762 EXPERIMENT STATION RECOED. 



Some fungus diseases resembling black rot, V. Ducomet (Prog. Agr. et Vit. 

 {Ed. L'Est), 2-2 {1901), No. 34, pp. 225-233, pi. l).—li\ a previous publication (E. 

 S. R., 11, p. 759) the author described a number of fungus diseases which were of 

 importance on account of their great resemblance to the grape black rot. In the 

 present paper a number of other leaf diseases are described which, although usually 

 of infrequent occurrence, sometimes cause considerable injury to the plants attacked. 

 The resemblance to black rot is shown in the effect produced upon the foliage of the 

 plants. The diseases described are leaf spots of walnut, due to Marsonia juglandis; 

 of oleander, caused by Septoria oleandrina; of linden, due to S. tilm; of poplar, 

 caused by S. populi; of capers, due to Cercospora capparidis; of cork oak, due to 

 Plvjllosticta ilicina ; of vetch, caused hy Ascochyta vicise; of quince, caused by Sphxrop- 

 sis cydouife; and of hackberry, due to Taphrina celtis. 



Grape rot and Coniothyrium, L. Degrully {Prog. Agr. et Vit. {Ed. L'Est), 22 

 {1901), No. 32, pp. 161, 162). — Editorial comments are made on the gray rot of grapes 

 which is reported as abundant in a number of regions of France. Attention is called 

 to the claims made for a number of fungicides as means for the prevention of this 

 and other diseases. Among those commented upon are copper-sulpho-steotite and a 

 mixture of steotite and aluminum. The author states that neither of these substances 

 seems to be very efficient in preventing gray rot. Against the white rot, frequent 

 sprayings with copper fungicides are recommended and it is thought that the treat- 

 ment will to some extent keep in check the gray rot. 



Gray rot of grapes, J. Guexier {Prog. Agr. et Vit. {Ed. L'Est), 22 {1901), No. 36, 

 pp. 295,296). — A gray rot of grapes, caused by attacks of Botrytis cinerea, is reported 

 to have caused serious losses in many regions of France during the past year, in son.e 

 places as much as 50 per cent of the crop being destroyed within 2 days. The 

 fungus is said to have acquired a greater importance than that of the black rot, and 

 thus far no adequate means for its prevention seems to have been found. Charac- 

 teristics of the fungus and its attack upon the grape are described. 



"White rot of grapes, J. D. Catta and A. ]\Iaige {Bui. Agr. Algerie et Tunisie, 7 

 {1901), No. 16, pp. 398-400, figs. 3). — The occurrence of white rot of grapes in the 

 north of Africa is noted and descriptions given of the fungus {Charrinia diplodieUa) . 

 For the prevention of the attacks of this disease the authors recommend spraying 

 thoroughly with the better fungicides. 



The use of soda against grape oidium, A. Lebedeff {Prog. Agr. et Vit. {Ed. 

 L'Est) , 22 {1901) , No. 41, pp- 424-426). — A report is given of the use of a 2 per cent 

 solution of sodium carbonate for the prevention of grape oidium. The vines were 

 sprayed at frequent intervals during the season with this fungicide and very satis- 

 factory results secured. The author suggests that from 200 to 400 gm. of common 

 gljLie be added to each hectoliter of the fungicide in order to make it more adhesive. 

 It is also thought possible that by replacing with suli)hur the second treatment, 

 which is ordinarily given during the flowering period of the vine, the efficiency of 

 the fungicide will be still more improved. 



A root rot of grapes in Portugal {Agr. Jour. Cape Good Hope, 19 {1901), No. 7, 

 pp. 463-466). — An account is given of a disease of grapevines which is becoming very 

 troublesome in parts of Portugal. This is caused by a fungus similar to and probably 

 identical with Rosellinia necatri.v. The use of carbon bisulphid about the roots of the 

 vines is recommended as a means for preventing the distribution of the mycelium 

 through the soil. Diseased vines and other plants subject to attacks of the fungus 

 should be destroyed and good drainage, whicli is of primary importance, be pro- 

 vided. 



The red rot of coniferous trees {Rev. Eaux et Forefs, 40 {1901), No. 18, pp. 563, 

 664). — A description is given of the red rot caused by Trametes radiciperda, which 

 attacks spruce and Scotch pine. 



