Gamma radiation as a phytosanitary treatment against larvae and pupae of Bactrocera dorsalis (Diptera: Tephritidae) in guava fruits

Jupeng, Zhao; Ma, Jingyun; MuTao, Wu; Jiao, Xiaoguo; Wang, Zhanggen; Fan, Li; Gao, Zhan Guo

doi:10.1016/j.foodcont.2016.02.029

Cited by 24 publications

(21 citation statements)

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“…Cold treatment requires maintaining the fruits at 0–2.2 °C for at least 12 days, and is therefore time consuiming . For phytosanitary irradiation, although its efficacy has been confirmed by several previous studies, its commercial adoption was restricted by regulatory issues and slow consumer acceptance . Moreover, some varieties of Citrus are not tolerant to irradiation treatment, which limits this potential of this method for quarantine treatment …”

Section: Introductionmentioning

confidence: 99%

Postharvest treatment of mandarin fruit using a combination of methyl bromide and phosphine against Bactrocera dorsalis (Diptera: Tephritidae)

Zhang

et al. 2020

Pest Management Science

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BACKGROUND Chinese Nanfeng mandarin (Citrus reticulate Blanco ‘2–6’) fruit is host to the oriental fruit fly Bactrocera dorsalis Hendel, and therefore requires phytosanitary treatment before exporting abroad. The use of methyl bromide (MB) should be reduced because it has phytotoxic and ozone depleting properties. In the present study, fumigations with mixtures of gaseous phosphine (PH3) and MB were conducted to disinfest B. dorsalis. The effect of combined fumigation on postharvest quality of Nanfeng mandarin fruit was then evaluated. RESULTS There was a clear synergistic effect between MB and PH3 against B. dorsalis at 20 °C. The third‐instar larvae of B. dorsalis were the most tolerant to treatment with both MB alone and combined with PH3. Toxicity assay of third instars indicated that higher PH3 concentrations increased MB toxicity, and 1.42–2.84 g m−3 of PH3 was optimal when combined with MB. Probit analysis showed that, combined with 2.13 g m−3 PH3, similar mortality was achieved with 50% of the MB required when applied alone. Furthermore, the fruit quality test showed that MB fumigation resulted in a higher respiration rate and >40% fruit rot after storage. The combined treatment reduced these effects and did not have adverse effects on fruit firmness, soluble solid content, titratable acidity, or vitamin C content. CONCLUSION Our findings demonstrate the synergistic effect between PH3 and MB and indicate that this treatment has potential as a novel strategy for postharvest control of B. dorsalis, especially in MB‐sensitive fruit. © 2019 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Postharvest treatment of mandarin fruit using a combination of methyl bromide and phosphine against Bactrocera dorsalis (Diptera: Tephritidae)

Zhang

et al. 2020

Pest Management Science

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“…Another advantage of applying irradiation at the pupae stage is ease of transport. There has been a great deal of research and application of irradiation at the pupae stage due to the convenience of operation and transportation, such as the investigations on Aedes albopictus (Oliva et al, 2013 ), Melolontha vulgaris (Oliva et al, 2012 ), and especially in dipteran insects (Follett and Armstrong, 2004 ; Zhao et al, 2017 ). While accounting for factors, such as mating competitiveness, flight capability and the quality of population, this laboratory study indicates that the application of gamma irradiation at doses between 150 and 200 Gy to the pupae stage of B. tau could ensure sterilization in a control program.…”

Section: Discussionmentioning

confidence: 99%

Behavioral, Morphological, and Gene Expression Changes Induced by 60Co-γ Ray Irradiation in Bactrocera tau (Walker)

et al. 2018

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The sterile insect technique (SIT) may reduce pest populations by allowing sufficient amount of irradiation-induced sterile males to mate with wild females whilst maintaining mating ability comparable to wild males. Although the SIT methods are well understood, the optimal sterilizing dose and processing development stage for application vary among species. To ensure effective pest control programs, effects of irradiation on physiology, behavior, and gene function in the target species should be defined, however, little is known about irradiation effects in Bactrocera tau. Here, the effects of irradiation on rates of fecundity, egg hatch, eclosion, mating competitiveness, flight capability, morphology of reproductive organs, and yolk protein (YP) gene expression were studied. The results showed that rates of female fecundity and egg hatch decreased significantly (51 ± 19 to 0.06 ± 0.06 and 98.90 ± 1.01 to 0, respectively) when pupae were treated with >150 Gy irradiation. Flight capability and mating competitiveness were not significantly influenced at doses <250 Gy. Ovaries and fallopian tubes became smaller after irradiation, but there was no change in testes size. Finally, we found that expression of the YP gene was up-regulated by irradiation at 30 and 45 days post-emergence, but the mechanisms were unclear. Our study provides information on the determination of the optimal irradiation sterilizing dose in B. tau, and the effects of irradiation on physiology, morphology and gene expression that will facilitate an understanding of sub-lethal impacts of the SIT and expand its use to the control of other species.

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“…It is currently found in at least 65 countries, including most of Asia, much of the sub-Saharan countries of Africa, parts of America, Oceania, and Europe, but it is of quarantine significance to many other countries [1][2][3]. In China, the oriental fruit fly is one of the most destructive quarantine insects of tropical and subtropical fruits and vegetables, causing severe losses to citrus, guava, carambola, and mango [4,5]. Infested commodities are normally required to undergo phytosanitary treatments before export to regulated or quarantine areas [6].…”

Section: Introductionmentioning

confidence: 99%

“…Phytosanitary measures, including fumigation, temperature, and irradiation treatments, are currently used for shipped commodities, and the use of phytosanitary irradiation (PI) treatment has increased in recent years due to its advantages over other treatments; as a result, the global volume of different fresh products was approximately 30,000 tons in 2017 [3,4,[7][8][9]. In order to develop treatment schedules and facilitate the application of PI treatment, many kinds of tephritid fruit fly third-instar larvae have been used for conducting radiotolerance and confirmatory studies, such as the oriental fruit fly, B. dorsalis [4,[10][11][12]; the Mediterranean fruit fly, Ceratitis capitata Wiedemann [10,12]; the melon fly, Zeugodacus cucurbitae Coquillett [10,13]; and Z. tau Walker [14]. Currently, the International Plant Protection Convention (IPPC) is discussing draft standards related to irradiation treatment for B. dorsalis, Z. tau, and the genus Anastrepha to formulate international standards, as an annex to International Standard for Phytosanitary Measures (ISPM) No.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Radioprotective Effects on Late Third-Instar Bactrocera dorsalis (Diptera: Tephritidae) Larvae in Low-Oxygen Atmospheres

Gao

Jupeng

et al. 2020

Insects

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Ionizing radiation creates free radicals, the effect of which is enhanced by the presence of oxygen; a low oxygen level produces radioprotective effects for insects compared with irradiation in ambient air. Modified (controlled) atmosphere packaging is used for maintaining quality and shelf-life extension; therefore, treatment efficacy may be affected, and there is a need to determine the critical O2 levels that may cause radioprotective effects. Late third-instar Bactrocera dorsalis (Hendel) larvae were irradiated in bags filled with ambient or low-oxygen air (0%, 2%, 4%, 6%, 8% O2) and were exposed to radiation doses of 8 to 64 Gy with intervals of 8 Gy. Efficacy was measured by the prevention of adult emergence. Dose–response data on mortality (failure of adult emergence) were analyzed via two-way ANOVA (analysis of variance), ANCOVA (analysis of covariance), and probit regression. The difference in radiotolerance was only significant in 0% O2 atmospheres through two-way ANOVA; therefore, the 95% confidence limits (CLs) of lethal dose ratios at LD99 were used to determine significant differences between treatments at different O2 levels. The differences in radiotolerance were significant in 0% and 2% O2 but insignificant in 4%, 6%, and 8% O2 environments when compared with radiation in ambient air. The critical threshold of radioprotective effects for late third-instar B. dorsalis larvae is an O2 level of ≥4% and <6%, but a maximum radiation dose of 14 Gy can compensate for this effect during phytosanitary irradiation treatment.

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Gamma radiation as a phytosanitary treatment against larvae and pupae of Bactrocera dorsalis (Diptera: Tephritidae) in guava fruits

Cited by 24 publications

References 14 publications

Postharvest treatment of mandarin fruit using a combination of methyl bromide and phosphine against Bactrocera dorsalis (Diptera: Tephritidae)

Postharvest treatment of mandarin fruit using a combination of methyl bromide and phosphine against Bactrocera dorsalis (Diptera: Tephritidae)

Behavioral, Morphological, and Gene Expression Changes Induced by 60Co-γ Ray Irradiation in Bactrocera tau (Walker)

Radioprotective Effects on Late Third-Instar Bactrocera dorsalis (Diptera: Tephritidae) Larvae in Low-Oxygen Atmospheres

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