858 EXPEKIMENT STATION RECORD. 



flowers without blooming-; and carpoptosis, the fiill of young- fruit. 

 These diseases seem to l)e due to defective nutrition and are larg-ely 

 mfluenced I)y the meteorological conditions of the season in which 

 the}" appear. 



A fig disease, G. :\1a8SEE {Gard. Chron.,3. ser., 28 {1900), JS^o. 706, 

 2). o, ji<j. 1). — A tig disease, due to Cercospora l)olleana, is described. 

 The fungus is of wide distribution, being known to occur throughout 

 the entire Mediterranean region, in Austria, and also in Argentina. 

 The leaf of the plant is the part most generally attacked, the fruiting 

 branches of the fungus forming olive-green patches on the under sur- 

 face of the leaf. On the upper surface, over these discolored areas, 

 the leaf assumes a brown or russet tinge, eventually turning 3'ellow 

 and dropping. AVhen a loss of foliage occui's on a large scale, the 

 fruit is arrested in its development and also falls off at an early stage. 

 In some instances the .young fruits are attacked. Although a very 

 destructive parasite when present in c[uantity, it appears that no serious 

 attempt has been made to arrest its progress bej^ond collecting and 

 burning its diseased fallen leaves. It is thought that spraying with 

 Bordeaux mixture would doubtless be of service in preventing the 

 spread of the fungus, if done in suflicient time. 



The sulphuring of grapes, F. Simoxet {Vigne Amer., 2^ {1900), 

 JSfo. 5, pp. lliS-Uio). — The author reports upon a number of trials of a 

 method of apph'ing sulphur to the Othello Aariety of grapes. This 

 variety is said to be extremel}^ sensitive to the ordinar}- application of 

 sulphur for the prevention of mildew. As a result of the experiments 

 it is shown that these, or other very sensitive varieties, may Ije suc- 

 cessf ull}' treated for the prevention of oidium by apph'ing the sulphur 

 in what is termed the Garanger method, better known as "Grisou 

 liquid.'' This consists of boiling for 6 hours a mixture of equal 

 parts of sulphur and recently slaked lime. The liquid is decanted off, 

 and to each liter of the mixture from 40 to 60 liters of Avater are added. 

 Four sprayings during the season are recommended. 



Mercury in the products of vines sprayed -with the mercurial 

 mixtures, L. Vignox and J. Perraud {Sri. Amer. Suj),,Ifd {1900)., 

 Ko. 12G2,p). 20238). — On account of the rather wide use of corrosive 

 sublimate as a fungicide, the authors have made an investigation of 

 products of the grape to ascertain the percent of mercury in them. 

 Draft wine, press wine, lees, the residuum, and the grapes themselves, 

 from vines which had been treated with various fungicides containing 

 corrosive sublimate, were investigated. The results of analyses show 

 that the products of the fermentation of grapes treated with mercu- 

 rial mixtures in the proportions tested contained only minute traces of 

 mercury and consequentl}" could be used without danger. The effect 

 on the plant, however, showed that the use of corrosive sublimate was 

 decidedlv detrimental. 



