198 PATHOLOGY [Bot. Absts., Vol. IV, 



1303. Hohnel, Franz V. Fragmente zur Mykologie XX. Mitteilung Nr. 1031-1057. 

 [Mycological fragments XX. 1031-1057.[ Sitzungsber. K. Akad. Wiss. Wien (Math.-Nat, Kl.) 

 126:353-399. Fig. 1. 1917.— See Bot. Absts. 4, Entry 1112. 



1304. Hunt, Chas. M. Citrus scab: cause and cure. Florida Grower 20:8. Nov. 8, 

 1919. — Brief description of the disease with recommendations for control by spraying is 

 given. — H. R. Fulton. 



1305. Jackson, V. W. Rusts and smuts of grain crops. Manitoba Farmers' Library 

 Ext. Bull. 44. 55 p. 25 fig. Nov., 1919. — In a popular bulletin discussing grain diseases, es- 

 pecially Black Stem Rust ( Puccinia gra?ni?ris) and cereal smuts, the writer records the numbers 

 of Berberis vulgaris found to date in Manitoba and states that none occur wild. Germination 

 of urediniospores of P. graininis from Hordeum jubatum was obtained weekly from October 

 15 to March 15 — "after which time it is difficult to find spores orto get viable ones." The 

 writer concludes that urediniospores continue on wild barley until the next wheat crop. A 

 diagram showing dates of appearance of black stem rust in various parts of Manitoba is 

 given for the year 1916. — Data on seed injury by formaldehyde and copper sulphate are given. 

 — G. II. Coons. 



1306. Jehle, R. A., J. W. Goodman, and J. W. Lindley. Control of late blight of toma- 

 toes (Phytophthora infestans) in the Blue Ridge Mountains. Bull. North Carolina Dept. 

 Agric. 40 u : 3-16. 7 fig. 1919. — This paper is a report of cooperative experiments conducted 

 in western North Carolina on the control of late blight of tomatoes. This disease is very 

 destructive in sections whose altitude ranges from 3500 to 4500 feet, but was very successfully 

 controlled by spraying with 5-5-50 Bordeaux mixture. At lower altitudes, where Septoria 

 leaf spot (S. lycopersici) was present, the use of resin-fish-oil soap Bordeaux gave better 

 control than did Bordeaux alone. — F. A. Wolf. 



1307. Johnston, J. R. Diseases of sugar-cane in tropical and subtropical America, espe- 

 cially the West Indies. West Indian Bull. 16:275-308. PI. 1-7. 1918.— Descriptions and 

 illustrations of common fungus diseases of sugar cane in America. A bibliography i? 

 appended. — C. V. Piper. 



1308. Jones, L. R., and H. H. McKinney. The influence of soil temperature on potato 

 scab. Phytopath. 9:301-302. 1919. — High soil temperatures are shown to be favorable to 

 the development of potato scab due to the parasite Actinomyces scabies. Experimental 

 results harmonize with observations in Europe and the United States. — R. E. Vaughan. 



1309. Kino, A. M. Notes on the genus Balansia. South African Jour. Sci. 15: 670-673. 

 PI. 25, fig. 1-4. 1919.— See Bot, Absts. 4, Entry 1116. 



1310. Lagerberg, Ivar. Vergleichende Untersuchungen iiber die Widerstandsfahigkeit 

 der Sporen und der vegetativen Formen einiger sporenbildender Bakterien gegeniiber ultra- 

 violett Licht. IV. Mitteilung iiber die Wirkung der ultravioletten Strahlen. [Comparative 

 studies of the resistance of spores and vegetative forms of spore-forming bacteria to ultra-violet 

 light. IV. On the action of ultra-violet rays.] Zeitschr. Immunitatsforsch. u. Exp. Therapie 

 28: 186-197. 1919.— See Bot. Absts. 4, Entry 1598. 



1311. Lamkey, E. M. R. A consideration of yellows. Proc. Amer. Carnation Soc. 26: 

 25-35. 1917. — "Yellows," which appears as a mottled chlorosis of the leaf, is said to be a 

 physiological trouble. A study of the internal structure and physiological processes of dis- 

 eased plants shows the stomata to be closed, a reduction in quality or quantity of diastase 

 resulting in starch accumulation, and an excessive production of oxidase which interferes 

 with certain physiological functions. A temperature or other environmental relation is sug- 

 gested by the fact that a diseased plant seems to recover, at least for a time, in the field. 

 Badly yellowed cuttings give yellowed plants, while supposedly healthy cuttings give a few 

 diseased plants. The disease appears to be of an infectious, but not contagious, nature. — 

 L. M. Massey. 



