these concerns recommendations for research and dealing with the issue of live adults postirradiation are given. Generic PI treatments are suggested.

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“…hypothesized that an increased dose rate leads to increased irradiation efficacy because it overwhelms radiation repair mechanisms. A faster dose rate has previously been shown to be harmful to insects based on male reproductive development and larval or pupal development, yet no significant effects of dose were found in either survival rate or egg hatching in previous studies . The comparisons of our own studies using T. ni suggest that the higher dose rate is less harmful to the insects when other factors are assumed to be the same.…”

Section: Resultsmentioning

confidence: 46%

Critical PO₂ as a diagnostic biomarker for the effects of low‐oxygen modified and controlled atmospheres on phytosanitary irradiation treatments in the cabbage looper Trichoplusia ni (Hübner)

Chen

Condon

Boardman

et al. 2020

Pest Management Science

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BACKGROUND: Phytosanitary irradiation is a sustainable alternative to chemical fumigants for disinfesting fresh commodities from insect pests. However, irradiating insects in modified atmospheres with very low oxygen (<1 kPa O 2 ) has repeatedly been shown to increase radioprotective response. Thus, there is a concern that modified atmosphere packaging could reduce the efficacy of phytosanitary irradiation. One hurdle slowing the widespread application of phytosanitary irradiation is a lack of knowledge about how moderate levels of hypoxia relevant to the modified atmosphere packaging of most fresh commodities (3-10 kPa O 2 ) may affect phytosanitary irradiation treatments. Therefore, we hypothesize that critical PO 2 (P crit ), the level of oxygen at which an insect's metabolism becomes impaired, can be used as a diagnostic biomarker to predict the induction of a radioprotective response.RESULTS: Using the cabbage looper Trichoplusia ni (Hübner), we show that there is a substantial increase in radiation resistance when larvae are irradiated in atmospheres more hypoxic than their P crit (3.3 kPa O 2 ). These data are consistent with our hypothesis that P crit could be used as a diagnostic biomarker for what levels of hypoxia may induce radioprotective effects that could impact phytosanitary irradiation treatments.CONCLUSION: We propose that the relationship between P crit and radioprotective effects could allow us to build a framework for predicting the effects of low-oxygen atmospheres on the efficacy of phytosanitary irradiation. However, more widespread studies across pest species are still needed to test the generality of this idea.

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Effects of gamma radiation on Ephestia cautella (WLK.) (Lepidoptera, Phycitidae)—III. Effect of dose-rate on male sterility

Cited by 9 publications

References 10 publications

Radiation dose-rate is a neglected critical parameter in dose–response of insects

Radiation dose-rate is a neglected critical parameter in dose–response of insects

Factors Affecting Ionizing Radiation Phytosanitary Treatments, and Implications for Research and Generic Treatments

Critical PO₂ as a diagnostic biomarker for the effects of low‐oxygen modified and controlled atmospheres on phytosanitary irradiation treatments in the cabbage looper Trichoplusia ni (Hübner)

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Effects of gamma radiation on Ephestia cautella (WLK.) (Lepidoptera, Phycitidae)—III. Effect of dose-rate on male sterility

Cited by 9 publications

References 10 publications

Radiation dose-rate is a neglected critical parameter in dose–response of insects

Radiation dose-rate is a neglected critical parameter in dose–response of insects

Factors Affecting Ionizing Radiation Phytosanitary Treatments, and Implications for Research and Generic Treatments

Critical PO2 as a diagnostic biomarker for the effects of low‐oxygen modified and controlled atmospheres on phytosanitary irradiation treatments in the cabbage looper Trichoplusia ni (Hübner)

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Product

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Critical PO₂ as a diagnostic biomarker for the effects of low‐oxygen modified and controlled atmospheres on phytosanitary irradiation treatments in the cabbage looper Trichoplusia ni (Hübner)