48 JOURNAL OF FORESTRY 



Table 4 gives data taken on a private cutting twelve years following 

 logging operations. This plat is a good illustration of the results to 

 be expected in the western white pine type of forest when no atten- 

 tion is paid to disposal of slash and brush, and no definite plan is 

 made before logging to secure a maximum return from future cuttings. 

 It is typical of the majority of private logging operations which are 

 not under Forest Service supervision and may give some idea of the 

 development of fungous sporophores where no forest regulation is 

 practiced. 



The area has a high fire hazard during the dry season, due to the 

 tangled condition of the brush, slash, and windfalls left on the area. 

 The trees left on the area after logging, along with the reproduction 

 which has since developed, form a fairly dense covering, producing 

 much shade. This, combined with the heavy annual rainfall, creates 

 a favorable environment for the development of fvmgous sporophores. 

 The data show that on the two acres surveyed, there were 22 pieces 

 of infected slash left on the area, which bore a total of 307 fruiting 

 bodies of the more harmful fungi. Of this total, 212 of those pro- 

 duced after logging were alive and 40 dead, and 13 of those produced 

 before logging were alive and 42 dead. Again, in this sample plat the 

 sporophores of Trametes pini are found to be the most abundant, 

 being 88.5 per cent of the total sporophores recorded. Of the total 

 Trametes pini sporophores 85 per cent were alive. Echinodontiiiin 

 tinctoriiim was second in abundance, with a much lower figure, 5.8 

 per cent. An interesting part of the data in Table 4 is the large 

 number of sporophores of Trametes pini found on certain of the cull 

 logs and tops. One side of one of the logs was literally covered with 

 them, and little space left for new ones to appear. On this area it 

 was noted that where infected slash was left in openings where sun 

 and air were important drying factors, comparatively fewer sporo- 

 phores appeared following the logging operation. 



Three of the areas showed the sporophores of T. pini to be the 

 most numerous, and a high percentage of the total were found to be 

 alive. This fungus is one of the most widespread and destructive 

 found attacking forest trees. Its rapid spread through a growing 

 forest, and its ability to develop abundantly and over long periods of 

 time upon down timber,^- -' make it, possibly, the most important 

 fungus considered in the study. All of the infected slash given in 

 the tables and producing sporophores was material in close contact 

 with the ground. In many cases upon sale-areas where saprophytic 

 fungi were found attacking down material, it was noted that the de- 



