Write a short summary for this text: plant health officials confirmed thursday that fresh mangoes a passenger tried to smuggle through the taoyuan international airport last month contained larvae of one of the most hated fruit pests -- the peach fruit fly .

Summary:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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peach fruit fly larvae found in smuggled mangoes at airport