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Debarking Issue – Bark

Debarking Issue – Bark. WPA Meeting, January 2008. Report from IFQRG. Bark is perhaps the most controversial area of them all. Various surveys and experiments carried out to aid analysis of the risk posed by bark

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Debarking Issue – Bark

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  1. Debarking Issue – Bark WPA Meeting, January 2008

  2. Report from IFQRG • Bark is perhaps the most controversial area of them all. • Various surveys and experiments carried out to aid analysis of the risk posed by bark • scientific evidence (IFQRG) shows that bark remains viable for post-treatment infestation • in some cases heat treated bark is more susceptible to attack • Questions? • How much infested bark is actually on WPM in use? • How much bark is too much bark? • Does bark affect treatment efficacy

  3. IFQRG Bark • IPPC survey 2007 results: • 35 countries took part • WPM with bark from 80 countries assessed • 8626 units had bark • 41% pallets; 29% dunnage; 26% crates or boxes • bark size ranged from 0.25 - 8040 2 cm • 57% < 50 2 cm (credit card) • 41% >50 2 cm, < 630 2 cm (A4 paper size) • average width 3.1 cm (73% < 3 cm wide) • 13 insects found • in at least 5, evidence suggests treatment failure • other 8 could have been treatment failure or post-treatment attack.

  4. IFQRG Bark • The TPFQ proposes: • “Removal of bark • Irrespective of the frequency of their occurrence on an individual unit of wood packaging material, pieces of bark greater than 3 cm in width should not be permitted on wood packaging moving in international trade unless the total surface area of the bark piece is less than 50 2 cm. (for example, long thin strips of bark less than 3 cm in width may be present).”

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