546 EXPERIMENT STATION EECORD. 



Investigations are in progx'ess to determine under what conditions, if any. 

 such perithecia may mature. 



Notes on a new treatment for American gooseberry mildew, G. Dorogin 

 iZtschr. Pflanzenhrank., 23 {1913), No. 6, pp. 33^, 335).— The author reports 

 some preliminary experiments. 



The complete treatment as recommended for American gooseberry mildew 

 includes the removal and destruction in autumn of all suspected parts of the 

 plants, followed immediately and again in early spring by spraying plants and 

 earth with 1 to 3 per cent iron sulphate, and spraying the young foliage every 

 10 days with 0.5 vev cent soda, 0.25 per cent soda and potash, or 0.25 per cent 

 potash. 



Disease of Veronicas, Ivy Masses (Oard. Chron., 3. ser., 55 (1914), No. 1429, 

 p. 335, fig. 1). — The author reports that among specimens of diseased plants 

 sent in for examination, one of T'. hulkeana was found to be attaclied by Perono- 

 spora grisea, heretofore thought to be restricted to wild species of Veronica. 

 The young leaves dry and wither, the under surface showing a dingy white 

 mildew, proving to be the fungus named. Growth in case of attack of 

 V. JmJkcana is checked by death of the young leaves and shoots, while some 

 other species of Veronica are little affected by its presence. 



The diseases of nut trees, INI. B. Waite {North. Nut Growers Assoc. Proc, 

 4 {1913), pp. 50-59). — In this paper the author gives a brief account of the 

 principal diseases of the hickory, pecan, and walnut, calling attention to the 

 fact that the native parasites attack the introduced species to a very consid- 

 erable extent, while the attack on the native species is of comparatively little 

 consequence. 



Present state of the chestnut blight, J. F. Collins {North. Nut Growers 

 Assoc. Proc, 4 {1913), pp. 25-29). — The author has given a popular summary 

 of the present state of information relating to the chestnut blight in this coun- 

 ti"y, and called attention to the discovery in China of a disease which is sup- 

 posed to be identical with the chestnut disease in this country (E. S. R., 29, 

 p. 753). 



The question of resistance of varieties to chestnut blight is discussed at con- 

 siderable length. In noting its distribution the author states that it is known 

 to occur in Maine, New Hampshire, Vermont, New York east of the Catskills 

 and as far north as Lake George, and generally as far south as northern Vir- 

 ginia. One nursery has been reported in North Carolina as infected, and 

 chestnut ti'ees in British Columbia are also reported as having the disease. 



The chestnut blight in Virginia, F. Gravatt {Rpt. State Ent. and Plant 

 Path. Va., 9 {1912-13), pp. £i-25).— The author states that chestnut blight is 

 established in 19 counties in northern Virginia and that the chief work carried 

 on in connection with this disease in Virginia has been the general inspection 

 of the State and the destruction of trees showing the disease in advance isolated 

 localities. 



Warty roots of Gymnocladus canadensis, A. Sperlich {Ztschr. Pflamen- 

 krank., 23 {1913), No. 6, pp. 321-331, figs. 7). — Illustrations and descriptions are 

 given of tumorous swellings on roots of G. canadensis and other abnormalities 

 noted in connection therewith. It is stated that the abundant deposit of mate- 

 rial in the tumorous regions interferes with the normal movement of nutritive or 

 elaborated materials, some of the growths showing internally some characters 

 of branches. 



Some observations on plant diseases caused by parasitic fungi, P. Magnus 

 {Jahrcsber. Vcr. Angcw. Bot., 11 {1913), pt. 1, pp. 14-18, fig. 1).— Noting the 

 progress of O'idinm quercinum in northern France, the author states that this 

 fungus, said to be of American origin and to attack ordinarily the American 



