DISEASES OF PLANTS. 809 



The damping off of seedlings, .1. Ritzema Bos {Tijdachr. Flantenziekt, .■? (1S90), 

 pp. 1-4). — Notes art? given on attacks of I'ythinm debariiuniim on various seedlings. 



Plant galls formed by insects, C. Fl'lleii (Jgl. Ga:. X. S. Walts. 7 (1S96), Xo. 

 10, pp. i:9o-i:99). — Notes on some passive means of defense. 



An injurious disease of canaigre, P. Hkxxings {Xotisbl. Kgl. hot. Gart. und Muse- 

 ums, Berlin, 1S97. Xo. 7. pp. 238, 5-59). —Notes are given of a destructive leaf disease 

 of cjifiaigre, -which is caused by Oviilaria ohUijua var. Picking diseased leaves, 

 spraying with copper sulphate solutions, and destruction of all allied plants are 

 suggested means for jireventive treatment. 



Notes on the Erysipheae, C. E. Dkstree {Tijdschr. Plantenziekt, 2 {1S9G), pp. 

 5-111, figs. 6 k 



Forest fungi, anthracnose of poplars, B. I). Halsted {Proc. Amer. Forest. Assn., 

 11 {1S97), pp. 176-17S). — Notes are given of the injury done to young poplars by 

 Marsonia populi. 



Lathraea squamaria on conifers, vox Tlbpx'f {Forstl. natiiriv. Ztschr., 6 {1897), 

 Xo. S, pp. lU, l.'J). — Notes are given of the parasitism of this plant on Pkea excelsa. 



On some species of the genus Urophlyctis, P. Magxis {Ann. Bot., 11 {1897), 

 Xo. 41, pp. S7-9C, pis. 2). — Notes are given of the synonymy of some of the species 

 of these parasites, n-o^j/i/i/c/isj)i(?j>osa, V. major, •,n\(\. U. Irierjeriana being discussed 

 at some length. Their attacks uiiou their hosts — beets, parsnips, etc. — result in 

 tumor-like swellings. 



Pear blight, J. T. Stixsox {Arkansas Sta. Bui. 43, pp. 117-120).— Tha author rec- 

 ommends for the treatment of pear blight that given by M. B. Waite in the Year- 

 book of this Department for 1895 (E. S. R., 8, p. 796). 



Some injurious fungus diseases, J. Craig {Canada Exptl. Farms lipt. 1895, pp. 

 122-l?4.fi(js. 3). — Descriptive notes with suggestions for prevention of grape anthrac- 

 nose, raspberry anthracnose, leaf spot of the violet, and carnation rust. 



Diseases of plants induced by cryptogamic parasites, K. Fiieiheru von 

 Tebeit {English edition by W. G. ^Smiih. London and Xtw York: Longmans, Green 

 cV Co., 1897, pp. AT, 598, figs. 330). — The author of this edition offers an unnecessary 

 apology for presenting a translation and revised edition of this valuable publication. 



The ■work, which is intended to deal only with those diseases of jdants produced 

 by cryptogamic organisms, is divided into two parts, the first of which is more or 

 less general in its nature and is practically a translation of the original with certain 

 modifications found necessary in adapting the work to the requirements of English 

 readers; while the second part, to which many additions have been made, is a sys- 

 tematic arrangement of cryptogamic parasites. The chapters discussed in the first 

 part of the work are : Parasitic fungi ; reaction of the Lost to parasitic attack ; rela- 

 tion of parasite and substratum; natural and artificial infection; disposition of 

 plants to disease; preventive and combative measures; economic importance of 

 diseases of jdants: and symbiosis, which is discussed under two heads, mutualism 

 and uutricism. 



The second part treats of the pathological ]ihenomena, together with a description 

 of the organism producing them. Where diseases are of economic importance, 

 measures for prevention and extermination are also suggested. Necessarily the 

 book contains a more complete list for Germany and adjoining countries than for 

 other regions, yet the editor of the present edition has included and brought up to 

 a quite recent date most of the imi)ortant work in America, Great Britain, and 

 elsewhere. 



The chapters of the second part are: (1) Pathogenic fungi of plants, under which 

 Leading are treated the lower fungi, Chytridiaceie, Zygomycetes, and Oomycetes; 

 the higher fungi, which include Ascomycetes, Ustilaginea-, and Uredinea>, Basidio- 

 mycetes, and the fungi imperfecti ; (2) pathogenic slime-fungi ; (3) pathogenic 

 bacteria; and (4) pathogenic algte. A complete index of parasites and a general 

 index complete the volume. 



