Effects of X‐ray irradiation on the fitness of the established invasive pest fall armyworm<i>Spodoptera frugiperda</i>

Jiang, Shan; He, Limei; He, Weiyi; Zhao, Hui-Yuan; Yang, Xinming; Yang, Xue; Wu, Kongming

doi:10.1002/ps.6903

Cited by 17 publications

(19 citation statements)

References 51 publications

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“…The flight capacity of Teia anortoides was unaffected by γ-ray radiation of 160 Gy ( Suckling et al, 2002 ). The flying ability of S. frugiperda was not affected when the dose of X-ray was lower than 300 Gy ( Jiang et al, 2022 ). Their findings are nearly identical to ours.…”

Section: Discussionmentioning

confidence: 99%

Effect of X-ray irradiation on development, flight, and reproduction of Spodoptera litura

Jiang

et al. 2022

Front. Physiol.

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Spodoptera litura is an omnivorous pest that has spread globally. Because irradiation sterilization technology has a great potential for control of S. litura, the effect of 25–150 Gy doses of X-rays on pupal survival, flight and reproductive variables of adult moths were analyzed in this research. The X-ray irradiation with the dose of 25–150 Gy significantly affected the reproductive ability of females. Irradiating male pupae with 25–150 Gy doses of X-rays had no effect on mating, life span, or flight ability of adult moths, but significantly reduced survival and fecundity of their offspring, and the sterility rate of the F1 generation was 52.65%–99.9%. The results of logistic curve fitting showed that the sterility impact was 84% at the most appropriate irradiation dose (71.26 Gy). The sterility control was 91% in an indoor mating competition experiment when the release ratio of irradiated males (75 Gy) to nonirradiated males reached 12.6:1. The effects of X-ray irradiation doses on biological variables of S. litura and the most effective release ratio determined here provide a theoretical foundation for using radiation sterilization technology to control S. litura.

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Section: Discussionmentioning

confidence: 99%

Effect of X-ray irradiation on development, flight, and reproduction of Spodoptera litura

Jiang

et al. 2022

Front. Physiol.

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“…The choice of appropriate radiation dose for Lepidoptera is complicated because they are relatively radiation-resistant compared with other insects (Bloem et al ., 2003; Thistlewood and Judd, 2019; Jiang et al ., 2022). Therefore, the radiation dose employed had to effect a compromise between the levels of sterility-induced males and their competitiveness in mating with wild moths (Bloem et al ., 1999 a , 1999 b ; Blomefield et al ., 2010).…”

Section: Discussionmentioning

confidence: 99%

Sterility ofCydia pomonellaby X ray irradiation as an alternative to gamma radiation for the sterile insect technique

Zhang

Zhao³

et al. 2022

Bull. Entomol. Res.

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The codling moth Cydia pomonella is a major pest of global significance impacting pome fruits and walnuts. It threatens the apple industry in the Loess Plateau and Bohai Bay in China. Sterile insect technique (SIT) could overcome the limitations set by environmentally compatible area-wide integrated pest management (AW-IPM) approaches such as mating disruption and attract-kill that are difficult to suppress in a high-density pest population, as well as the development of insecticide resistance. In this study, we investigated the effects of X-ray irradiation (183, 366, 549 Gy) on the fecundity and fertility of a laboratory strain of C. pomonella, using a newly developed irradiator, to evaluate the possibility of X-rays as a replacement for Cobalt60 (60Co-γ) and the expanded future role of this approach in codling moth control. Results show that the 8th-day is the optimal age for irradiation of male pupae. The fecundity decreased significantly as the dosage of radiation increased. The mating ratio and mating number were not influenced. However, treated females were sub-sterile at a radiation dose of 183 Gy (20.93%), and were almost 100% sterile at a radiation dose of 366 Gy or higher. Although exposure to a radiation dose of 366 Gy resulted in a significant reduction in the mating competitiveness of male moths, our radiation biology results suggest that this new generation of X-ray irradiator has potential applications in SIT programs for future codling moth control.

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“…The irradiation was stopped and samples were collected when the total cumulative radiation dosage reached 250 Gy (3212 s). The used insects were male pupae that were 8 days old (1–2 days before emergence) [ 24 , 32 , 43 ] and exposed to radiation at ambient temperature.…”

Section: Methodsmentioning

confidence: 99%

“…Currently, China has approved the commercial planting of Bt maize [ 31 ]. If Bt maize is planted in the annual breeding area of the species during the winter, and sterile insects are released there, it is possible to control the density of S. frugiperda in the source area and significantly reduce the number of adults that migrate north in spring each year [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

“…In our previous study [ 32 ], the 8-day-old male pupae of S. frugiperda were exposed to X-rays at dosages ranging from 50 to 400 Gy, and 250 Gy dose had no significant effect on biological parameters such as emergence and life span of male pupa, but it could make the egg sterility rate reach 85%. In this study, male pupae of S. frugiperda were irradiated with a dose of 250 Gy to assess their ability to compete for mating in a laboratory environment.…”

Section: Introductionmentioning

confidence: 99%

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Mating Competitiveness of Male Spodoptera frugiperda (Smith) Irradiated by X-rays

Jiang

Sun

et al. 2023

Insects

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Spodoptera frugiperda, an invasive pest, has a huge impact on food production in Asia and Africa. The potential and advantages of sterile insect techniques for the permanent control of S. frugiperda have been demonstrated, but the methods for their field application are still unavailable. For the purposes of this study, male pupae of S. frugiperda were irradiated with an X-ray dose of 250 Gy to examine the effects of both the release ratio and the age of the irradiated males on the sterility of their offspring. The control effect of the irradiated male release ratio on S. frugiperda was evaluated using field-cage experiments in a cornfield. The results showed that when the ratio of irradiated males to non-irradiated males reached 12:1, the egg-hatching rate of the offspring of S. frugiperda decreased to less than 26%, and there was also no significant difference in mating competitiveness among the different ages. Field-cage testing showed that when irradiated males were released at ratios of 12:1–20:1 to normal males, the leaf protection effect for the corn reached 48–69% and the reduction in the insect population reached 58–83%. In this study, an appropriate release ratio is suggested, and the mating competitiveness of irradiated and non-irradiated males of S. frugiperda is investigated, thus providing a theoretical basis for the use of sterile insect techniques to control S. frugiperda.

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Effects of X‐ray irradiation on the fitness of the established invasive pest fall armywormSpodoptera frugiperda

Cited by 17 publications

References 51 publications

Effect of X-ray irradiation on development, flight, and reproduction of Spodoptera litura

Effect of X-ray irradiation on development, flight, and reproduction of Spodoptera litura

Sterility ofCydia pomonellaby X ray irradiation as an alternative to gamma radiation for the sterile insect technique

Mating Competitiveness of Male Spodoptera frugiperda (Smith) Irradiated by X-rays

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