DISEASES OF PLANTS. 451 



lo:if spot {('crcosponi lunfi'ipcH). ring spot (hci)t()s)thiiri(i Hdcchari). mid sooly 

 mold (Capiiodiinn sp.)- Of these diseases the red r«>t or red snuit is by Imi- tlic 

 most destructive. The autlior believes this disease is < ai'ricd in tlie nia.jdrity of 

 cases liy cane cuttiii.Ks tliat are i)lanted. 'The sel(>(ii(>ii of sound cane and of 

 resistant vai'ieties, the destructi(ni of diseased material, and the avoiding of 

 ratooning are recommended as possible means of control. 



In iuldition to the above, brief notes are sjiven on a mnnber of oUkm- diseases 

 that are not conunon or are as yet inu'ei)orted from r.eiiKal. althoujih iirobably 

 e.xistiuL,' there or liable to introduction. 



Gumming of the sugar cane, N. A. Coisi! {Hnirail. I'laiitcrs' Mo.. 2.7 (tOOG), 

 \(>s. t. jip. I.i-.i(i. /i(/x. Ill; .>. PI). .17- US, fi(/s. 2). — This is a reprint of Hawaiian 

 Supir rianters' Station. Division of I'atholo.ii.v and I'hysiolos.v F>ulletin ;'. (E. S. 

 K.. 17. p. T7S). 



Preliminary notes on root diseases of sugar cane in Hawaii, L. L. Brain 

 (Hairdii. /'hi liters' .l/o.. 2J {lOOa). .Vo.s'. ,i, pj). 10J,-12L fi(/s. II: '/. PI). lo3-lG6, 

 Jul. 1). — This is a rei)rint of Hawaiian Su^ar Planters' Station. Division of 

 I'athology and Physiolo.try Bulletin 2 (E. S. II.. 17. p. 77.S). 



Pear blight, F. 'SI. Rolfs (Missouri Fruit Sta. Circ. 3, pp. 4)- — Attention is 

 called to the bacterial blijiht of pears. The life history of the organism and 

 mode of infection are described and methods of treatment su,l,^i?ested. 



The use of Bordeaux mixture for the control of Cycloconium on the olive, 

 O. ToBLER and U. Rossi-Ferrini {Atti R. Accad. Econ. Agr. Georg. Firensc, 5. 

 yrr.. 3 (190()), Xo. 3a, pp. 327-337). — The results of a series of experiments in 

 spraying olive trees for the prevention of attacks of Cycloconium oleai/iiiiiiii are 

 given, which show that while in general the appearance of the tree is improved 

 by tlie use of the fungicide, yet mai'ked differences are to be noted in the effect 

 on the yield of different varieties. The exi)eriments cover a period of ?> years 

 with a number of varieties, and the results are tabulated. 



Treatment for fumagine of olive, D. Vidal [Profi. Agr. et Tit. (Ed. VEst), 

 27 (Hioii). \(). 'i3. jip. ■')()'.)-') ir>). — An acccmnt is .given of experiments that have 

 been carried over a number of years for the prevention of fumagine of olives, 

 and the author states that the most efiicient treatment is one that is directed 

 against both the fungus and the insect which it follows. 



Spraying the trees with Bordeaux mixture to which either turpentini' or a 

 resin soap mixture was added gave splendid results. \Yhere a tobacco decoction 

 was added to the Bordeaux mixture the results obtained win'e less favorabh^ 



In general, a Bordeaux nuxture containijig 2 per cent copper suliihate is pre- 

 ferred, and the turp(>ntine maj' be poured into the in'e])aration. after which it 

 is to be vigonmsly stirred. The annual or biennial ])runing of the trees facil- 

 itates the preventive treatment, and it is thought that by continuing it for ."> or 

 (■- years olive orchards could be cleared of these pests. 



Notes on gooseberry mildews, E. S. Salmon {(lard. Vhroii.. 3. scr., //O (IflOG). 

 No. 103',. p. 2'.).'i). — Tlu> occin-rence of the Euroj)ean gooseberry mildew (Micro- 

 splifcrn grossuUiria) on red currants is noted, this fungus having heretofore 

 been reported in Europe as attacking only gooseberries. Attention is also called 

 to the fact that the American gooseberry mildew (Sphfrrotheca viors-uvfr) has 

 been reported during the present season as occurring on red currants in Irel.-nid 

 and in Denm.-irk. 



For the prevention of in.iury by these fungi siir.-iying with ])otassium snljihid 

 is reconnnended. 



American mildew in Sweden {Gard. Chron., 3. scr., JfO (1906), A'o. 1033, 

 p. 262). — .Vn account is given of means which have been adopted in Sweden to 

 exter'uinate the gooseberry mildew (i<pli(rrotlicva murs-uva). The minister of 



