Effects of Mistletoe and Other Defects on Lumber Quality in White Fir

Authors

  • W. Wayne Wilcox
  • W. Y. Pong
  • J. R. Parmeter

Keywords:

Abies concolor, lumber grade recovery, overrun

Abstract

The presence or absence of defects, including dwarf and true mistletoes, was determined for logs from twenty white fir trees. Grade and volume were determined for all boards sawed from these logs. Differences between defect categories and logs without defect, with regard to degrade and overrun, were not statistically significant. With the exception of shop grades derived from logs containing dwarf mistletoe, differences between logs without defect and those with defect were not statistically significant after the effect of diameter was accounted for; even in this single exception, the volume derived from dwarf mistletoe logs was greater than that derived from no-defect logs. This suggests that the presence in logs of dwarf mistletoe, true mistletoe, and the other defects considered in this study either does not adversely affect lumber grade or that present quality control procedures are ineffective in detecting the changes. The latter possibility appears most likely.

References

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Published

2007-06-05

Issue

Number 4 / Winter 1973

Section

Research Contributions

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