164 Forestry Qtcarterly 



Cases where its attacks threatened the existence or thrift of 

 the stand may sometimes be best remedied by application of kero- 

 osene emulsion if the pine must be kept for soil cover. In the 

 majority of cases such extreme remedies are not warranted and 

 it is to be merely borne in mind that when opportunity offers up- 

 on the removal of the present stand a change of species is desir- 

 able. Pinus Banksiana has a smooth bark offering no shelter to 

 the pest, and remains uninfected where Scotch pines succumb, 

 and hence the change to this exotic species is recommended. 



Aradus cinnamoneus Panz., die Kiefernrindenwanze. Zeitschrift fiir 

 Forst-und Jagdwesen, September, 1905, pp. 567-576. 



The White Pine plantations in the Jura 

 Fungus Disease mountains, where this species thrives in 

 of spite of wintersnows and frost, have during 



White Pine the last year and one-half suffered from a 



bark-rust-fungus, Cronartiiun ribicolum, 

 which so far has not been reported from the United States, al- 

 though in Germany it was described by R. Hartig as long ago as 

 1874. It appears that Ribes species are the intermediate host. 

 A description by v. Tubeuf is given. The plants, even vigorous 

 6 to 7 year old ones, become yellow and finallj^ top dry, or die en- 

 tirely, and must be removed to avoid spreading the trouble. 



\^This is an important discovery for us, pointing out the need of 

 careful inspection of imported material ! ] 



Ein neuer Feind unscfer Wevmuthskiefernku'turen. Schweizerische 

 Zeitschrift fiir Forstwesen, Feb., 1906., pp. 46-48. 



The blight {Schidte) of seedling and thicket 

 Seedling growth of pine and spruce is now pretty 



Blight. generally recognized as a fungus disease, 



distinct, at least in plants more than a year 

 old, from "damping off." I^ike bacterial diseases in human com- 

 munities attacks are warded off by such cultural methods as fur- 

 ther the development of vigorous plants, while crowded stands, 

 stunted in their struggle for light, water, and soil fertility, offer 

 an opportunity for the most rapid development and the widest 

 spread of the pest in its most virulent form. Where fear of 

 blight is entertained planting is to be preferred to sowing, and 

 sowing, where necessitated, should be spar.se and on well prepared 

 ground. 



