Stakes of Scots pine sapwood with a dimension of 4 x 4 x 75 cm³ were impregnated with preservatives containing 2 % of propiconazole which had passed the EN 113 test criteria without any problems. The penetration of the colourless preservative was determined successfully by a fungal screening test described by Sutter (1978). The test revealed the insufficient penetration behaviour within the given cross section (4 x 4 cm²) although the preservative uptake of approx. 610 kg/m³ indicated a full penetration.

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