Winter Treatments Protect Birch Roundwood During Storage

When ends of bolts and veneer logs of paper birch were sprayed with fungicides and coated with vapor-resistant compounds during cold months in northern Wisconsin and upper Michigan, they were protected from serious decay throughout the ensuing warm months. No significant disadvantage of treating in the coldest weather was noted except that the end-coating compound had to be warmed until of spreading consistency. In comparatively cold weather, treating could be greatly delayed without much deterioration; bolts cut in November and January and treated in March deteriorated little. Delaying treating until the warmer weather of April gave less protection. An end-coating was necessary to prevent checking of the sprayed surface if logs were stored into spring and summer. Basic guidelines are provided to protect northern hardwood logs and bolts during storage.

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