DISEASES OF PLANTS. 455 



A disease of Antirrhinum, F. J. Chittenden {Jour. Roy. Hort. Soc. [Lon- 

 don], 35 {1909), No. 2, pp. 216, 217, fig. 1). — ^A description is given of a disease 

 of snapdragons due to Scptoria antirrhini. This appears to be the flrst report 

 of the occurrence of the fungus in Great Britain, but according to the author 

 the plants about Wisley Laboratory were severely attacked during the past 

 summer. It is believed that spraying with Bordeaux mixture or potassium 

 sulphid solution would protect the plants from attack. 



A Fusarium disease of the pansy, F. A. Wolf {Mycologia, 2 {1910), No. 1, 

 pp. 19-22, pi. 1). — The author states that for the past two seasons a stem and 

 root disease has been observed at Lincoln, Nebr., that has proved very 

 destructive. 



The disease is characterized by the sudden dying of the plants, and when 

 such a i>lant is pulled up a dark sunken area on the stem just at the surface 

 of the ground is apparent. The root system is destroyed, leaving only the main 

 roots. 



A study was made of some of the diseased material and a species of Fusarium 

 was found in all the material. This fungus was isolated and inoculations 

 made, producing the typical forms of the disease. The fungus, which appears 

 to have been hitherto unreported, is described as F. violw n. sp. 



Some fungi growing- both on coniferous and deciduous trees, L. Romell, 

 {Mycologia, 1 {1909), Ao. 6', pp. 2(Jo-267). — The author notes the occurrence on 

 ['in us abics of Da'dalca nnicolor, a fungus conmion on deciduous trees; PoJy- 

 porus sonatus and P. adustus on Swedish spruce; P. gigantcus on the oak and 

 on Pinus silvestris; Poly poms pinicola, which is commonly found on coniferous 

 trees, is reported on Cerasus, Alnus, and Betula ; Stereum fcrrugincum on the 

 oak and pine, etc. 



Some diseases of tree seeds, F. \V. Neger {Tharand. Forstl. Jahrh.. GO 

 (1909), pp. 222-252, figs. J/). — A study is reported on some of the causes of 

 sterility in tree seeds and a number of fungi found in seeds are described. 

 Among the fungi Urocysiis italica was found to be more or less destructive to 

 acorns, chestnuts, and the seeds of white fir. In addition to Urocystis a second 

 fungus was found in the fir seed, and the systematic relationship of the two 

 fungi is discussed. In conclusion the author briefly describes a disease of the 

 seed of the horse-cliestnut. 



Disease of chestnut trees {Prog. Agr. y Pccuario, 15 {1909), No. 651, pp. 

 613, 67.'/). — A synopsis is given of the report of a commission appointed to 

 investigate a serious disease of chestnut trees in northern aiid northeastern 

 Spain. 



The cambium of the diseased trees shows a marked discoloration, the young 

 shoots are pale, and the leaves chlorotic. The disease is believed to have been 

 present in Spain for many years, but only recently has it become serious. Its 

 cause was not definitely determined, but the trees appear to be attacked through 

 their roots. The establishment of stations for the study of the problems con- 

 nected with the disease is advised. 



Some fungus parasites of Phylloxera, P. Baccarini {Bui. ^oc. Bot. Ital., 

 1908, No. 1-3, pp. 10-16, fig. 1) . — Notes are given on a number of fungi culti- 

 vated from the bodies of phylloxera, and among them the author recognizes 

 species of Phoma, Alternaria, Macrosporium, Cladosporium, and Penicillium. 



Bordeaux spraying, S. U. Pickering {Jour. Agr. Sci., 3 {1909), No. 2, pp. 

 171-178, dgm. 1). — The author gives an account of some of the changes ob- 

 served to occur in Bordeaux mixture during its use.. 



He states that when lime is added to copper sulphate, different basic sul- 

 phates are formed, depending on the proportions taken, and that when sprayed 

 on plants these are decomposed by the carbon dioxid in the air, forming cop- 



