Evaluation of Low-Temperature Phosphine Fumigation for Control of Oriental Fruit Fly in Loquat Fruit

Journal of Economic Entomology
Tao LiuYuejin Wang

Abstract

Oriental fruit fly, Bactrocera dorsalis (Hendel; Diptera: Tephritidae), is recognized as a quarantine pest and a threat to Chinese loquat (Eriobotrya japonica Lindl.) fruit exports. Since loquat fruit is very sensitive to methyl bromide (MB) fumigation and cold treatment, in this study, low-temperature phosphine (PH3) fumigation was investigated to develop an alternative phytosanitary treatment method. Tolerance tests showed that the third instar was the most tolerant of all life stages of B dorsalis to PH3 gas at 8°C. Toxicity assay with 500-3000 ppm PH3 and subsequent probit analysis showed that 2000 ppm PH3 was optimal for fumigation and 152.75 h of treatment duration were required to achieve 99.9968% mortality. In the verification test, 144 and 168 h of treatment duration with 2000 ppm PH3 completely killed 35,277 and 35,134 B. dorsalis third instars, respectively. However, 13 live larvae were found after 120 h of treatment. Furthermore, these treatments reduced fruit respiration rates while causing no adverse effects on other fruit quality parameters, including firmness, soluble solid content, and titratable acidity over 192 h storage at 8°C. The results strongly suggest that low-temperature PH3 fumigation could be used fo...Continue Reading

References

Dec 8, 2005·Annual Review of Entomology·Peter A Follett, Lisa G Neven
Jan 24, 2008·Current Biology : CB·Jonathan M Levine
Feb 12, 2011·Journal of Economic Entomology·Liu BoWang Yuejin
Jul 22, 2011·Journal of Toxicology·Nisa S NathPaul R Ebert
Sep 12, 2013·Journal of Economic Entomology·Yong-Biao LiuScott W Myers
Jan 8, 2014·Journal of the Science of Food and Agriculture·Sunil PareekElhadi M Yahia
Feb 7, 2014·Journal of Economic Entomology·Guy J HallmanMarc J B Vreysen
Apr 29, 2014·Mitochondrion·Valeria E PerottiFlorencio E Podestá
Apr 30, 2014·Journal of Economic Entomology·Li LiYuejin Wang
Jan 1, 2014·Horticulture Research·Susan Lurie, Romina Pedreschi

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