1918] DISEASES OF PLANTS. 51 



are said to comprise the list of the more important raspberry diseases in Min- 

 nesota. 



Grape downy mildew in 1916 at Montpelier, L. Ravaz (Prog. Agr. et Vit. 

 (Ed. VEst-Centre), 38 (1917), No. 18, pp. 41S-/,15, fiff. 1).—A study of the num- 

 bers and the locations of new cases of grape downy mildew of the second and 

 third outbreak has shown that such outbrealis arise from previous centers of 

 mildew attack, that the number of cases decreases with the distance from the 

 former center, and that the total number of eases increases greatly with the 

 successive outbreaks. The facts as observed and mapped are thought to explain 

 the presence of uninfected areas along with other areas seriously affected, also 

 the relative or exceptional apparent immunity of certain early or late varieties 

 which are mentioned. 



Iron in copper sprays for chlorosis, A. Donnadieu (Prog. Agr. et Vit. (Ed, 

 VEst-Centrc), 57 (1916), No. 34, pp. 176, i77).— The author relates experiences 

 claimed to show that the addition of 0.1 per cent iron sulphate to an acid (in 

 the case cited, a commercial) copper spray prevents or cures chlorosis in vines 

 subject thereto. The iron compound serves also as a fixative for the copper 

 in sprays employed for downy mildew. 



Wood rot of citrus trees, J. A. Stevenson (Porto Rico Dept. Agr. Expt. Sta. 

 Circ. 10 (1917), pp. 10; Spanish ed.', pp. 10). — A popular description is given of 

 wood rot due to the attacks of a number of species of fungi, with suggestions for 

 the control of the injury by pruning and protecting the wounds from infection. 



Fungus diseases of coffee, II. Averna-Sacca (Bol. Agr. [Sao Paulo}, 17. ser., 

 1916, Nos. 10, pp. 790-840, figs. Ifi ; 11, pp. 878-922, figs. 46).— Descriptive dis- 

 cussions are given of cryptogamic diseases of coffee, including Dematophora 

 necatrix, Hysterium coffeanum, Pezisa (?) coffeicola, Capnodium brasiliense, 

 Pseudodiaporthe coffece, Euryachora coffeicola, Scutellum (?) coffeamim, Eutypa 

 lutibunda coffeicola, Rhapidospora coffeicola, Didymosphmria coffeicola, Sphw- 

 rella coffeicola, Anthostomella coffece, Leptosphceria coffcigena, Venturia coffei- 

 cola, Oraniella coffeicola, Fusarium pallens, Periconia goldeniana, Macrosporvum 

 coffeanum, Cercospora coffeicola, Gloeosporium coffeanum. Colletotrichuni 

 coffeamim, C. coffece, C. incarnatum, Dendrophoma coffeicola, Phyllosticta 

 coffeicola, Rliabdospora coffece, Hendersonia coffece, Discosia thew, Fusarium 

 coffeicola, Coniotliyrium coffece, Diplodia coffeicola, Macrophoma coffea:, Schizo- 

 phylluvi commune, Mioena (?) sp., and Physcia integrata sorechiosa. 



Tylenchus acutocaudatus in coffee trees, R. G. de Sotjza (Bol. Agr. [Sao 

 Paulo], 17. ser., 1916, Nos. 9. pp. 726-736, figs. 7; 11, pp. 873-878, figs. 3).— This 

 is a brief account of the mode of attack and the serious damage done to 

 coffee plants by the nematode T. acutocaudatus, which is found in the roots 

 but in none of the aerial portions. 



Wilt or crown-rot disease of carnations caused by Fusarium sp., P. A. van 

 der Bijl (Ann. Appl. Biol., 2 (1916), No. Jf, pp. 267-291, pis. 4).— The author, 

 giving an account of a disease characterized by a wet stem rot and leaf abnor- 

 mality, states that the trouble is due to a Fusarium, which is discussed. Ex- 

 periments looking to the control of the disease were ineffective in case of 

 formalin applied to the soU, but quicklime showed some improvement. Pre- 

 ventive measures include rotation and the use of cuttings and of soil known 

 to be free from infection. 



Carnation yellows, G. L. Pei-tiee (Proc. Amer. Carnation Soc, 25 (1916), 

 pp. 29-35). — This is an account, with some discussion, of recent work done on 

 carnation yellows, the cause of which remains unknown, although three forms 

 are here discussed. 



Seedlings rarely show yellows, though cuttings propagated from seedling 

 pl.nnts for two years invariably show that condition, owing presumably to 



