464 EXPERIMENT >;TATION RECORD. 



7'V, 7fl). — Notes on the ocfurrence of Flu-vnajjani ritim/ii on <rrap('vineH at the New 

 Jersey Experiment Station. 



Permang-anate of potash, for grape mildew, A. Simkon {Prog. Agr. ft Vit. {Ed. 

 L'E.'^t), Jl {lUOO), No. 36, pp. 327, ,)-?<?) .—The addition of 50 gm. of permanganate 

 of potst-^h to a hectoliter of Bordeaux mixture ii^ said to increase the efficiency of the 

 fungicide when used in coml)atin<i: grape mildew. 



Practical instruction in combating Peronospora, A. Bizzozero {Instruzioni 

 pratk-he per combattere la 2)eroiiospora. Parma: Rossi- Uhaldi, J 900, pp. 29). 



The California vine disease in Avellino, C. Cas.vli and T. Ferraris {Giom. 

 Vit. e Enologia, 7 {1900), pp. 10, ph. 2). 



Brown spot diseases of grapes and Plasmodiophora vitis, J. Behrens {Sep. 

 Weinhax n. WeinJiande!., 1899, No. 33, pp. 2). 



Grape scald, L. Degrully {Prog. Agr. el Vit. {Ed. L'Est), 21 {1900), No. 32, pp. 

 189,190, pi. 1). — A serious affection of grapes is reported in which the fruit and leaves 

 are injured. They present some of the characteristics of grapes in the last stages of 

 black rot, white rot, etc. The cause of the trouble is thought to be the unusual hot 

 weather. In some parts of France the grape crop which had been especially promis- 

 ing is very seriously injured and less wine will be made than last year. 



Some injuries to grapes, E. Bringuier {Mess. Agr., 5.ser., 1 {1900), No. 8, pp. 

 301-319) . — Notes are given on a number of injuries to which grapes are subject, such 

 as freezing, malnutrition, fungi, etc. 



A stunted condition of grapevines, L. Ravaz {Prog. Agr. et Vit. {Ed. L'Est), 

 21 {1900), No. 21, pp. 608-610, pi. i).— Under the name "cabuchage" the author 

 describes a diseased condition of grapes which he says is the same as court-noue — a 

 stunted growth due to a number of causes. 



Stunted growth (court-noue) of vines, L. Ravaz {Prog. Agr. et Vit. {Ed U Est), 

 21 {1900), No. 24, pjp. 694-703, pi. l,figs. 12). — This is essentially the same article as 

 that noted from another source (E. S. R., 12, p. 260). The author states that varie- 

 gation is a common accompaniment of the disease. 



The successful prevention of grape diseases, W. Seelig {Proskauer Obstbau- 

 Ztg., 1900, No. 4, })]>■ 49-51). 



Diseases of chestnuts in Savoy and Valais, L. Crie {Bui. Min. Agr. \^France'\, 

 19 {1900), No. 1, pp. 120-134). — A report on observations in these two regions on the 

 various causes of disease and injury to chestnuts. A number of fungi are reported as 

 causing great injury, among them are Agaricus melleus, Torula exitiosa, Phyllosticta 

 maculiformis, Polyporus sulphureus, etc. 



A disease of Tradescantia, A. Howard {Anii. Bot., 14 {1900) , No. 53, pp. 27-38, 

 pis. 2). — A rather sevei'e attack of Tradescantia zebrina and T. _/?«?;(nw;j/.s(.s in green- 

 houses is reported. Dead leaves and stems covered with fungi as well as numerous 

 dark spots and patches were aVjundant. Among the fungi was a species of Botryo- 

 sporium. Inoculation experiments were successfully carried on, the mycelium usually 

 penetrating the epidermis, infection through the stomata being rarely observed. 

 Tlie affinities of the fungus are discussed at length. The species seems to agree with 

 the descriptions of B. diffusum, a common saprophyte on rotten wood, branches, and 

 leaves. 



Natural methods for the prevention of plant diseases, H. Muller-Thurgau 

 {Schweiz. Landu: Centbl., 1900, No. 3, pp. 69-86). 



The use of copper sulphate and sulphur as preventives of plant diseases, 

 J. Behkexs {Wriiiihl. fjiiidw. Vcr. Baden, 1900, No. 9, pp. 1 10-113). 



The causes of injuries due to spraying with copper fungicides, Weiss 

 {Prakt. Bl. Pjtanzea.^rlintz, 3 {1900), No. 2, pp. 13-15). 



A competitive trial of spraying apparatus {/Jsrhr. Pflanzcnkrank. , 10 {1900), 

 No. 1, pp. 42-53, figs. 12). — A report is given of the relative efficiency of a number of 

 forms of spraying apparatus in applying various ftingicides and insecticides. 



