276 forestry Quarterly. 



age, some plants suffering more than others, the degree of dam- 

 age depending in the first place on temperature ; when this ex- 

 ceeds' 25° C the damage is insignificant, but when it is raised 

 to 40-45° C the damage increases rapidly, so that even woody 

 plants succumb. The dust arising from tar coverings is also 

 damaging, especially on young leaves. Some plants lose their 

 foliage, in others the leaves remain small, become red, or red 

 spots develop, or they even develop specially protective tissue. 

 The author recommends to be careful in the choice of tars, not 

 to tar the road in its entire breadth, but leave a strip along the 

 row of trees, so as to keep bole and root system free, and to 

 choose trees which are more resistant to this kind of damage. 



Uher die pHansenschddliche Wirkung dcs Teers. Centralblatt f. d. g. 

 Forstwesen, November, 1913, pp. 497-504. 



A. H. Graves discusses diseases of the 

 Tree Scrub pine {Finns znrginiana) and in addi- 



Diseases tion to the writer's observations presents a 



in comprehensive outline of the pathological 



Southern data concerning this species. The tree was 



Appalachians. found to be subject to the attack of a variety 

 of insects, which cause locally considerable 

 damage. Of the fungous diseases, the most important is the "burl 

 disease" caused by Cronartium quercus. It is also occasionally 

 affected with heart rot produced by Trametes pint, and to a lesser 

 degree by a rust, Gallozvaya pini, causing a "leaf cast." Among 

 injuries due to inorganic agencies are mentioned, windthrow un- 

 der certain conditions, and occasional damage from ice and snow. 

 In spite of the loss from these causes the writer states that "the 

 species considered as a whole may be looked upon as being, in 

 general, in a thrifty condition." 



Phytopathology, 1914, IV, No. i, pp. S-io. 



This new disease has been causing local 

 Bark damage in various plantations near New 



Disease Haven and elsewhere in the state of Con- 



of necticut. Its exact nature is not known, 



White Pine. states A. H. Graves'. The first indication 

 is a slight yellowish cast to the foliage, read- 

 ily noticeable at considerable distance. Examination of the trunk 



