No. 1, October, 1920] PATHOLOGY 35 



245. Lee, H. Atherton. Behavior of the citrus-canker organism in the soil. Jour. Agric. 

 Res. 19: 189-205. PL 36-37. I920.—Paeudomonaa citri multiplies in sterilized .soil Imt in 

 competition with the usual soil organisms in tubes or boxes commonly <loes not persist for 

 more than 6 days. Its survival is even shorter in the soil of the orchard. — Cankers were pro- 

 duced in mature wood and in roots of citrus. The organism may persisl for a long time in 

 cankers on roots, buried wood and leaves. — D. Reddick. 



246. Mitchell, D. T. Poisoning of cattle by feeding on old mealie lands. Jour. Dept. 

 Agric. Union of South Africa 1: 138-143. 1920. — The feeding of oxen with cobs infected with 

 Diplodia zeae produced in experimental animals a condil inn which was indistinguishable from 

 that occurring in animals which gained access to old mealie lands, and a similar condition could 

 be set up by feeding on a culture of Diplodia zeae grown on sterile maize. The intensity of 

 the symptoms and the mortality depend upon the quantity fed and on the percentage of infec- 

 tion present in the grain. Cultures of allied species of fungi grown on maize are incapable 

 of setting up similar clinical symptoms. The causal factor is not the fungus itself, but must 

 be looked for in the material which is formed as a result of the interaction of Diplodia zeae, 

 during its development, with the starchy content of the maize grains. — E. M. Doidge. 



247. Newell, Wilmon. Citrus canker eradication. Report of the Plant Commissioner 

 for the biennium ending April 30, 1918. Florida State Plant Bd. Quart, Bull. 3 : 36-44. 1919. 

 — An account is given of citrus-canker (Pseudomonas citri) eradication work during 1917 

 and 1918, with tables and charts showing the scope, progress and expenditures of the work. — 

 C. D. Sherbakoff. 



248. Newell, Wilmon. Report of the Plant Commissioner for the biennium ending 

 April 30, 1918. Florida State Plant Bd. Quart. Bull. 3 : 82-85. 1919.— A brief report on the 

 work of R. A. Jehle with citrus canker (Pseudomonas citri) at Redland, Dade County, Florida. 

 In this work, by inoculation experiment, it was found that of many hosts tried only "wild 

 lime" (Zanthoxylwn fagara) is susceptible to the disease. The work showed also that of the 

 many methods suggested by various parties for citrus-canker control none but prompt and 

 complete destruction of the infected trees, coupled with rigid disinfecting measures, is of any 

 value. — C. D. Sherbakoff. 



249. Peglion, Vittorio. Intorno al comportamento di alcune varieta di frumento rispetto 

 alia carie. [Behavior of wheat varieties with respect to bunt.] Atti. R. Accad. Lincei [Roma] 

 Rend. (CI. Sci. Fis. Mat. e Nat.) 28 2 : 398-400. 1919.— Fields of wheat in some localities were 

 found affected with Tilletia caries (D.C.) Tul., others with T. laevis Kiihn and others with 

 both. In infection tests with different wheat varieties, the percentage of spikes affected 

 varied from 33.6 per cent (Cologna variety) to 74.1 per cent (Romanello variety). — F. M. 

 Blodgett. 



250. Pole-Evans, I. B. Report on cold storage conditions for export fruit at Capetown. 

 Union of South Africa Dept. Agric. Ann. Rept. 1918: 1-8. 8 fig. 1919.— This is a report on 

 the occurrence of Penicillium expansum, P. digitatum, and P. italicum in cold storage cham- 

 bers at Capetown and on steam-boats. — E. M. Doidge. 



251. Potterill, V. A. A new apple tree canker. South African Jour. Sci. 16: 256-271. 

 PI. 21-30. 6 fig. 1919. — A fungus belonging to the genus Botryosphaeria has been found to 

 be the cause of a rather serious canker of apple trees at the Vereeniging Estates. An account 

 is given of its morphology and its salient cultural characters, and of a number of inoculation 

 experiments which were carried out. The characters of the fungus are compared with those 

 of Physalospora cydoniae, the cause of the New York apple-tree canker from which it is con- 

 sidered to be distinct. The fungus is described as a new species, Botryosphaeria mali 

 Putterill— E. M. Doidge. 



252. Roberts, Herbert F. Yellow-berry in hard winter wheat. Jour. Agric. Res. 18: 

 155-169. 1919.— See Bot. Absts. 6, Entry 32. 



