DISEASES OF PLANTS. 573 



Note on Glceosporium. cactorum, J. F. Clakk (Amrr. Florist, J.~> [I'.ion), Xo. 67/, 

 Itp. 841, 842, Jig. 1). — Notes the occurrence of thin fungus on a number df sjiccies of 

 cacti. 



Fruit diseases and how to treat them, L. C. C'oebe'it ( West Virginia Sta. Bid. 

 G(J, }>]>. lf)D-,2o5, Jigs. 2.>). — A nunil)er of the more common fruit diseases are popularly 

 described and suggestions given for their prevention. A spray calendar is given for 

 jireventive treatment of the diseases of the apple, cherry, currant, grape, nursery 

 stock, peach, apricot, nectarine, pear, plum, raspberry, blackberry, and strawberry. 

 Formulas and directions for making insecticides and fungicides complete the bulletin. 



The destruction of pear rust, C. Freiherr von Tubeuf {Arh. K. Gesundheit- 

 saiiitc, Biol. Aht., Leajhi ^i, Aj>r., 1900, pp. 4, Jigs. 5). 



American gooseberry mildew in Ireland, G. Massee {Gard. Citron., 3. ser., 28 

 {1900), No. 7 IS, p. 143, Jig. 1). — Notes the appearance of Sphnrotiieca mors-v.rx in Ire- 

 land and recommends spraying with a solution of potassium sulphid for preventing 

 its attack. 



Currant leaf spot, Weiss {Prnkt. Bl. Pjlanzensdmtz, 3 {1900), Xo. 1, pp. 1-3). — 

 Notes on Glcvosjxn'iinn ribis and means for its prevention. 



Banana disease {Trinidad Bot. Depi. Bid. Misc. InJ'orm., 1900, No. 24, p. 254). — 

 Notes the destructive occurrence of Marasmus semiustus on banana plants. Experi- 

 ments show that under good cultural conditions the fungus lives as a saprophyte, 

 l)ecoraing destructive when the plants are weakened from any cause. 



The diseases and enemies of coffee, G. Delacroix {Les maladies et. les ennemis 

 des cajeiers. Paris: Challamel, 1900, 2. ed. enl., pp. 216, Jigs. SO). 



The black rot in Jura during 1899, F. Jouvet ( ^'lgne Amer. et Viticitlt. Europe, 

 24 {1900), No. 5, p]). 146-149). — Outbreaks of black rot were observed June 5 or 6, 

 followed by second, third, and fourth appearances June 10 to 12, July 28 to 31, and 

 August 5 to 7. Spraying experiments were conducted in which the best results were 

 obtained from 5 applications of Bordeaux mixture. The addition of resin was with- 

 out value, as shown by the results. 



Notes on oidium in Burgundy, P. Pacottet {Rev. Vii. , 1900, No. 332, pp. 473-476), 



The prevention of Oidium tuckeri, J. Wortmann {Mitt. Weinbau u. Kellerw., 

 1900, No. 1, pp. 1-6; ahs. in Centhl. Bakt. u. Par., 2. Aht., 6 {1900), No. 9, pp. 301, 302).— 

 Notes the serious occurrence of this mildew in 1899. Investigations lead to the belief 

 that it is wintered over in the bark of the vine. Sulphur is recommended as a pre- 

 ventive means. 



Combating oidium on grapes, Kulisch {Landw. Ztschr. Elsass-Lothringen, 1900, 

 No. 17, pp. 238, 239). 



Diseases of plants, E. Hartki {Lehrbuch der Pflanzenlranklieiten. Berlin: J. 

 Springer, 1900, pp. IX-^290; noted inAllg. Forst u. Jagd Ztg., 76 {1900), June, pp. 205, 

 206). — A third and revised edition of "The diseases of trees." 



Fungus diseases of shade trees, W. Lockhead and M. W. Doherty {C'anad. 

 Hort., 23 {1900), No. 4-,pp- 133-141, Jigs. 12). — Notes are given on tree-root rot {Agari- 

 cusmelleus), root rot of conifers {Trametes radiciperda), heartwood rots {Polyporus 

 sidphureus, P. betulinus, etc.), apple-tree canker {Nectria ditissima), spruce canker {N. 

 cucurbitida) , coral spot canker (A^. cinnabarina) , larch canker {Peziza uillkomii) , pine 

 tree fungus ( Trametes pini), pine cone fungus {Peridermium jyini) , cedar apples ( Gym- 

 nosporangium sp. and Ea'stelia sp. ), lichens, maple-leaf blotch {Rhytisnia arerinuni), 

 and pine-leaf cast {Loijhoderniinm pinastri) , together with suggestions for iireventing 

 injurious attacks upon their hosts. 



Notes on the Peridermium of Pinus strobus {Bui. Soc. Cent. Forst. Belg., 7 

 {1900), No. 8, p>p. 577-579). — This fungus is said to have spread rapidly through the 

 forests of Belgium during the past 2 or 3 years and is becoming a serious enemy to 

 the plantations of white pine. The different forms of the fungus, one of whicli grows 

 on pines and the other upon species of Ribes, are described. It is said that the Peri- 



