OCR Text |
Show Y Poor Lumber Handling Negates Treatment Benefit Poor and lax methods of handling the treatment of cut lumber to prevent pre-vent wood-staining during curing is held responsible for the appearance of discolorations in treated green lumber, according to A. F. VerraU, of the United States department of agriculture, as a result of studies conducted in co-operation with the Southern Forest experiment station. During the last 10 years, Verrall states, the use of effective chemical treatments to protect lumber from fungous stains during the air seasoning season-ing period has become general, particularly par-ticularly in the southern states. Occasionally, Oc-casionally, however, mills report severe se-vere staining of treated lumber. For the most part, these failures are due to poor handling practice ahd not to the failure of the treatments. treat-ments. Too long storage of logs, allowing al-lowing for infection of pine logs particularly par-ticularly with fungi carried by the Ips beetles, and infection of hard woods at the ends and with fungi carried by ambrosia beetles, and too long an interval between the milling operation and the chemical treatment treat-ment appear to be practices responsible respon-sible for many cases of treatment failure in the South. Protracted periods of weather unfavorable un-favorable for drying, Verrall continues, con-tinues, may cause general failure of chemical treatments, but this cause appears to be a less frequent one than poor handling practices. |