DISPOSAL OF IXI-l'XTl'.l) SLASH -I."; 



1!M7. The stand originally consisted of a mixture of western larch 

 (Larix occidcnlalis), Douglas fir, lodgcpole pine (Pinus contorta), 

 and western yellow pine (Pinus pondcrosa). The majority of the 

 larch cut were long-hutted, and the rejected parts were left (jn the area. 

 A large amount of slash of all species was left on the area, including 

 infected snags, a few old windfalls, and considerahle rejected unmer- 

 chantable wood. On an area of approximately one acre, sporophores 

 of Pomes laricis growing on larch were noted as follows : On one 

 standing dead snag, 2 sporophores, 1 live and 1 dead; 1 windfall, 

 3 live sporophores; on 5 rejected butts and ?> stumps, 10 sporophores. 

 8 live, and 2 dead. On one windfall of Douglas fir 2 large and live 

 groups containing 14 fruiting bodies of Polyporus sulphureiis were 

 found, and 1 live group containing G fruiting bodies of the same 

 fungus on one butt log which had been culled. Of Pomes pinicola 

 on the stumps, cull sections and windfalls of the various conifers 

 represented on the area, 18 sporophores were found. Most of these 

 were dead, having developed soon after the area had been cut over. 

 The above items, sunmiarized, give a total of 35 live and dead sporo- 

 pho'-es (excluding P. pinicola) of the more harmful fungi found upon 

 cull material on this area. Each of these at one time or another, 

 since the area was cut, produced a large number of spores, of which a 

 few no doubt found their way to nearby susceptible trees and infected 

 them. The Douglas fir windfall infected with P. snlphnrcns was 

 found to have fallen across an old log badly rotted by the above fungus. 

 'i'h« contact between the two was such as to allow of the infection of 

 the Douglas fir by growth of mycelium from the old log. 



The following tables give a summary of the number and species of 

 sporophores found upon three separate logging areas. The number 

 of cull logs, poles, stumps, etc., upon which the sporophores were 

 found, was, unfortunately, not recorded. The number of pieces of 

 cull is, however, not as important in this connection as the total num- 

 ber of harmful sporophores produced upon the area. All of the species 

 of fungi, excejjting one, given in the tables, are of pathological im- 

 portance in the regions indicated, and are found attacking living trees. 

 C)f the entire list Pomes pinicola is the least important, since it is 

 primarily a saproj^hyte developing upon dead material, and rarely 

 attacks living trees as a heartwood fungus. Table 1 gives data on a 

 cut-over area 10 years following logging operations in the Priest 

 River region of Idaho, 'j'he site, both before and after logging, was 

 favorable to fungous growth, although to a lesser degree after cutting. 

 due to the opening up of the stand. The stand was of the western 



