954 JOUKNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Onion Growing- (U.S.A. Exp. Stn. Texas, Bull. 60; 6/1901; 6 

 figs., 5 plates). — Gives an account of horse t?ers?<s hand culture in growing 

 Onions for market, and reports in favour of the latter. — F. J. C. 



Onion Smut. By Sirrine and Stewart {U.S.A. Exp. Stn., Neiv 

 York, Bull. 182, ; 12/1900). — Gives an account of the result of treating 

 the soil in which Onions are sown with sulphur-lime, as a preventive of 

 the attacks of the fungus Urocystis cepulce, and recommends the same 

 for bad attacks. The best remedial measure is, how^ever, transplanting. 



F.J. C. 



Onion Thrip. By Prof. Webster, Ohio {Amer. Gard. xxii. pp. 776, 

 777, fig. 162; 16/11/1901). — A troublesome pest in America, which 

 attacks a large number of distinct plants, including the Onion, Leek, 

 Tobacco, Tomato, Wheat, Cabbage, Turnip, Cucumber, and many grasses. 

 It is commonly known as the " White Blast," and is difficult to control 

 on account of its prevalence among a variety of weeds. Of the many 

 remedies tried, a spray mixture of 1 lb. of " Standard " soap dissolved in 

 8 gallons of water gave the best result. — C. C. H. 



Onions and Leeks.— By H. Roberts (Oard. Mag. 2,513, p. 861 ; 

 28/12/1901). — The writer gives some interesting historical notes on the 

 Onion and Leek, together with poetical allusions to these common 

 vegetables. Some sensible remarks on the cookery of both Onions and 

 Leeks may be useful to many. — W. G. 



Opuntias, Out-door. By R. I .Lynch {Go,rd. Chron. No. 780, p. 408, 

 figs. 122 and 128, December 7, 1901). — Descriptions and figures are 

 given of three species that are grown out of doors at Cambridge, with 

 only very slight protection in the coldest weather. — G. S. S. 



Orchard Notes. By W. J. Allen (Agr. Gaz. N.S.W. p. 1,172, 

 September 1901 ; p. 1,278, October 1901 ; p. 1,441, November 1901).— 

 Valuable information regarding the treatment of orchard trees, together 

 with coloured plates of Fox's Seedling and Globe Peaches, La Comte 

 and Beurre Clairgeau Pears, and Lamb Abbey Pearmain and Jonathan 

 Apples. — A. W. S. 



Orchid, A new Parasitic Fungus on an (Gartenflom, p. 532 ; 

 1/10/1901). — A new species of Nectria (Nectria hulhicola, P. Henn.) 

 was discovered to be the cause of damage to the tubers of Maxillaria 

 rufescens, Lindl. The leaves of the affected plants fall off, and brown 

 spots appear on the tubers ; the diseased spots soon extend, and the 

 tubers finally decay. 



Three or four species of Nectria are already known upon Orchids, but 

 their conidia and ascospores differ from those of the species now 

 described. 



The perithecia of the fungus appear to be formed chiefly during the 

 dull weather of winter. Bright sunlight checks the disease somewhat, 

 but all diseased tubers and associated roots should be carefully removed 

 as soon as the complaint is observed. — /. P. 



