DISEASES OF PLANTS. 971 



Report of the biologist, P. H. Rolfs (Florida Sta. Rpt. 1S9S, pp. 27-36).— The 

 work in botany for the year is briefly reviewed and notes given on a number of impor- 

 tant plant diseases. The fungus tomato blight is briefly discussed, a more extended 

 description and discussion having been given in Bulletin 21 of the station (E. S. K., 

 5, p. 790). The bacterial tomato blight and tomato rust are also described. Notes 

 are given on the fungus disease of the San Jose scale, a detailed account having 

 been previously published in Bulletin 41 of the station (E. S. R., 9, 1068). Celery 

 blight, due to Cercospora apii. and the pear blight or twig blight are described, and 

 preventive measures suggested. 



Diseases of cultivated plants in Cyprus, P. G. Gennadius (/tyf. Agr. Cyprus, 

 III, p. 51; abs. in Ztsehr. Pflanzenkranh., 8 (1898), No. 5, pp. ..'Sl-.'S.'!).— Notes are 

 given on diseases of grapes, citrus fruits, olives, apple trees, and cereals. A brief 

 report is given on the destruction of Orobanche and Euphorbias. The lirst plant, 

 it is said, may be destroyed by applications of potash and phosphate fertilizers, also 

 5 per cent solutions of copper sulphate will destroy Orobanche seeds. The Euphor- 

 bias, it is said, may be destroyed with carbon bisulphid, or with petroleum mixed 

 in fertilizers. 



Diseases of sugar cane in the Antilles, G. Saussine (Bui. Agr. Martinique, 

 1S9S, No. 2, pp. 41-53). — Notes are given on Alectra brasiliensis, a saprophytic phanero- 

 gam, 2 cryptogams (IHchosphcera sacchari and Colletotrichum falcatum), and several 

 diseases of unknown origin. 



Fungus diseases of the grapevine, Allen, Blunno, Froggatt, and Guthrie 

 (Agr. Gaz. Neiv South Wales, 10 (1899), No. l,pp. 26-31). — Notes are given on a number 

 of diseases of the grape, with suggestions for their prevention. 



Black rot of grapes and its treatment, G. D'Utra (Bol. Inst. Agron. Sao Paulo, 

 9 (1898), No. 6, pp. 26S-271). 



The treatment of pourridie L. Rougier (Prog. Agr. et Fit. (ed L'est), 20(1899), 

 No. 11, pp. 327-333). — Carbon bisulphid is said to be the most efficient means for pre- 

 venting the destruction of grapevines by Dematophora necatrix. 



On the use of carbon bisulphid against Dematophora necatrix, J. Dufour 

 (Chron. Agr. Cant. Yaud, 12 (1899), No. 4,pp. 87-90). — Notes the very successful use of 

 this fungicide against this pest. 



Monilia variabilis, P. Lindner ( Wchnsehr. Bran., 15 (1898), No. 16; abs. in Bot. 

 Centbl.,77 (1899), No. 2, pp. 67,68). — A variable new species is described which was 

 found growing upon white bread that had been moistened with beer yeast. 



The chrysanthemum rust, L. Wittmarck (Gartenflora, 47 (1898), No. 23, pp. 625, 

 626, fig. 1). — Notes are given on Puccinia hierocii. 



Tea blights, G. A. Massee (Kew Misc. Bui. 138, pp. 105-122, pi. 1).— The author 

 describes the attack on tea of Pestalozzia guepini, Exobasidium vexans, and Stilbum 

 nan um. The first species is also parasitic on rhododendron, citrus, magnolia, etc. 



Mildew of hops, L. Mangin (Jour. Agr. Prat., 1899, 1, No. 10, pp. 345-347, fig. 1).— 

 Notes are given on Sphcerotheca castagnei. 



A pestalozzia disease of lupines, F. Wagner and P. Sorauer (Ztsehr. Pflan- 

 zenkrank., 8 (1898), No. 5, pp. 266-271, pi. 1).—The authors describe a very destructive 

 disease of lupines, which is said to be caused by Pestalozzia lupinii, n. sp. Different 

 species of lupines seem to vary in degree of susceptibility to the disease, Lupinus 

 cruikshanksii and L. mutabilis being quite susceptible, while L. albus and /.. luteus are 

 less so. In cultivating these plants to avoid the disease care should be taken in the 

 selection of varieties, and the soil should not be allowed to become too wet. 



The mycocecidia of Rcestelia, L. Geneau de Lamarliere (Rev. Gen. Bot, 10 

 (1898), No. 114, pp. 225-237; 115, pp. 273-288, pis. 2, figs. 5). 



An undescribed disease of peonies and lily of the valley. J. Ritzema-Bos 

 (Ztsehr. Pflanzenkrank., 8 (1898), No. 5, pp. 263-266).— The author describes diseases of 

 the peony and lily of the valley which are said to be caused by Botrytis paonice. On 

 both plants it has proved quite destructive. Experiments were made on Couvallaria 



