53-'2 Forestry Quarterly. 



one- fourth as effective as sulfuric, while formalin was about 

 one-half as efficient. 



Nine series of tests, with three species of pines, during two 

 seasons' use of sulfuric acid, show 65% better germination on 

 treated plots than untreated, while the loss from damping-off 

 averaged less than 45% of that on the control plots, and the final 

 stand was over 4I times as great. The author does not recom- 

 mend sulfuric acid as a general soil fungicide. It is probably not 

 adapted to limestone soils or applicable to Angiosperms. 



Use of Soil Fungicides to prevent damping-off of coniferous seedlings. 

 Proc. Soc. Am. Foresters. Pp. <^-<^. March, 1912. 



Professor Fink reports a disease of the 



New Disease leaves and twigs of mature trees of Pinus 



of strobus on the college campus at Oxford, 



White Pine. Ohio, due to the discomycete, Cenangium 



abietis (Pers.) Dub. A group of six trees 

 was affected, the injury being on the northeast side and embracing 

 the lower half or two-thirds of the crown. The twigs bearing the 

 dead leaves were provided with erumpent blackish tubercles 

 which expand into the saucer-shaped fruit-bodies when moistened. 

 The terminal bud was dead in all cases, which seems to indicate 

 that infection occurred at or near it. The diseased trees were on 

 the crest of a hill and were probably rendered susceptible by the 

 severe drought of the previous year, for other near by specimens 

 on lower ground were still healthy. 



This appears to be the first report of this fungus playing a 

 part in the death of trees in North America, although it has been 

 noted in Maine, Alabama, Colorado, Nevada and California. The 

 author cites Brunchorst's investigations on the destruction of 

 Austrian Pine in Norway in 1887, and Schwarz' admirable 

 monograph on the same disease on Scotch Pine in Germany in 

 1891-2, both of whom lay the blame on Cenangium. Owing to 

 the lack of viable spores when wanted Professor Fink did not 

 conduct infection experiments. He does not concern himself 

 with nomenclature, but says that, according to the recent rules, 

 the fungus would be known as Cenangium ferruginosum Fr. 



Injury to Pinus Strobus caused by Cenangium abietis.. Phytopathology. 

 Pp. 180-183, pi. 26. Dec, 191 1. 



