© 1970 by Institute of Chartered Foresters
Control of Blue-stain in Unbarked Pine Logs by a Fungicide and an Insecticide
1 Forest Products Research Laboratory Princes Risborough, Aylesbury, Bucks
2 Forest Research Station Alice Holt, Farnham, Surrey
Billets cut from unbarked Scots pine logs felled in Thetford Chase at monthly intervals from May 1966 to September 1967 were treated with 0·75 per cent lindane, 5 per cent tribromophenol, or 0·75 per cent lindane +5 per cent tribromophenol in solution in light mineral oil. Treated billets and untreated controls were stored, in contact with the ground, in a forest ride for 3 months and then examined for staining after cross-cutting. Appreciable staining of the wood occurred only from March to August though staining of the log ends was never entirely absent even during the winter months. Staining was most effectively controlled by the combined lindane/tribromophenol treatment; application of this from April-August should, in practice, cause substantial reduction in log staining.