1019] DISEASES OF PLANTS. 155 



Celery late blight was satisfactorily controlled by Bordeaux mixture, but 

 not by Bulfoclde. Bordeaux mixture was shown by experiments continued 

 during five yean to be entirely safe when made up in accordance with the 



4:4:40 formula, starting when the plants are in the seed bed and spraying at 

 intervals of ten days or two weeks throughout the growing season. Studies on 

 the carrying over of the blight in the seed gave negative results. 



Oat smut experiments carried on for two years indicate that the sprinkling 

 method of employing formalin can be successfully practiced. Directions and 

 precautions for such use of formalin are outlined. 



Experiments on the cause and control of a disease of winter tomatoes have 

 been carried on for three years, the results giving promise that the disease 

 may be held in check by the application of such fertilizers as acid phosphate 

 and bone flour. Control of snapdragon rust involves destruction of all diseased 

 plants, watering the plants only from below in the greenhouse, dusting the 

 plants thoroughly every ten days with finely powdered sulphur or spraying with 

 lime-sulphur 1:35, growing plants from seed, and exclusion of all imported 

 potted plants or cuttings. Inspection of white pines for blister rust showed 

 forty infections on six pines, but no rust on either wild or cultivated Ribes. 



Diseases of economic plants, W. Noweix (West Indian Bui., 16 (1918), No. 

 4, pp. .109, 310, 322-327, 330, SSI).— These portions of a report (which also in- 

 cludes insect pests and data on soil, climatic, and other conditions) deal with 

 sugar cane root disease (Marasmius sacchari) and rind fungus (Melanconiutn 

 sacchari) ; cotton leaf mildew, bacterial boll disease, angular leaf spot, black 

 arm, internal boll disease, and boll soft rot (Pkytophthora sp.) ; cacao root 

 disease (Rosellinia pepo), canker and black rot of pods (P. faberi), brown rot 

 of pods and dieback and stem disease (Lasiodiplodia theobromw), and pink 

 disease (Corticium salwonicolor) ; citrus black root disease (R. pepo and 

 R. bunodes), red root disease (Sphwrostilbe sp.), pink disease, crown rot, 

 collar gumming, and dieback; coconut bud rot and root disease; maize rust, 

 smut, and root and seedling diseases; peanut leaf rust (Urcdo arachidis) ; 

 onion bacterial rot; a rubber disease due to Rosellinia sp. ; and phanerogamic 

 parasites (dodder and mistletoe) attacking various plants. 



Parasitic fungi collected in the Government of Podolia, Russia, L. Gar- 

 bowski i Bui. Trimest. Soc. Mycol. France, 33 (1918), Xo. 8-4, pp. 73-91; abs. in 

 Internat. fnst. Agr. [Rome], Internal Rev. Soi. and Praet. Agr., 9 (1918), Xo. 

 8, p. S9i).—A list of parasites, with their respective hosts, collected in the 

 Government of Podolia, Russia, during 1915 comprises 121 fungi. Of 

 these several are named and described as new species, among them Fusariella 

 popuH on Populus tremula and Macros porium somnifcri on Papaver sonini- 

 ferum. 



Mycological notices, T. Lindkors (Srcnsk Rot. Tidskr., 12 (1918). Xn. 2. pp. 

 221-221, figs. 4). — The author supports the claim that C(coma interstitiale and 

 Puccinia peckiana are developmental forms of the same fungus. He also de- 

 scribes as new species Protomyces sotichi on Sonchtis oleraceus, P. kemneri on 

 Orobus iubcrosus, and Hclminthosporium acrothccioidcs on Hordeum vulgare. 



Carduaceous species of Puccinia. — I, Species occurring on the tribe Ver- 

 nonise. II. S. Jackson {Bob Gaz., 65 (1918), No. 4. pp. 289-312).— This is the 

 first of a proposed series of papers dealing with the species of Puccinia found 

 on the members of the tribe Vernonia?. Of these three are noted in this con- 

 nection, Piptocarpha and Elephantopus harboring 2 species each, and Ver- 

 nonia 25 species, some of which are new or newly named. 



.fficial stage of Puccinia oxalidis, W. H. Long and R. M. Harsch (Bat. Gaz., 

 65 (1918), Xo. 5, pp. 475-478). — The authors report studies made during 1915 

 and 1916 on an ^cidium first found on leaves of Bcrberis repens. This is said 



