176 PATHOLOGY [BoT. Absts., Vol. VII, 



1182. Dickson, B. T. Some plant diseases in the greenhouse. Ann. Rept. Quebec See. 

 Protection of Plants 12 : 46-48. 1920. — A brief account of the most important plant pathogenes 

 occurring in the greenhouses at Macdonald College, Quebec, Canada. Those discussed were: 

 Uromyces carophyllinus on carnation, Puccinia anlirrhini on snapdragon, Microsphaera alni 

 on sweet pea, Alternaria violae on violet, Cladosporium fulviim on tomato. Mosaic of tomato 

 and a mosaic-like affection of Cineraria were also considered. — B. T. Dickson. 



1183. Eastham, J. W. Notes on potato diseases. Agric. Jour. [British Columbia] 5: 210. 

 1920. 



1184. Eastham, J. W. Bitter-Pit or Baldwin Spot. Agric. Jour. [British Columbia] 4: 

 292. 1919. 



1185. Eastham, J. W. Guard against Apple Powdery Mildew. Agric. Jour. [British 

 Columbia] 4: 44. 1919. 



1186. Fischer, W. Die Brennfleckenkrankheit der Bohnen. [The anthracnose of beans.] 

 Fuhlings Landw. Zeitung. 68:241-259. 1919. — A popular review of the literature of the 

 anthracnose of beans caused by Gloeosporium lindernuthianum, covering its nature, conditions 

 of infection and development, and various methods of treatment. The author also discusses 

 some experiments conducted by himself and others at Bromberg in 1915 and 1916, in which 

 seed from apparently disease-free plants in rows in which diseased seed had been inter- 

 spersed was selected for planting the following year to see if immune plants could be found. 

 The result was 23 per cent infected plants as against 63 per cent infected plants in rows 

 planted from infected plants of the year before. In 1917 and 1918 tests of selections of dis- 

 ease-free seed from apparently disease-free plants were made on a field which had never 

 grown beans and was located far from the previous trial grounds. There was considerable 

 reduction in disease but still as much as 20 per cent, with an average of 8.2 per cent. This 

 method of getting rid of the disease is not regarded as very promising. The selection of 

 disease-free seed from immune plants in badly diseased fields seems more promising. It is 

 suggested that crossing of different species of beans or beans with related plants may be 

 worth trying; to support this suggestion, attention is called to the observations of several 

 investigators who found that species differed in susceptibility to the disease. — A. T. Wiancko. 



1187. Hemmi, Takewo. Kurze Mitteilung iiber drei Falle von Anthraknose auf Pflanzen. 

 [Short report on three cases of anthracnose of plants.] Ann. Phytopath. Soc. Japan 1': 13-21. 

 PI. 1, 5 fig. 1920.— Anthracnoses of Mahonia japonica (Thumb.) DC, Linum usitatissimum 

 L., and Illicium anisahim L.. occurring in Japan, are briefly discussed. The cause of the 

 leaf spot of Mahonia was found to be a new species of Colletotrichum, the author giving it the 

 name Gloeosporium (Colletotrichum) japonicum. The pathogene attacking stems and cotyle- 

 dons of flax is identical with Colletotrichum. linicolum described by Pethybridge and Laf- 

 PERTY. The leaf spot of Illicium is caused by a new species, Gloesporium Illicii H. Symp- 

 toms of the three diseases and technical descriptions of the two new species are given. — 

 L. M. Massey. 



1188. HiLEY, W. E. The fungal diseases of the common larch. XI + 204 p., 73 fig. 

 Clarendon Press: Oxford, 1919. — This book opens with a description of the general anatomy 

 of the larch, in which the author defines technical terms which he uses later. The discussion 

 falls under 4 heads: (1) larch canker, Dasyscypha calycina; (2) Fomes annosus, and other less 

 important heart-rotting fungi; (3) Armillaria mellea; (4) leaf and seedling diseases. Ap- 

 proximately 150 pages are given to the discussion of Dasyscypha calycina, Fomes annosus, and 

 Armillaria mellea. Other heart-rotting fungi — e.g., Polyporus schweinitzii, Poria vaporaria, 

 Polyporus sulphiireus, and Trametes pini — are less important than Fomes annosus on larch. 

 The leaf and seedling diseases are not important except under unfavorable conditions, or in 

 nurseries where alternate hosts of the needle rusts are not excluded. The author describes the 

 injury resulting from attack by a given fungus, the relations of host and parasite, the fungus 



