DISEASES OF PLANTS. 141 



tion and use of some of tlie more common fungicides and insecticides, 

 as well as notes on some forms of spraying apparatus. Analyses arc 

 given ot" what is called "New Process" Paris green, wliicli is sliown to 

 be not Paris green, but a mixture of lime, arsenious acid, and copper 

 oxid. The substance varies in its constitution, the limits being arseni- 

 ous Jicid 58 to 63 per cent, lime 14 to 16 per cent, and copper oxid 3 to 

 4 per cent. The use of this substance is not to be advised Avithout a 

 careful trial, as it is reported as injurious to many plants. 

 A spraying calendar for the year is given. 



The rots of sugar beets (Fiihlinc/'s Jaiidw. Ztg., 45 {1S96), No. 15, p. 4S1). 



On combating the heart and dry rots of beets, Frank {Deut. landw. Presse, 23 

 {1S9G), No. 64, jyp. SOS, 569). 



A new melon disease, M. C. Cooke (Gard. Chron., ser. 3, 20 {1896), No. 506, pp. 

 271, 272). — A new fungus disease is reported on leaves of melons, and it is thought 

 possilily to be due to Cercospora cifrnUina, or, mny be, to a new species. 



The rotting of turnips and Swedes, M. C. Pottkr {Jour. [BrUish^ Board. Agr., 

 1S06, No. 2, pp. 120-131, pis. 4). — Notes are given of attacks of Botrytis on stored 

 turnips and Svredes. 



An American potato disease in Europe, C. Sa.jo {Fiihling's landw. ZUj., 45 {1S9G), 

 No. 15, pp. 4SS-491). 



American blight {Gard. Chron., ser. 3, 20 {1S9G), No. 506, p. 576).— Hydrochloric 

 acid luixcd with clay or cow dnng and applied with a paint brnsh is said to bo a 

 specific agaiiist blight of fruit trees. Care must be used in applying the mixture on 

 account of the well-known corrosive action of the acid on plants. 



A new smut on Panicum crus-galli, P. Magnus {Ber. deut. lot. Ges., 14 {1S9G), 

 No. 6, pp. 216-221, pi. 1). — Chitractia seymouriana is figured and described from 

 material communicated from North America. 



The brown rust of peaches and its treatment, J. Tachaires {Prog. Agr. et Fit., 

 26 {1S9G), No. 31, pp. 132-134). — Descriptions of the disease are given, and 3 formulas 

 of solutions of copper and iron sulphates are recommended as treatments. 



Contagiousness and prophylaxis of the tubercle disease of the vhie, F. Latase 

 {Compt. Pcnd., 123 {1S96), No. 3, pp. 200-202; Bev. Scient., sn: 4, 6 {1S96), No. 5, p. 152). 



On the inelHcacy of copper salts for controlling black rot, L. Degrully 

 {Prog. Agr. et Tit., 26 {1S9G), No. 32, p. 143). 



Treatment of black rot, J. Perkaud {Le Iraiiement du Mack rot daus les vignohlcs 

 dn centre ct de Vest. Macon and ViUefranche: 1S96, pp. 64). 



Observations on the prevention of black rot of grapes, A. de L'Ecluse {Ftudcs 

 et observations sur le traiiemvnt integral de la rigne contre le black rot, etc. Agen: Qnil- 

 lot, lS96,pp. XVI, 80). 



A report on field experiments for the prevention of black rot, G. Couderc 

 {Prog. Agr. et Fit., 26 {1SD6), No. 35, pp. 232-239). 



Means for combating grape mildew, L. Anderlind {Allg. Wcinztg., 1896, p. 649). 



On the treatment of mildew by dilute solutions of copper sulphate, E. Per- 

 RiER DE LA Bathie {Prog. Agr. et Fit., 26 {1896), No. 30, pp. 103, 104).— '^otes are 

 given on the successful employment of very dilute solutions of copper sulphate in 

 preventing grape mildew. 



Oidium, anthracnose, and mildew, G. Battaxchon {Prog. Agr. et Fit., 26 {1896), 

 No. 32, pp. 147-140). 



On the application of sulphur during the flov/<3ring period, H. Devatix {Prog. 

 Agr.et Fit., 26 {1896), No. 32, pp. 158-l(;i, figs. 3). — The author claims that applica- 

 tions of sulphurjjjuring the flowering period of grapes have no injurious effect. 



Rassiguier's treatment for chlorosis of grapevines, A. Menudier {Jour. Agr, 

 Prat., 60 {1886), II, No. 31, pp. 157, 158). 



