Journal of Economic Entomology (2018) 111, 135-140

Monnipa Srimartpirom, Intawat Burikam, Wanich Limohpasmanee, Titima Kongratarporn, Thodsapon Thannarin, Apita Bunsiri and Peter A. Follett (2018)
Low-dose irradiation with modified atmosphere packaging for mango against the Oriental fruit fly (Diptera: Tephritidae)
Journal of Economic Entomology 111 (1), 135-140
Abstract: Irradiation is used to disinfest the oriental fruit fly, Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) and other pests on mango fruits before export from Thailand to foreign markets. Modified atmosphere packaging (MAP) used during export of mangoes creates a low-oxygen environment that may reduce the efficacy of quarantine irradiation treatment against B. dorsalis. 'Nam Dok Mai' mangoes infested with third-instar larvae of B. dorsalis, wrapped with three different kinds of MAP bags (CF1, FF5, and H34M) or no MAP, were treated with gamma radiation at 0 (control), 30, 60, 90, 120, and 150 Gy. The average O₂ and CO₂ concentrations in MAP bags with mangos were 7.2 and 8.7% in the H34M bag, 8.6 and 21.2% in the CF1 bag, and 9.6 and 26.7% in the FF5 bag, respectively. The use of MAP on infested mangoes significantly increased mortality of B. dorsalis under irradiation treatment. The estimated lethal doses to cause 99% mortality (LD₉₉) for no MAP and MAP (CF1, FF5, and H34M bags) treatments were 58.1, 41.6, 43.8, and 47.4 Gy, respectively. Therefore, MAP acted as an additional stressor rather than providing radioprotection in irradiated B. dorsalis. Large-scale confirmatory testing of 35,000 B. dorsalis larvae treated at a radiation dose of 150 Gy in mangoes with H34M MAP bags produced no survivors to the adult stage. Commercial use of MAP producing the O₂ levels that we observed for mangos in this study will not reduce the efficacy of the approved 150 Gy quarantine irradiation treatment for B. dorsalis.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Peter A. Follett

Research topic(s) for pests/diseases/weeds:
control - general
quarantine treatments/regulations/aspects

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bactrocera dorsalis	Mango (Mangifera indica)	Thailand