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



1333. Patton, R. T. Timber production and growth curves in the mountain ash (Eucalyp- 

 tus regnans). Proc. Roy. Soc. Victoria (N. SO^O 1 : 1-3. PI. 1-2, fig. 1-4. 1917. [Received 

 1919.]— See Bot, Absts. 4, Entry 456. 



1334. Pethybridge, G. H. Notes on some saprophytic species of fungi, associated with 

 diseased potato plants and tubers. Trans. British My col. Soc. 6: 104-120. PL 3, 4. 1919.— 

 See Bot. Absts. 4, Entry 1152. 



1335. Pethybridge, G. H., and H. A. Lafferty. A disease of tomato and other plants 

 caused by a new species of Phytophthora. Sci. Proc. Roy. Dublin Soc. 15:487-503. 3 pi. 

 1919. — A disease causing a rot of the root system and lower portion of the stem of young to- 

 mato plants is described and named "Tomato-foot Rot." A species of Phytophthora, isolated 

 from the diseased tissues, was proved to be the cause of the disease. The fungus, grown in 

 pure cultures, was found not to be identical with any of the previously described members of 

 the genus Phytophthora. It was given the name P. cryptogea. Petunia is reported as a 

 natural host for this parasite and Aster and Cheiranthusare also suspected. Artificial inocula- 

 tions show the fungus also to be pathogenic to the potato, to Gilia tricolor and Fagus sylvatica 

 but not to Senecio vulgaris, Hclianthus annuus or Nicotiana affinis. The disease was found to 

 be contracted from the soil. It can be prevented by raising tomato plants in soil thoroughly 

 sterilized by heat. — A. E. Waller. 



1336. Pethybridge, George H., and H. A. Lafferty. A disease of flax seedlings caused 

 by a species of Colletotrichum and transmitted by infected seed. Sci. Proc. Roy. Dublin Soc. 

 15: 359-384. 2 pi. 1918. — A fungus causing a "damping off" disease of flax seedlings (Linum 

 usitaiissimum) is described as a new species under the name Colletotrichum linicolum.. Flax 

 seed from Russia, Holland, Canada, the United States and Japan has been found to give 

 rise to diseased seedlings and it is believed that the disease is widespread over the globe. — 

 A. E. Waller. 



1337. Putterill, Victor Armsby. Notes on the morphology and life history of Uromyces 

 Aloes Cke. South African Jour. Sci. 15: 656-662. PL 22-23, fig. 1-6. 1919.— See Bot. Absts. 

 4, Entry 1153. 



1338. Ramsey, Glen B. Studies on the viability of the potato blackleg organism. Phyto- 

 path. 9: 285-288. 1919. — The author concludes that the blackleg organism (Bacillus atrosep- 

 ticus) does not live in tubers that may overwinter in the soil and that there is little chance 

 that uninjured plants will contract the disease even though the causal organism is washed 

 about the stem and root system. — H. H. McKinney. 



1339. Ravn, F. Kolpin, J. Lind, C. Ferdinandsen, and Sofie Rostrtjp. Versigt over 

 Havebrugzstanternes Sygdomme i 1916 og 1917. [Survey of diseases of horticultural plants 

 during 1916 and 1917.] Tidsskr. Landbrug. Planteavl 26:298-334. 1919.— Discusses the 

 plant disease situation in Denmark during 1916 and 1917. Diseases due to insects, bacteria 

 and fungi are considered. — Albert A. Hansen. 



1340. Regnier, Robert. Sur le chancre bacterien du peuplier (Micrococcus Populi). 

 [Bacterial canker of poplar.] Compt, Rend. Acad. Sci. Paris 169: 85-88. July 15, 1919.— Ob- 

 servations commenced in 1913 are reported upon a canker of Carolina poplar which is com- 

 mon in the valley of the Oise, France, and which is attributed from the work of Delacroix to a 

 micrococcus. Without advancing further evidence in regard to causation, the writer, from 

 observations in nature, records stages in canker formation and the possibility of insect trans- 

 ference. The severity of the disease makes this disease of parallel importance to that caused 

 by Dothiciza populea. Control measures are suggested. — G. H. Coons. 



1341. Roberts, R. H. "Crinkle" on Northwestern Greening. Phytopath. 9: 261-263. 

 PL 16-17. 1919. — "Crinkle" on Northwestern Greening in 1918 is reported as being a trouble 

 unusual in Wisconsin orchards. The injury is described briefly in relation to its possible 



