DISEASES OP PLANTS. 149 



Outbreak of downy mildew m 1913, J. Capus (Rev. Vit., 4I (1914), Nos. 

 1060, pp. 398-403, fujs. 2; 1061, pp. 428-4-^3, figs. 2; 1063, pp. 419-483, figs. 3; 

 1064, PP- 508-^13). — The author organized an inquiry, which was carried out 

 in 1913 in several parts of France simultaneously, regarding dates of mildew 

 outbreali, the temporal and successional relations of meterologoical phenomena 

 to each phase of evolution of the fungus, the apparent relation of each out- 

 break to others, and means of control of the causal organism. 



Presenting results obtained in descriptive and graphical form, the author 

 states that the general course of the attaclis in the various districts was some- 

 what the same as in 1910, but some differences ai»peared in severity and in 

 other respects. At least two primary outbrealvs occurred in two regions. Sec- 

 ondary attacks are favored by rain, and the lengths of intervals between such 

 outbreaks are affected by the same agency. 



Com.bined treatment for downy mildew, B. Zachaeewicz (Rev. Vit., 4I 

 (1914), ^0. 1054, pp. 237-239). — The author gives explicit directions for a 

 so-called combined treatment, in five applications, for downy mildew in vine- 

 yards, which is approved after having been tested under his supervision and 

 having proved its superiority over simple treatments in 1910 and other years 

 of severe attack. 



Node canker in grapevines, R. Maire and L. Trabut {Rev. Vit., 4I (1914), 

 No. 1065, pp. 537-541, figs. 5). — ^The authors describe the effects of a disease 

 attacking grapevines at the nodes. This trouble is ascribed to a fungus held 

 to be a new variety and technically described under the name Phoma cookei 

 rectispora. 



Root rot of grape, R. Brunet (Rev. Vit., 41 (1914), Nos. 1065, pp. 533-537, 

 pi. 1, figs. 4; 1066, pp. 561-567, figs. 11; 1067, pp. 589-593, fig. i).— The author 

 presents the results of studies on several organisms noted in connection with 

 root rot of grapevines, in particular Dcmatophora necatrix, which is discussed 

 in some detail in its various phases. 



A preliminary report on raspberry curl or yellows, L. E. Melchees (Ohio 

 Nat., 14 (1914), No. 6, pp. 281-288, figs. 5).— Attention is called to the previous 

 note on this disease (E. S. R., 31, p. 545). While the disease is believed to be 

 the same as that described by Detmers, the cause is as yet unknown. 



A variety of Cladosporium parasitic on Agave and Echeveria, M. Savelli 

 (Ann. R. Accacl. Agr. To)i}w, 56 (1913), pp. 112-114)- — "fhe author reports a 

 study of a fungus parasitic on the upper leaf surfaces of A. americana and of 

 Echeveria in Turin. The parasite was at first referred to the species C. hcr- 

 harum, but on being further studied in culture it showed certain characters 

 which led the author to consider it a specialized form, and it was given the 

 name G. herbanim agavc-echeveria. 



The bud rot of coconut palms in Malabar, F. J. F. Shaw and S. Sundara- 

 RAMAN (Agr. Jour. India, 9 (1914), No. 2, pp. 111-117, pis. 3; Ann. MgcoL, 12 

 (1914), No. 3, pp. 251-262, pi. 1, fig. 1; abs. in Agr. News [Barbados], 13 

 (1914), No. 322, p. 286). — The authors give a description of the bud rot which 

 has recently become destructive among coconut palms in Malabar. 



This disease is said to be due to Pythium palmivoruni, previously noted by 

 Butler as causing rot entailing serious loss in the case of the Palmyra palm 

 in the Godavari district of India (E. S. R., 24, p. 351), also as attacking coco- 

 nut palms, though somewhat sparingly, in that region. Infection with spores 

 from pure cultures ou wounded or unwounded leaves and leaf sheaths under 

 atmospheric conditions resembling those during the wet season in Malabar 

 succeeded in reproducing effects typical of the disease. 



It is concluded from the results of this work that infections uiwn the ex- 

 ternal surface of the leaf bases do not take place very readily, but that 



