548 EXPERIMENT STATION RECORD. 



Exoascus deformans, G. Zauli {Bui. R. Soc. Toscaua Ort., 3. ser., 12 (1907), 

 No. 11, pp. 325-327; abs. in Jour. Roy. Hort. Soc. [London], 33 (1908), No. 2, p. 

 597).— All account is given of experiments by V. Peglion for the control of 

 E. deformans on the peach tree. It is said that this fungus can be successfully 

 controlled by the use of a wash consisting of copper sulphate 2 kg., lime 1 kg., 

 ammonium chlorid 0.2 kg., and water 100 liters. This should be applied before 

 the opening of the buds, and if the season is favorable, a single washing of the 

 trees is sufficient. If, however, the weather should prove rainy, a second appli- 

 cation should be made while the trees are still in a dormant condition. 



According to the account, a tree treated with this fungicide retained its 

 leaves, whereas others not treated lost all theirs through attacks of the fungus. 

 The treated tree fruited prolifically and the accustomed falling of the fruit did 

 not occur. 



American gooseberry mildew (Dept. Agr. and Tech. Instr. Ireland Jour., 

 8 (1908), No. 3, pp. 479-Ji8Jf, pi. 1, figs. 3). — A description is presented of the 

 gooseberry mildew due to Hplicerotheca mors-uvw, attention is called to its de- 

 structive nature, and a warning given against the importing of plants from 

 regions that are known to be infested by the fungus. Where the disease is 

 present, spraying with Bordeaux mixture or some other fungicide and the 

 burning of diseased plants, etc., are recommended. 



A brief note is given of the European gooseberry mildew (Microsphwra gros- 

 sularicE), which is seldom found on the berries, confining its attacks chiefly to 

 the leaves. This mildew, it is said, can be held in check by spraying with a 

 solution of potassium sulphid. 



[Some vine diseases], F. T. Bioletti (California Sta. Bui. 197, pp. 1^7- 

 158, figs. 12 ) . — A description is given of the powdery mildew of grapes due to 

 O'idium sp., the Anaheim or California vine disease, brunissure, black knot, and 

 coulure. So far as known, the causes of these diseases are described and 

 methods suggested for the prevention of injury by them. 



Notes on grape downy mildew in 1907, H. Faes (Chron, Agr. Vatid, 21 

 [1908), Nos. 8, pp. 189-193; 9, pp. 207-212).— While the mildew was late in 

 appearing during the summer of 1907, the conditions for its development were 

 such that it spread rapidly and proved very destructive. Under the author's 

 directions, experiments were carried on at the viticultural station in combating 

 the disease, and an account is given of the results of the different treatments. 



A 2 per cent Bordeaux mixture when applied in sufficient quantity proved 

 efficient in controlling the disease. It was found that it should be applied at 

 the rate of from 40 to 50 gal. per acre at the first spraying and from 75 to 

 100 gal. per acre for each subsequent application. The sprayings should be 

 made at intervals of 15 days, and for the prevention of the powdery mildew 

 sulphur should be applied at like intervals after the second or third spraying. 



During the same summer the author tested the efficiency of combined fungi- 

 cides when applied in liquid form. Plats of equal extent were sprayed with 

 1 and 2 per cent Bordeaux mixture, a 1 per cent solution of copper acetate, 

 formalin, Bordeaux mixture neutralized with alkaline polysnlphids, and formi- 

 dol, which is said to be a combination of formic acid and copper. The result- 

 ing crops on the different plats were collected, and the yields were decidedly 

 in favor of the Bordeaux mixture and the copper acetate solutions. Bordeaux 

 mixture neutralized with alkaline polysnlphids gave a much diminished yield 

 of grapes, and formalin still less, the crop where this fungicide was used being 

 almost an entire failure. 



The use of proprietary mixtures for the control of downy and pow^dery 

 mildew, J. P'ischeb (Mitt. Weinbau u. Kellerw., 20 (1908), No. 7, pp. lO.'i- 

 109). — A series of experiments was conducted to test the value of neutral 



