DISEASES OF PLANTS. 831 



"(1) After the grapes are gathered, collect all dried grapes and those which have 

 fallen from the bunches, together with all the leaves that are strewn on the ground, 

 and burn them. 



"(2) Prune as closely as possible, eliminating all the young sprouts. Collect and 

 burn the cuttings. 



"(3) During the latter part of March wash the vines with an acid solution of cop- 

 per suliibate to which there may be added iron sulphate if antbracnose be suspected, 

 the formula recommended being copper sulphate 10 kg., iron sulphate 10 kg., sul- 

 phuric acid 1 kg., hot water 100 liters. 



"(4) Upon the returnof spring and when the young shoots are 6 to 10 cm. in length 

 apply Bordeaux mixture, using 3 kg. copper sulphate to 3 kg. of lime. Apply when- 

 ever the atmosx)heric conditions will allow and repeat if washed off by rain. 



"(5) Ten or 15 days later, depending on the size of the sprouts, give a second 

 spraying. 



"(6; Give a third, fourth, and if necessary a fifth spraying at intervals of 15 to 30 

 days, dependent on the atmospheric conditions. 



"(7) Before the time for the appearance of oidium, dust the vines with sulphur 

 and dry copper sulphate or with co^^per sulphosteatite. 



"(8) Supplement these treatments if practicable by collecting and burning the 

 first leaves attacked by the black rot. 



"(9) Wherever there has been no previous severe attack, the first 3 suggestions 

 may be omitted, but by following out all the directions the vineyard will be free not 

 only of black rot but of mildew as well." 



A new treatment for grape mildew, L. SiPiiiRE {Compt. Bend.j 

 120 {1895), No. 4, 2>p. 220-222). — The author reports the successful use 

 of lysol as a remedy agaiust grape mildew. He was led to make a 

 trial of this material (1) ou accouut of its well-kuown power as a germi- 

 cide, (2) its ready solubility iu water, (3) its harmlessuess, and (4) its 

 cheapness. It was used in solutions varying in strength from 0.001 to 

 0.01, the best results being obtained when used in the strength of 

 0.005, which is obtained by adding 5 gm. of lysol to every liter of water. 

 When used in the strength recommended it proved as efficacious as 

 Bordeaux mixture and was more economicalby 28 per cent. Three 

 sprayings are necessary, and in France the proper time for their 

 application is April 20 to 30, May 1 to 8, and June 1 to 8. When 

 used in a strength of 0.004 it rids the leaves of all insects or larvae 

 that may be on them, and it may be used to rid the vine of all kinds of 

 parasites. 



The author thinks lysol will prove equally as effective against oidium 

 as it is shown to be against the mildew. 



A laboratory of plant diseases, C. W. Woodworth {California Sta. Ept. 1893 

 and 1894, pp. 435, 436). — A description is given of the laboratory of the University 

 of California for the especial study of plant diseases. 



Apple canker {Gard. Chron., 17 (1895), ser. 3, p. 342). — A controversial article in 

 which the author thinks conditions of planting and natural hardiness have more to 

 do with the disease than fungus attacks. 



The canker of larch (Oesterr. forsf. Zig., 13 (1S95), No. 2, pp. 11, 12).— K popular 

 article on the diseased condition due to Feziza tvilckommii. 



Concerning Nectria ditissima, F. Bandiscii (Centbl. Gen. Forstw. Tfien,21 (1895), 

 No. 2, pff. 51-56). — A popular article ou the cause of canker iu trees. 



