486 EXPERIMENT STATION RECORD. 



reported on species of KluHini, and with ]'. p<>lii<joni, and is led to believe that the 

 funj^us cansiii^' tliis disease is ])Ossibly identical with the latter species. 



Brown rot of fruit [Gard. Clinm., 3. ser., 34 {1903), No. 804, P- 30).— A brief 

 account is given of the brown rot of fruit caused by attacks of Sderotinia fructigena 

 on apples, pears, plums, cherries, and peaches, as well as various wild fruits 

 belonging to the same family of plants. The effect of the fungus on the foliage and 

 fruit is described at considerable length. 



For the prevention of the disease it is recommended that all dead twigs and 

 shriveled fruits should be collected and burned, and the trees and ground about 

 them thoroughly sjn-ayed with a solution of sulphate of iron 25 lbs., sulj)huric acid 

 1 pt., and water 50 gal. The application should be made in January or February 

 before the leaf buds begin to swell. After the expansion of the leaves the trees 

 should be sprayed at intervals wdth a weak solution of Bordeaux mixture. 



Ripe rot or bitter rot of fruits, N. A. Cobb {Ayr. Gaz. New South Wales, 14 

 {1903), No. 7, ])p. 627-653, pis. f, figs. 44)- — A report is given of the ripe rot or bitter 

 rot of fruits, in which attention is called to a previous publication by the author 

 stating that he was able to cause the disease in peach, plum, nectarine, pear, cherry, 

 grape, and mango after 5 days by inoculating with the ripe rot of the apple ( Glceo- 

 sporiiun fructigenunt). 



A review is given of the work previously published by the New Jersey Stations 

 (E. S. R., 5, p. 401) on the cross inoculation of different i^lants with this fungus, and 

 a discussion is given of various inoculation experiments recently performed by the 

 author. These inoculations included passion fruit, lemon, banana, grape, pear, date 

 plum, quince, apple, peach, hawthorn, guava, and tomato. Reciprocal inoculations 

 were made between these different hosts, and the disease was produced in nearly 

 every instance. The author is led to believe, as a result of these investigations, that 

 there are in reality fewer forms of the fungus than have been hitherto described. 



Experiments on combating downy and powdery mildew of grapes in 1902, 

 H. Kaserer {Ztschr. Lundw. VensucJisw. Oesterr., (1903), No. 3, jjp. ■205-209). — 

 Experiments are reported on the efficiency of a number of fungicides for the pre- 

 vention of the downy and powdery mildews of grapes. In one series of experiments 

 antimony salts were tested, solutions of antimony sulphate and sodium sulphoanti- 

 moniate being employed. The solutions were rendered slightly alkaline by the 

 addition of milk of lime and then sprayed on the grape foliage. Beginning at the 

 same time the principal part of the vineyard was given 3 applications of Bordeaux 

 mixture. At the end of the season no downy mildew was noticeable on the vines 

 treated wdth Bordeaux mixture, while those sprayed with the antimony solutions 

 showed evidence of Peronospora attack early in August. 



A compound of copper called "resin-acid copper" in combination with sulphur 

 was tested as a combined treatment for the downy and powdery mildew without 

 effect. The best results were obtained from the sinuiltaneous treatment of the 2 

 diseases when vines were sprayed with an alkaline Bordeaux mixture, to each kilo- 

 liter of which was added 300 gm. of sodium thiosulphate. Vines so treated did not 

 show the slightest trace of downy mildew and powdery mildew was held in check, 

 although especially troublesome on the adjacent unsprayed vines. 



A " red scald" of grapes, H. MtiLLER-TnuRGAU {Centbl. Bakt. u. Par., 2. Abt., 10 

 {1903), Nos. 1, pp. 8-17; 2, pp. 48-61; 3, pp. 81-88; 4, PP- 113-121, pis. ,5).— A descrip- 

 tion is given of a disease of graj^es in which the foliage is severely attacked. This 

 disease has been known for a number of years, and is quite widely distributed in 

 Switzerland, and possibly elsewhere. It is known by a number of common names, 

 such as red scald, singe, leaf brown, sun burn, and red burn of grape leaves, the 

 author preferring the latter designation. Both red and white grapes are subject to 

 infection, although some variation of susceptibility of different varieties is known. 



