DISEASES OF PLANTS. 561 



The appearance of a bacterial disease of beets is mentioned, and also 

 experiments for the inoccnlation of potato blights. 



Some notes are given on tbe occurrence of various smuts and rusts 

 on cereals, and it is stated that spores of Ustilago maydis, U. eruenta, U. 

 crameri, TiUetia caries, and T. Icevis retained their power to germinate 

 for, at the most, two or three years. 



Fungi on the wheat plant, D. McAlpine (Agr. Gaz. New South Wales, 9 (1898), 

 No. 9, pp. 1009-1015, pi. 1). — Notes several species, some of which are new to science. 



Notes on the variation of the teleutospores of Puccinia windsoriee, J. A. 

 Warren (Amer. Nat., 32 (1898), No. 382, pp. 779-7S1, pi. 1).— The author reports col- 

 lecting this fungus on Muhlenbergia racemosa, and examinations of the material 

 showed the teleutospores as having 1 to 4 cells instead of the normal 2 cells. Other 

 variations are noted. 



Cracking of pears and apples (Gard. Chron., 3. ser., 14 (1898), No. 619, p. 641, figs. 

 3). — Descriptive notes are given of the injury due to Fusicladium dendriticum, and 2 

 or 3 applications of Bordeaux mixture are recommended as a preventive treatment. 



Potato scab, W. <i. Smith (Hard. Chron., 3. ser., 24 (1898), No. 621, p. 372).— In a 

 paper read before the Royal Horticultural Society the author described the potato 

 scab and commented upon the various assigned causes and the use of corrosive 

 sublimate, sulphur, and kainit as preventive measures. 



The gooseberry fungus, H. T. Soppitt (Gard. Chron., 3. ser., 24 (1898), No. 60S, p. 

 145, fig. 1). — The author describes JEcidium grostularice and mentions the discovery of 

 Klebahn, that the uredospore and teleutospore forms occur on Carex acuta and 

 C. goodenovli, the fungus being designated as Puccinia pringsheimiana. The author 

 reports experiments in which the spores were transferred from the gooseberry to 

 various species of Carex and, while no results were obtained on either Carexhirta 

 or C. leporina, the infected plants of C. goodenocii produced a promising crop of 

 teleutospores. 



A peony disease, G. Massee (Gard. Chron., 3. ser., 24 (1898), No. 607, pp. 124, 125, 

 fig. 1). — The author describes a disease caused by Botrytis sp., and as preventive 

 measures recommends the following: 



"Remove and burn all drooping stems the moment the first symptoms are observed. 

 Where the disease has previously existed, or better, under any circumstances, 

 remove the surface soil early in spring, and replace with fresh soil mixed with 

 quicklime. Do not use green manure as a top-dressing. The mycelium of the 

 fungus is not perennial in the root of the peony, so that it starts life perfectly free 

 from its enemy each year, and can only become diseased through inoculation from 

 sclerotia lying in the soil, from germs contained in manure, or from floating summer 

 spores borne from some diseased plant grown in the neighborhood." 



Stem rot of carnations, W. E. Britton (Amer. Florist, 14 (1898), No. 545, pp. 

 431, 432). — Brief notes are given of an attack of Fusarium sp. on the stems of carna- 

 tions, causing their rotting. The disease is not prevented by Bordeaux mixture and 

 seems liable to attack snapdragons and antirrhinums. The author for the preseut 

 recommends destroying all diseased plants and propagating only from healthy 

 stock. 



A disease of phlox, P. Nypels (Bid. Soc. Beige Micros., 24 (1897-98), pp. 123, 

 124). — Reports the occurrence of Tylenchus derastatrix. 



A disease of the La France rose, H. C. Haas (Eosen Ztg., 13 (1898), No. 5, pp. 

 80, 81). — A brief report is given upon a disease which has been noted for at least 

 four years on the La France rose. The author claims to have made a thorough 

 examination of the roots of the plant and found them sound, and thinks that the 

 disease is probably due to some fungus. The principal point of attack seems to be 

 at the crown of the plant. 



A monograph of the Peronosporaceae, A. N. Berlese (Biv. Pat. Veg., 7 (189S), 

 No. 1-4, pp. 19-37). — This is in continuation of a previous paper, and treats of the 

 life history of the mildews, means of combating them, systematic arrangement, etc. 



