740 EXPERIMENT STATION RECORD. 



DISEASES OF PLANTS. 



Annual report on plant diseases, M. Hollrung {Jahrcshrr. Pflanzenkrank., 

 11 (1908), 1)1). VlI+362).— This report, published in 1910, is a review of the 

 literature which appeared in 1908 i"elatiug to plant diseases and insect pests, 

 and methods for their control. 



Of the 1,37.3 titles noted, over 600 are abstracted at some length. The gen- 

 eral arrangement and treatment of the topics are similar to those in previous 

 reports (E. S. R., 21, p. 640). 



Notes on fungus diseases of plants, L. H. Pammel and Charlotte M. King 

 (Proc. loiva Acud. Sci., 16 (1900), piJ. Jfl-91, charts 39). — The authors discuss 

 the nature of disease, factors of environment in plant disease, fungi as the 

 cause of disease, soil moisture and fungus diseases, weather and fungus diseases, 

 some epidemics of fungus diseases (mildews, rusts, downy mildew, etc.), im- 

 munity to disease, and biologic si)ecies. 



The article closes with tables showing the comparative distribution of the 

 common fungus diseases in Iowa from 1870 to 1908, inclusive, the comparative 

 distribution over the United States of the common fungus diseases from 1900 

 to 1907, inclusive, charts showing the annual precipitation and mean surface 

 temperatures from 1900 to 1907 throughout the United States, and the areas 

 a fleeted by potato rot, powdery mildew of the cherry, ash rust and apple rust in 

 1884, wheat and grain rust in 1904. and potato rot in 1903 and 190f). 



Annual report of the mycologist, J. B. Rorer (Bd. Agr. Trinidad, Ann. Rpt. 

 Mycol., 1910, PI). 8). — A general report is made on the diseases of cacao, sugar 

 cane, coconut palm, bananas, and other crops. Diseases of cacao were found 

 to be responsible for the greatest losses, and were given special attention. Pre- 

 liminary studies of tree canker and pod rot are reported, and a more detailed 

 account of this work is abstracted on page 748 of this issue. 



Mycological notes, F. von Hohnel {Sitzber. K. Akad. Wiss. [Vienna], 

 Math, \atiiriv. Kl., 118 (1909), I, .Yo. 6, pp. 813-90.',, figs. 3).— In a taxonomic 

 discussion of many parasitic genera and species, some of which are described 

 as new, the author gives the characteristics of rUiiUachoni sorylti n. sp. on 

 Sorghum vulgare from Java, and Micropcrella qucrcus n. g. and sp. and Juponia 

 qucrcus n. g. and sp. on the leaves of Qtterciis glaiica from Japan. 



Parasitic plants observed in Torino and vicinity during 1909, P. A'oglino 

 (Ann. It. Accad. Agr. Torino, 52 (1909), pp. 277-300). — A list is given of about 

 60 species of bacteria and fungi parasitic on forest, orchard, field, garden, and 

 wild plants, together with the characteristics of several of the more important, 

 including Sclerotinia oci/mi n. sp.. Botnjtis parasitica colchici, B. cincrca dianthi, 

 Ccnangiinn, populncnni or the ascogenous form of DotJiichiza populca, and the 

 jirobable reference (»f the oak Oidium to O'idiiini rcntricosmn. 



Of the parasites listed there are 3 species of bacteria, (> of Phycomycetes, 17 

 of Asconiycetes, 6 of Basidiomyeetes, and 27 of imperfect fungi. 



Mycological review for the year 1908 with notes on the fungus diseases 

 of alfalfa, G. Briosi (Bol. Min. Agr., Indus, c Com. [Rome], 9 (1910), Scr. C, 

 No. 2, pp. Jt-l-'i; ahs. in Riv. Patol. Veg., J, (1910), Xo. 9-10, pp. 130, 131).— Fre- 

 ceding a general statement of the number of fungi examined and identifietl at 

 the botanical station at Pavia. is a discussion of diseases of alfalfa in which 

 the following are noted: Powdery mildew (Peronospora trifoliorum). rust 

 (Uromyccs striatus)^ smut (TiUetia glomcrulata), downy mildew (Erysiphc 

 polggoni), leaf spot (Plcosphwrulina hriosiana and Pscudopcziza mcdicaginis), 

 canker (Sclcrotinia trifoliorum, Mitruta sclerotiorum. Typhula trifolii, and 

 Tibrissca sclerotiorum) , anthracnose (CoUetatrichum trifolii), bacteriosis, leaf 

 diseases (Phyllosticta mcdicaginis, Ascochyta mcdicaginis, Scptoria medicaginis. 



