Anti-Sapstain Biocides for Fresh Southern Hardwood Logs When Delays Occur between Felling and Water-Spray Storage

摘要

Sapwood discolorations in highly valued southern hardwood species have been a costly problem for the U.S. forest products industry. Mold and sapstain fungal occurrences are more prevalent in the southeast than in other regions, so preventive measuresmust be implemented to keep hardwood logs and lumber discoloration-free. Since conditions that favor stain development are prolonged after tree felling, logs that cannot be transported to a water-storage facility within 7 days after felling should have abiocide applied to their ends and, preferably, their debarked areas. Treatment practices should incorporate accurate and consistent chemical/water concentrations, proper spray applicators, and sufficient coverage of freshly exposed log cross-sections within 24 hours of tree felling to prevent the growth of sapstain fungi for approximately 6 weeks.