No. 2, June, 1921] PATHOLOGY 203 



fied as Rhizoctonia violacea. It is commonly known to attack the roots of various garden 

 plants, such as clover, lucern, beets, etc., and has been known to attack young larch trees. 

 This is the first known attack on spruce. It manifests itself as a dense violet fungus cover- 

 ing on the roots and root collar, which in part peels off as layers, in part adheres firmly. 

 Attacked plants should be immediately removed and the soil strewn over with quicklime and 

 turned under. — J. Roeser. 



1403. QuANJER, H. M. The mosaic disease of the Solanaceae, its relations to the phloem- 

 necrosis and its effect upon potato culture. Phytopath. 10: 35-37. H fig. 1920. — Field and 

 greenhouse experiments conducted for a number of years show the mosaic on tobacco, tomato, 

 and potato to be of a similar nature. The mosaic symptoms on the potato become evident 

 the season after infection. Grafting experiments demonstrate the contagious nature of the 

 disease. The experiments indicate that transmission under field conditions is usually through 

 root contact. The author suggests that the disease may be due to a virus but more probably 

 to an ultramicroscopic parasite. — R. E. Vaughan. 



1404. Roberts, John W. The apple-blotch and bitter-rot cankers. Phytopath. 10: 353. 

 1920. — The apple-blotch canker caused by Phyllosticta solitaria and the bitter-rot canker 

 caused by Glomerella cingidata are discussed from the standpoint of their relation to the 

 host. — A. J. Riker. 



1405. RosENBAUM, J. A Macrosporium foot-rot of tomato. Phytopath. 10:415-422. 

 4fi^g. 1920. — The fungus, found in Delaware fields and causing a rot at the base of tomato 

 stems, resembles the parasite (M. solani) causing the early blight of potato. The pathogen- 

 icity of the organism was established. The fungus differs in cultural and morphological 

 characters from the Macrosporium causing the nail-head spots on ripe tomato fruit. — R. E. 

 Vaughan. 



1406. Sedlaczek. [Rev. of: Xeoer, F. W. Die Kranklieiten unserer Waldbaume und 

 wichtigsten Gartengeholze. (Diseases of our forest trees and most important ornamentals.) 

 via + 286 p., 23J^ fig. Ferdinand Enke: Stuttgart, 1919 (see Bot. Absts. 6, Entry 1280).] 

 Oesterreich. Forts- u. Jagdzeitg. 38: 37-38. 1920. — This book is similar in compass and 

 arrangement to Hartig's "Diseases of Trees," but brought up to date. It consists of 2 

 parts — non-parasitic diseases and diseases caused by parasitic plants. — F. S. Baker. 



1407. Smiley, Edwina M. The Phjdlosticta blight of snapdragon. Phytopath. 10: 

 232-248. 8 fig. 1920. — Antirrhinum majus is the only host known to be affected by Phyllo- 

 sticta antirrhini. Symptoips, etiology, and pathological effects of the disease are discussed. — 

 Ruth G. Bitterman. 



1408. Tubeuf, C. von. Rhizoctonia violacea an Fichten. [Rhizoctonia violacea on Nor- 

 way spruce (Picea excelsa).] Naturw. Zeitschr. Forst- u. Landw. 18:233-234. 1920. — 

 Tubeuf refers to an article by Merker (see Bot. Absts. 8, Entry 1402), and calls attention to 

 the fact that Hartig reported this fungus as attacking young spruce. Past experiments to 

 produce the perithecium of the fungus were failures, and the experiments, in general, were 

 superficial. Tests by the author of imported, infected plants in 1919 and 1920 planted with 

 healthy stock, resulted in a full recovery of the diseased stock and no attack on the other. — 

 J. Roeser. 



1409. Wolf, F. A. Bacterial blight of the soybean. Phytopath. 10: 119. 5 fig. 

 1920. — The author describes a disease of soybeans occurring in North Carolina caused by 

 Bacterium soyae n. sp. Symptoms of the disease and cultural character of the causal organ- 

 ism differ from those described by F. Coerper. No difference in varietal susceptibility 

 was noted. The organism is believed to be seed borne. — William B. Tisdale. 



1410. Wolf, F. A. A little known vetch disease. Jour. Elisha Mitchell Sci. Soc. 36: 

 72-85. PI. 2-6. 1920. — A report on an important disease caused by Protocoronospora nigri- 



