DISEASES OF PLANTS. 545 



Peach scab, plum rust, Rhizoctonia, tip bum, wilt, and hollow heart of 

 potatoes are also briefly noted. 



Report of the botanist and mycologist, T. Petch (Rpt. Dept. Agr. Ceylon, 

 1912-13, pp. C7-C9). — This report includes the mention of Hevea canker 

 (Phytophthora faberi), gray blight {Pestalozzia palmarum), and bird's eye 

 spot {Cercospora thece) of tea; a disease of stored coconuts, one of plantains, 

 and one of indigo; Rosellinia hothrina attacking camphor, also this tea root 

 disease and another, Poria hypolatcritia, attacking Tcphrosia Candida ; a fungus 

 disease of mangosteens; bacterial wilt of tomato; two stem diseases, a root 

 disease, a fruit rot, and two leaf diseases, Melampsorella ricini and Cerco- 

 sporina ricinella, of castor oil plant; Erysiplic polygona on peas; a Nectria 

 stem canker of Acacia decurrens; Phragmidium disciflorum on rose; Plasmo- 

 para viticola on grape; Cladosporium on sorghum; and a Merulius dry rot on 

 wattle in walls of bungalows. 



A list of recent publications is given, as is also a brief account of recent 

 botanical work done by the staff of the herbarium. 



Notes upon Washington fungi, J. G. Hall {Phytopathology, 5 (1915), No. 1, 

 pp. 55-58, pis. 2). — From a study of Coryneum-like structures on apple and 

 Sambucus, the author is convinced of their identity. INIaterial submitted to Dr. 

 Roland Thaxter resulted in the identification of the fungus as Hendersonia 

 diplodioides. In connection with this fungus the author reports an ascosporic 

 stage which is considered to be Otthia arnica. 



Two new species of fungi are described, Neottiospora yuccwafolia on withered 

 or dying Yucca leaves and Tureenia juncoidea on dead culms of Juucus, 



The temperature relations of some fungi causing storage rots, Adeline 

 Ames {Phytopathology, 5 {1915), No. 1, pp. 11-19). — The author has made a 

 study of the thermal relations of some of the fungi causing storage rots, those 

 selected for the investigation being Glomerella rufomaculans and Cephalo- 

 thecium roseum from apples, Thielaviopsis paradoxa from pineapple, Penicil- 

 lium digitatum from orange, Bhizopus nigricans from sweet potato, and 

 Monilia fructigena from plums. 



The results obtained show that Monilia and Penicillium germinate at 0° C, 

 but growth is very slow. The other fungi do not develop below 5°', but if 

 growth is started at a higher temperature it can continue at this temi>erature. 

 Aside from Rhizopus none of the organisms were able to germinate above 36°. 

 The optimum temperature of growth for Monilia and Penicillium is 25°, Thie- 

 laviopsis, Glomerella, and Cephalothecium 30°, and Rhizopus 36°. The thermal 

 death point of Rhizopus is 60°, of Penicillium 58°, and of the remaining fungi 

 between 51° and 53°, 



The results indicate that in refrigerating experiments, temperatures as near 

 zero as possible must be maintained if the development of rot producing fungi 

 is to be entirely avoided. 



Further studies on the specialization of Uromyces caryophyllinus, E. 

 Fischer {Mycol. Centhl., 3 {1913), No. 4, pp. 1^5-149). — The author reports his 

 recent experimentation, held to show that U. caryophyllinus from the canton 

 of Valais is capable of infecting Saponaria ocymoides as well as Tunica 

 prolifcra. Previously it was found (E. S. R., 28, p. 149) that U. caryophyllinus 

 from the vicinity of Heidelberg lived only on T. prolifera, and only in excep- 

 tional cases passed over to S. ocymoides. 



It is concluded that the specialization of this fungus is not the same in Valais 

 as in Baden. 



The specialization of Puccinia Pulsatillas, E. Fischer {Mycol. Centhl., 3 

 {1913), No. 5, pp. 214-220). — In experiments testing the capability for infection 

 by teleutosijores of P. pulsatillw developed on Anemone montana, more or less 



