EXPERIMENT STATION RECORD. 745 



DISEASES OF PLANTS. 



The enemies of cultivated plants, (i. Tuui-faut {Lcs Ennemis des Plantes 

 Cultiv6es. Paris, 1912, pp. 565, pis. 55, figs. 374). — In this bqok the author 

 describes the principal fungus and insect pests of plants. By means of a sys- 

 tem of Iceys it is possible to recognize any pest. The keys are grouped under 

 an alphabetical arrangement of the host plants, and the different parasites by 

 their sequence of families. Chapters are given on methods of treatment for the 

 prevention of attack, these including the use of fungicides and insecticides, 

 natural methods of repression, etc. Formulas are given for the preparation of 

 the dirierent mixtures, and methods for their proper application are indicated. 



Mildews, rusts, and smuts, G. and Ivy Massee {London, 191S, pp. 229, 

 pis. 5). — In this book the authors describe the mildews, rusts, and smuts occur- 

 ing In Great Britain, and in addition they have included a number of species 

 not yet been definitely reported in Great Britain, but parasitic on host plants 

 indigenous to the country and also those parasitic on cultivated plants. After 

 an inti'o<luction on the nature of the fungi, they consider the general character- 

 istics of the different families, their relationship, the method by which fungi 

 gain entrance into the host plant, etc., and give keys to the genera and species 

 of the families Peronosporaceae, Erysiphaceaj, Perisporiacea?, Uredinaceie, and 

 Ustilagiuacese. 



The British rust fungi, W. B. Grove {Cambridge, 1913, pp. XlI-\-J,l2, figs. 

 290). — The author presents a systematic study of the rust fungi of Great 

 Britain, more than 250 species being included. The life history of Puccinia 

 caricis is described at length as an illustration of the complexity of the group, 

 after which chapters are given discussing the sexuality of the Uredinales, alter- 

 nate generations, spore forms, grouping according to spore forms, etc. The 

 life histories of a number of other species are described, among them P. grani- 

 inis, P. poarum, P. malvacearum, Gymnosporangium clavariwforme, Endophyl- 

 lum scmpcrvivi, Cronartium rihicola, Mclampsora pinitorqua, and Calyptospora 

 goeppertiana, which represent the principal types of rust. An extended discus- 

 sion of specialization and immunity is also given. 



The principal portion of the work is taken up with the systematic treatment 

 of the rusts. A considerable number of forms that are closely allied are 

 grouped together, the author not believing in segregating species on wholly 

 biological differences. 



Notes on Uredinopsis mirabilis and other rusts, W. P. Fraser {Mycologia, 

 6 {1914), No. 1, pp. 25-28). — The author reports that five sowings of teliospores 

 of U. mirahilis from Onoclea sensihilis on Ahies halsamea were succe.ssful, as 

 were also three sowings of aeciospores on O. sensihilis, but infection failed 

 with Osmunda claytoniana, 0. regalis, Aspidium thclypteris, Asplcnium filix- 

 femina, and Phcgopteris dryopteris. Teliospores of Melampsora mcdusw from 

 Populus grandidcntata infected Tsiiga canadensis, but not Larix laricina. Tel- 

 iospores of Piicciniastrum myrtilH from Gaylussacia resinosa infected T. cana- 

 densis. Teliospores of Calyptospora colnmnaris from Vaccinium pennsylvani- 

 cum infected Abies balsamea. Peridermiurn harknessii failed to infect Com- 

 mandra umbcllata. 



Two parasitic plants, Kranzlin {Pfianzer, 9 {1913), No. 11, pp. 556-56S, 

 pis. 3). — This includes a description and brief account of the habits and rela- 

 tions of Gassy tha filiformis, also of a Loranthus showing close affinities with 

 L. drcgci. Removal of plants or parts attacked by these parasites is the only 

 remedy suggested. 



Plus and minus strains in the genus Glomerella, C. W. Edgerton {Abs. in 

 Science, n. ser., 39 {1914), No. 998, p. 258).— In a previous publication (E. S. R., 



