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How often does the WPM need to be re-treated?

re-treated wpm
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How often does the WPM need to be re-treated?

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Acceptable treatments (i.e., heat treatment or fumigation with methyl bromide) need only be done once. Once the WPM are properly treated and marked by an approved treatment facility in any country, the mark will be accepted as proof of compliance for the life of the WPM.

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