1056 EXPERIMENT STATION RECORD. 



a number of fungicides, sueh as copperas, Bordeaux mixture, animoniacal copper 

 carbonate, corrosive sublimate, sodium carlxmate, and creolin. The effect of di^^ing 

 trenches around infested areas has also been the subject of examination, and the 

 resistance of different varieties of alfalfa is being studied. A report on these studies 

 is to be expected in the future. Notes are given on tiie collection of economic cacti at 

 the station, and attention is called to the prevalence of the sorghum smut in differ- 

 ent parts of the Territory. For the prevention of this disease, the author recom- 

 mends the Jensen hot-water treatment. 



The rust of flax, L. M.vrmier (ilfisr. Binl. ded. an, A. Giard, Paria, 1S99, p. 440; 

 abs. ill Centbl. Bakt. u. Par., 2. AM., G (1900), No. J7, p. .568).— The so-called rust of 

 flax is said to be due to an anaerobic Tjacillus. The pectose of the cell membrane is 

 said to be changed to calcium pectate under the influence of the organism. 



Wlieat diseases, K. Helms (Join: Dept., Agr. West-. Australia, 1900, Feb.,j)p.:2ri-32, 



Some experiments in dealing- with, bunt, or the stinking smut of wheat, 

 W. Fakrer (Agr. <i(tz. Xnr South IFafes, 11 (1900), No. 5, pp. 336-344). 



Diseases of the sugar cane (Prog. Me.dco, 7 {1900), No. 321, pp. 517-520). 



A turnip disease, W. Carruthers (Jour. Hort., 52 (1900), No. 2711, p. 244)- — A 

 brief note is given on a disease of turnips and swedes that is due to bacteria. 



The rusts of horticultural plants, B. D. Halsted (Trans. MassacMiseUs Hort. 

 Soe. 1900, I, j)p. 11-29, ph. 2). — A lecture in which a number of common rusts are 

 described and preventive treatments recommended. 



Diseases of celery, H. H. Hume (Florida Sta. Ppt. 1899 and 1900, pp. 34-37, p/.s. 

 2). — A popular description is given of the celery blight (Cercospora apii), center 

 blight which is i)robably of bacterial origin, and the leaf spot (tSeptoria pdroaelini 

 apri), together with remedies suggested for their repression. 



Fung-US diseases of cucumbers, tomatoes, and lettuce under g-lass, <t. E. 

 Stone (Trains. Ma-'<.'<(ir]iii)<rtt.'< Hort. Sor., 1900, 7, }>p. 117-126). — A lecture in which 

 the diseases of these plants when grown under glass are described. 



Downy mildew of the cucumber, H. H. Hume (Florida Sta. Rpt. 1899 and 1900, 

 pp. 30-34, pi- 1) • — The downy mildew of the cucumber (Plasmopara cubensi.'!) is 

 described and its occurrence in the United States is historically reviewed. The char- 

 acteristics of the disease are shown, and it is stated that in Florida the fungus lives and 

 thrives throughout the entire year, so that the formation of resting spores is not 

 essential. A brief account is given of experiments conducted for the repression of 

 this disease, in which the plants were sprayed with Bordeaux mixture. Rainy 

 weather followed the application of the fungicide, the rainfall being so heavy as to 

 destroy many of the plants, ))ut upon those surviving the effect of the spraying was 

 quite marked. 



Yellows in peach, trees (Gurd. IUuh., 22 (1900), No. 1138, p. 573). — Suggestions 

 are given as to increasing the vigor of trees so as to prevent peach yellows. 



Wart-like outgrowths on Pirus malus chinensis, N. W. KissA (Zl^flir. I'jlan- 

 zenkrank., 10 [1900), No. 3-4, pp. 129-132, ph. 2). — The occurrence of peculiar out- 

 growths is mentioned and their anatomical structure described. They are believed 

 to be of little injury to the plants bearing them, aside from the material required for 

 their formation and their disfiguring the host. They are rather small and have 

 somewhat the ai)pearance of clusters of buds. 



The treatment of the fumag-ine of grapes, L. ])k(;kully (Prog. Agr. rt ]'it. 

 (Ed. H Est), 22 (1901), No. 3, p. 67). — Notes are given on this disease, and the treat- 

 ment previously recommended (E. S. R., 12, p. 61) is again advised. 



A disease of grapes in the Caucasus, L. Montemartini and L. Farneti (E.rtr. 

 Atti li. Inxt. Hot. rnir. J'aria, n. .sr'r.,7 (1900), pp. 14, ]>l. 1). — Phjinidoxporaimronini, 

 n. sp., is described. 



The biology and practical prevention of the leaf rust of white pine, C. 

 VON TuBEUF (Abr. K. Gesundheitsamte, Biol. Al>t., Leaflet 5, pp. 4, figs. 3). 



