572 EXPERIMENT STATION RECORD. 



to be badly diseased or dead, and were removed. The experiment Avas 

 eonduc-ted with soils consisting- of ooal ashes and peat and of compost. 

 The axerage mnnber of diseased plants was 4.3 and 3.4, respectivel}-, 

 for the 2 soils. 



From the fact that health}' plants, one after another, ])tH-ame diseased 

 in the benches, that coating them with fungicides did not pi-event 

 attacks, or removing diseased branches save any of the plants, the 

 author is led to believe that the fungus gains access to the tissues of 

 the host either through the rootlets or some portion of the root system 

 considerably below the surface of the soil, and Avhen the top begins to 

 wilt, the plant is already in the last stages of the disease. 



Some important fungi and fungicides, C. O. Townsend {Maryland Sta. Bid. 65, 

 jyp. 04-69, fi(i». 2) . — Popular def^criptioiiH are given of the causes of various plant dis- 

 eases and directions given for the preparation and application of fungicides for their 

 prevention. 



Experiments on club root (finger and toe) {Jour. U)dv. Extension Col., Reading 

 [EiKjlinid], Siqi. !i, moo, j>p. 47-52; uho Bd. Aijr. [Londoti] Rpt. Agr. Education and 

 Rcvcarcli, 1S99-1900, pp. 96-98). — An account is given of soil treatment with lime, 

 basic slag, caustic lime, chalk, and gas lime for the prevention of club root of cru- 

 ciferous plants. All the lime prei:)arations were found to give favorable results fmm 

 their use. 



The potato disease {Gard. Cliron., S. ser., 28 {1900), No. 717, pp. 222, 223).— 

 The writer reports a very serious outbreak of potato rot in Ireland whereby the croji 

 will be very materially lessened. Spraying was not practiced to any considerable 

 degree. 



Some tobacco diseases, J. F. Goutieke {Jour. Agr. I'rai., 1900, J, No. 16, pp. 

 569-571). — Notes are given on the injury done by the oroban(;he ( Phelipea ranio.^n) and 

 descriptions of the mosaic disease of tobacco. 



The smuts observed in Belgium during 1898, H. V^andekvht {Rev. Ghi. Agron. 

 Louvaiii, 9 {1900), No. 7, pp. 297-302). — A report is given of 48 species of smuts, 

 representing 10 genera, that have been observed in different parts of Belgium. The 

 distribution of these different smuts throughout the country is indicated. 



Smut of sugar cane, C. A. Barber {Dept. Land Records and Agr., Madra^s, Vol. II, 

 Bid. 39, pp. 155, 156, pi. 1 ) . — Notes are given on a serious outbreak of I'sfilago sacchari. 

 The smut is described and l)urning affected areas is recomm('n<led. 



Concerning the proper use of artificial fertilizers for sugar beets and the 

 relation with beet diseases, F. Kudelka {Bl. ZurkerrHdjcnbuu, 7 {1900), No. 8, pp. 

 113-121). 



Virescence and fasciation due to parasites, M. Molliard {Rev. G&n. Bot., 12 

 {1900), No. 140, pp. 323-327, fign. 3). — A case of virescence in Trifolium repens, due to 

 attacks of Polythrincium trifolii, and a fasciation of Raphanus raphanistrum are described 

 and figured. 



Investigations on Rhizoctonia violacea, M. (tuntz {Fi'ihling'.'i Landw. Ztg., 48 

 {1899), No. 19, pp. 731, 732; ahs. in Vmtbl. Bakt. n. I'm:, 2. Aht., 6 {1900), No. 15, pp. 

 506, 507). — In an alfalfa field which had been devastated by this root parasite, pota- 

 toes, Jerusalem artichokes, and bush beans were planted with the result that some 

 of each kind of plant were killed by the fungus. 



The genetic relationship between Roestelia koreaensis and Gymnosporan- 

 gium japonicum, M. Sni km (Z^r//r. PHaii:rntr<(idc., 10(1900), Nii.l,pp. 1-5, ph. 2). — 

 The relationship existing between these two fungi is shown by cultures ujjou Juiii- 

 perus and pear leaves. 



