966 EXPERIMENT STATION RECORD. 



lie concludes that thi;^ disease is caused l)y three specitic organisms. In tlie Caucasus 

 region it is due to (riii(j)i(tr<Jia hacca', while in France it is caused hy G. bidmiUi. In 

 (reniiany and Switzerland he has not been able to find either of the^e fungi, and 

 thinks doubtless that the disease is due to a third species. An interesting j)oint 

 brought out in the investigation is that the general characteristics of the fungi are 

 alike, and in jiractice the same treatment applies to all. 



On the occurrence of Peronospora on flowers and young fruit of grapes, 

 MtJLi,EK-THrKGAr(/a/i7-esfeer. Vers. Stat.u. Schule, Wadensu-eil, 1897-98, pp. 101-lOS).— 

 The author reports having observed the presence of Peronospora upon the flowers 

 and newly formed fruits of grapes. These appeared before the usual time for the 

 first spraying, and the author believes that means should be taken for the destruc- 

 tion of the Peronospora, so that the winter spores may not l)e carried over to infect 

 the plants in the spring. 



Combating Oidium and Peronospora, Kclisch {Landir. ZtscJir. Ehatis-Lothrln- 

 (jni, 1900, X(js. Jl, pp. 294, -9.5; 22, pp. 307, 308). 



Combating Oidium, ,1. Behrens ( Wchnhl. Lnndv. Ver. Baden, 1900, Xo. 11, pp. 

 144, 14-5). 



Investigations on the forms of sulphur used in viticulture, C. Dusserre 

 {Ann. Agr. Suisse, 1 {1900), No. 9, pp. 321, 330). — An account is given of investiga- 

 tions of different forms of sulphur used for the prevention of grape oidium. The 

 usual forms are sublime and triturated. A tliird form which recently appeared on 

 the niarket is known as aerated sulphur. The physical condition of these different 

 kinds was investigated at considerable length and is reported upon. 



Recent investigations on diseases of tropical economic plants {YAsclir. 

 PjiunzeiikranJ:., 10 (1900), Xo. o, pp. 288-292). — Brief notes are given, in whichanuni. 

 ber of diseases and in.sects of economic plants of the tropics are described, together 

 with means that have been adopted for their destruction. The host plants mentioned 

 are coffee, tea, cacao, sugarcane, sorghum, vanilla, St. John's bread, cocoanut palm, 

 caoutchouc, ramie, and grapes. 



Tlie parasitism of Ximenia americana, E. Meckel ( Compt. Rend. Acad. Sci. 

 Paris, 131 {1900), Xo. 19, pp. 764, 765).— The results of some experiments on the 

 part of the author to infect a number of trees with this parasite are given. It was 

 found that it was parasitic only on Ficvs laurifolia. 



Concerning the parasitism of Botryosporium, V. Pegliox {Staz. Sper. Agr. 

 ItaL, 33 (1900), Xo. 6, j)j). r>S.'>-.',89) . 



A fungus disease of Casuarina, A. vox Jaczewski {Ztsclir. Pflanzenkrank., 10 

 {1900), Xo. 3-4, pp. 146-148, fig- !)■ — A brief account is given of an attack of Botri/o- 

 .tjjoriwn diffusum on the twigs of Casuarina leptodada. The fungus, which is usuallj' 

 a saprophyte, occurs here as a parasite, and its method of growth is described. 



Carnation-stem rot, F. W. Card and G. E. Auams {Rhode Island Sta. Rpt. 1900, 

 pp. 249-2.51). — Ex])erinients begun in 1899 (E. S. R., 12, p. 763) were continued. 

 The principal point under consideration is a comparison of the effect of chemical v. 

 stable manure as a fertilizer for these plants. The statement in the previous report 

 is reaffirmed that new, clean sand bearing no trace of disease, and the use of soil in 

 which carnations have not previously been grown, are the most important conditions 

 to Vje secured. The exjieriments so far do not bear out the prevalent opinion that 

 stable manure favors the spread of disease. 



ENTOMOLOGY. 



Foul brood of bees, F. C Makkisox ( ( 'oithl. B<ikt. u. Par. ^2. AM., 

 G {IDIJO). ^'(>.^. l.J, j>j>. J^;U-Jt,i7; lJ4.,pj>. kf)! -1^9, Jigs. J^; 15, j^p. Jf^Hl- 

 )f9G; 16,2U>- 51S-517). — The author presents a critical review of the 

 literature of foul brood in connection with :i bibliog-ra])hy of 80 titles. 



