EVALUATION OF WOOD PRESERVATIVES 



101 



is below what one would have to use commercially in order to insure 

 protection against Lentinus lepideus and to preserve wood exposed to 

 ground contact. 



As far as Lentinus lepideus is concerned, the best overall preservative 

 combination from the laboratory test would appear to be a 50/50 by 

 volume blend of the creosote and the penta-petroleum solution, since 

 such a blend appears to contain the best in both components. However, 

 there are certain practical considerations, principally relating to the 

 incompatibility of some creosotes and petroleums, which make the com- 

 bined preservative a difficult one to operate with commercially. 



(a) 



iCj 



(d) 



ng. 13-Across the threshold-creosote. Test fungus LenfmusZeptJ^eus,^^^^^^^^^^ 

 sote concentration at treatment: (a) 11.70; (b) 6.92; (c) 5.45; and (d) 4.15 Ib/cu ft. 



Fig. 



