DISEASES OF PLANTS. 649 



during 1910 because of favorable weatlier conditions. Winter pruning of 

 affected slioots lias materially cliecked the progress of tlie disease in the spring, 

 with the consequent result that in Cambridgeshire the fruit has remained clean 

 in practically every garden. 



Cicinnobolus as a parasite on Sphaerotheca mors uvas, O. Oberstein 

 {Ztschr. Pfiansenkrank, 20 {1910), Islo. 8, pp. 4-'/M52).— Attention is called to 

 the discovery of a species of Cicinnobolus, probably C. cesatii, parasitic on the 

 myceliuin of the American gooseberry mildew {S. mors uv(b). The various 

 species of Cicinnobolus and their fungus hosts are listed, and the suggestion is 

 made that the Cicinnobolus might be of value in checking the spread of the 

 mildew. 



Bacterial gummosis and court-noue in the vineyards of Mendoza, 

 J. Alazraqxji (Gorrwsis Bacilar y Court-noue en los Yinedos de Mendoza. 

 Buenos Aires: Min. Agr., 1910, pp. 33, figs. 6). — A report is made on the various 

 diseases affecting the vineyards of this district, special attention being given to 

 the prevalence, characteristics, and causes of gummosis and court-noue. which 

 were the most common diseases found. It is stated that gummosis is due to 

 Bacillus vittvoriis, which causes a clogging of the conducting vessels by the for- 

 mation of gum. 



Intensity of culture and the intensity of the California vine disease in 

 certain Italian vineyards, A. Pugliese {Bol. Arbor. Ital., 6 (1910), No. 2-4, 

 pp. 106-112). — The author discusses the relationship of this disease to the soil 

 and to the methods of culture used. It is claimed that certain soil conditions 

 associated with the intensive methods of cultivation in vogue have caused a 

 deterioration of the vine resulting in the so-called California disease. The 

 rejuvenation of the vineyards by breeding vigorous hybrids resistant to this 

 disease is recommended. 



Combined treatment for the Oidium, grape mildew, and Botrytis, 

 E. Zachaeewicz (Rev. Vit., 34 (1910), No. 887, p. 671).— The author describes 

 a combination of sprays and powders for combating these diseases, and gives 

 data as to formulas, and times and methods of application. The spray used 

 was a copper-sulphate mixture, and tlie powders were sulphur, lime and copper 

 sulphate, sulphur and copper sulphate, and burned plaster, soap, and copper 

 sulphate. About 12 applications are recommended for an ordinary season. 



First experiments in the treatment of grapevine mildew in the Bombay 

 Presidency, W. Burns (Dept. Agr. Bomhay Bui. 36, 1910, pp. IJ/, pis. 5). — 

 Tests were made in several localities as to the efficiency of Bordeaux mixture 

 in controlling the mildew. Three applications of a 3 : 2 : 25 Bordeaux mixture 

 were given, followed by a fourth application of a 3 : 2 : 40 solution. The usual 

 good results were obtained in all of the experiments, but the peduncles were 

 mildewed in some instances, even on the sprayed vines, and the fruit when ripe 

 still had much of the spray on it. 



Tlie fight against the mildew in Anjou, P. Maisonneuve (Rev. Vit., 34 

 (1910), No. 889, pp. 709, 710). — The results are given of experiments with Bor- 

 deaux mixture and oxychlorid of copper in combating the mildew. Four con- 

 tiguous plats were used, two of which received two applications of the Bordeaux 

 mixture, and two the oxychlorid of copper. For the third treatment the 

 oxychlorid of copper was applied to all the plats, and for the fourth treatment 

 the Bordeaux mixture was used on all four plats. 



At the end of the season the advantage was plainly in favor of the two plats 

 which had received the two initial applications of the Bordeaux mixture. On 

 these two plats the leaves were green and in good condition, while on the 

 oxychlorid of copper plats the leaves had yellowed prematurely and many had 

 fallen. 



