1140 EXPERIMENT STATION RECORD. 



mildew in IfOS are doscrilKHl. These exi»erinients were cnrriod on in a field 

 connected with the dejiartniental hii»<»ratory at Chalons-snr-Marne, and the 

 nieteorolofrical conditions are said to have been exceptionally favorable dnrin^ 

 the snninier for the develoituient of the mildew. After describing the meteoro- 

 logrical conditions for the summer of IfKKS, the exi)eriment3 are outlined. 



In these S lots of vines were given different treatments. The fungicides used 

 were neutral copi)er acetate and annuonia ; copper acetate and liquid polysul- 

 Iihids; cojtper acetate and s<tlid polysulphids ; Rurgundy mixture, sulphur, and 

 ammonia ; and some trade fungicides, the ba.'ses of which weie chlorate of 

 coi»per and sulphur, and bisuljihite of copper and formalin. Another plat re- 

 ceived sodium chlorate as a fungicide. Where no form of sulphur was added 

 to the fungicide the vines received during the summer 2 or 3 applications of 

 sublimed sulphur. In addition to the above fungicides, a test was made of a 

 solution of sea salt, but this proved of no value as a fungicide. 



In comparing the different treatments, it was found that the mixtures of 

 neutral copper acetate and polysulphids gave the l>est results. In comparing 

 the simple with the compound mixtures, the advantage was in favor of those 

 fungicides which were compounded, receiving sulphur or polysulphids. 



The mildews of the grape, I. B. P. Evans (Traii.sraul Agr. Jour., 7 (JHOfl), 

 A'o. ^0', lilt. .US-ill. pix. 2). — Descriptions are given of the downy mildew 

 (Plasnwpara viticola) and the powdery mildew of the grape (Uncimtla spi- 

 raJi-'i), and for their control it is recommended that Bordeaux mixture be used 

 for the downy mildew and sulphur for the powdery mildew. 



Note on the European apple-tree canker fungus, I. B. I'. Evans (Trans- 

 raal Atjr. -Jour.. 7 ( t'JO'.n. \o. .ii>. p. .ill). — A brief note is given on the occur- 

 rence of the apple-tree canker fungus ( .Vro/r/a tUtiKsima) in southern Africa. 



Diseases of the olive, L. Navarro and E. Noriega (Prog. Agr. y Pccuario, 

 1.5 {]!)09), Ao«. 611, pp. 31-33. figs. 3: 612. pp. 'il-'i'-K figs. 2\.—An account is 

 given of some new and little lino\^^l fungus and insect injuries of the olive that 

 have been observed by the authors in Seville, Spain. Among the principal fungi 

 noted are Glceosporiiun olivarum, ilacrophoma dalmatica, and Cycloconium 

 oleaginum. In addition there are notes on the tuberculosis of the olive, the 

 olive fly ( Dnriis olccr) and Diplosis olrisiign. 



The injurious action of calcium cyanamid on olive trees, F. Fbancolini 

 (Itdliif Agr., IHOO, Xo. J. pp. 12-1',, pi. 1; nhx. in Rir. Patol. Veg.. 3 (l!)Ofn, 

 No. 17, p. 268). — The results of 3 years' experiments are given showing the 

 effect of calcium cyanamid on olive trees. 



In 190G one lot of trees was fertilized with 2 kg. of Thomas slag. 2 kg. of 

 land plaster, and 1 kg. of calcium cyanamid. The check lot received 1 kg. of 

 nitrate of soda as the source of nitrogen, and the same amounts of the other 

 fertilizers as were given the test trees. Similar comparisons were made be- 

 tween nitrate of soda and calcium cyanamid in 1907 and 190S. 



In every case the calcium cyanamid proved injurious to the trees, the injury 

 being characterized by a browning of the foliage, the change of color iirogress- 

 ing from the tip of the leaf toward its base. Later the trees lost considerable 

 of their foliage and a large proportion of the fruit dropped from the trees. 

 In clay soils and those rich in humus, the injury was not as pronounced as 

 where the trees were grown in volcanic soils, which were poor in clay and lime. 



A bacterial disease of the peach, J. B. Roreb {Mycologia. 1 (1909), No. 1, 

 pp. 23-27). — According to the author, during the past 5 or G years peach grow- 

 ers in various sections of the country have called attention to a shot-hole 

 disease of peaches which in wet seasons has caused a great deal of premature 

 defoliation. 



