No. 2, September, 1920] PATHOLOGY 273 



according to the author, is conveyed to the flower at the time of flowering. The causal organ- 

 ism is carefully described and studied in its natural and cultural environments. Il is found 

 that the optimum temperature lies between 14°C. and 16°C, while a temperature of 10°C. 

 below 0°C. is not injurious to the organism, although growth is checked during the time of 

 exposure. Higher temperatures than t lie opl inium bring about a luxuriant growth which does 

 not last more than a very few days. On relat ively dry media there is the formation of sclerotio 

 tissues that are considered by the author as the adaptations for the t iding over of dry periods 

 rather than cold periods. Microscopically the fungus causing the rot resembles closely the 

 one described by Peglion and by Bainier and with a few differences of a minor importance the 

 incomplete descriptions of the above authors are suited for the description of the present form. 

 Systematically the causal organism has been placed in a newly formed genus under the name 

 Rhacodiclla castaneae (Banier) Peyronel. Asphyxiation of the fungus which is an obligate 

 aerobe, by means of CCVor simple soaking in water for a few days, may prove beneficial if 

 care is then taken to spread the chestnuts to dry in a thin layer in a cool and dry place. Sul- 

 phur fumigation was of no avail in the treatment of the fruit. Infected chestnuts being of 

 less specific gravity allows separation from sound nuts by flotation methods. — A. Bonazzi. 



2054. Pridham, J. T. An obscure disease in wheat. Agric. Gaz. New South Wales 31: 

 229-231. 2 fig. 1920. — A non-technical description of a wheat trouble is given. Abnormal 

 conditions appear at heading time. Heads have a faded dull appearance, are constricted, and 

 contain shrunken grain. The characters of the disease do not indicate take-all, Ophiobob/s 

 graminis. Disease not amenable to seed treatments used. Disease has been noticed at points 

 in New South Wales since 1911 but nearly absent several years. — L. R. Waldron. 



2055. Rambousek. Uber die praktische Anwendung des Sulfins gegen Schimrnelpilze 

 und Schadlinge. [On the applicability of Sulfin for fungous diseases and insect pests.] Zeit- 

 schr. Zuckerind. Bohmen 42 : 649. 191S. — Sulfin is a new proprietary powder containing sodium 

 bisulfate and gypsum. Results secured thus far are satisfactory and the material is worthy 

 of further test. [Through abstract by Matouschek in Zeitschr. Pflanzenkr. 29:2S0. 1919 

 (1920).]— D. Reddick. 



2086. Ravaz, L. Traitement de l'Anthracnose. [Control of the anthracnose.] Prog. 

 Agric. et Vitic. 74: 103-104. 1920. 



2087. Reinking, Otto A. Phytophthora Faberi Maubl.: The cause of coconut bud rot in 

 the Philippines. Philippine Jour. Sci. 14: 131-151. 3 pi. 1919. — The history, distribution, 

 and nature of the disease are outlined, followed by detailed description of field and laboratory 

 studies of the disease. The indications pointed to bacterial agency and an organism resem- 

 bling Bacillus coli was isolated. Inoculations with pure cultures of Bacillus coli produced 

 many symptoms of the disease. Bacterial causation, however, was deemed insufficient to 

 account for the rapid dissemination. Trees inoculated with Phytophthera isolated from 

 Cacao proved positive in a large percentage of cases. Later the same f ir.^us was isolated 

 from the woody tissue of the coconut and reinfections proved it to be the cause of bud rot. 

 A taxonomic study revealed the presence of several species of the fungus. Methods of treat- 

 ment recommended and a bibliography is appended. — Albert R. Swcctser. 



2088. Rosen, H. R. The mosaic disease of sweet potatoes. Arkansas Agric. Exp. Sta. 

 Bull. 167. 16 p., 5 pi. 1920. — The mosaic disease of sweet potatoes was first identified by the 

 author in 1918 and has since been the subject of study. Isolation and infectivity studies have 

 been carried on, so far with negative results. The disease is classified as a non-infectious, 

 heritable chlorosis. The appearance of the disease is described and illustrated. Roguing 

 diseased plants is recommended as a control for the disease. — John A. Elliott. 



2089. Salmon, S. C. Establishing kanred wheat in Kansas. Kansas Agric. Exp. Sta. 

 Circ. 74. 16 p. 1919.— See Bot. Absts. 5, Entry 1205. 



