NOTES AND ABSTRACTS. 



181 



Veronica, Parasite Of (Lc Jardin, vol. xx. No. 472, p. 318 ; Oct. 20, 

 1906). — Septoria exotica, a new cryptogamic parasite recorded from the 

 Argentine Republic, Italy, Berlin, and Moravia, where it has caused great 

 ravages. It forms greyish-white spots, bearing black sporangia. The 

 leaves attacked curl up and drop off till the plant is almost defoliated. 

 Treat with ammonia solution, adding crystals of soda. — F. A. W. 



Vervain. By Le Texnier (Lc Jardin, vol. xx. No. 471, p. 301 ; 

 October 5, 1906). — Historical article, enumerating all the varieties of this 

 plant.— F. A. W. 



Vine Culture, Houses for. By Numa Schneider (Rev. Hort. 

 April 16, 1906, pp. 185-189 ; 7 figs.). — -A very interesting article cn 

 various types of vineries with details of their construction and arrange- 

 ments. — C. T. D. 



Violet, Cultivation of, at Hy&res. By E. Tschaen (Rev. Hort. 

 August 1, 1906, pp. 353-355 ; 4 figs.). — A very interesting descrip- 

 tion of the method of growing violets for the market at Hyeres, on 

 ridges affording some protection, and in conjunction with vegetables. 



C.T. D. 



VitiS Voinieriana. By H. Martinet (Lc Jardin, vol. xx. No. 465, 

 p. 200 ; 3 figs. ; July 5, 1906). — A plea for Vitis Voinieriana, introduced 

 in 1889 from China, as a free-growing and vigorous greenhouse climber. 

 A note on p. 239, No. 467, by Dybowski, director of the Colonial Garden, 

 Nogent-sur-Marne, points out that this plant should, properly speaking, 

 be called Cissus Voinieriana Yiala. — F. A. W. 



Walnut Blight. By R. E. Smith (U.S.A. Exp. Sin. California, 

 Bull. 184 ; 3 figs. ; January 1907). — This disease, which is at present 

 restricted to the Pacific coast, is due to the attack of a bacterium called 

 Pscudomonas juglandis. The disease is characterised by black, cankered 

 spots on the young nuts, causing them to fall prematurely or spoiling the 

 kernel. Similar spots appear on the youngest, green, new shoots, but do 

 not continue down the twig. In bad years, however, a large portion of 

 the terminal twigs are destroyed by this means, and with them the next 

 year's crop. Spraying with Bordeaux mixture greatly diminishes the 

 loss, but the cost is almost prohibitive. Immune varieties are feasible 

 and are to be sought.— F. J. C. 



Walnut Trees in Oregon. By C. J. Lewis (U.S.A. Exp. Stn. 



Oregon, Bull. 92 ; 23 plates ; December 19, 1906).— Walnut-growing 

 appears to be becoming an important industry in Oregon, and the 

 present bulletin gives an account of the propagation and treatment of 

 the trees and of the harvesting and marketing of the nuts. The " Cali- 

 fornian growers believe that the beating of the trees does more harm than 

 good, as it often seems to knock off a great many buds." The late- 

 flowering French varieties, ' Mayette ' and 1 Franquette,' are the ones 

 most generally grown. It is interesting to note that in 1905 the United 

 States imported over 20,000,000 lb. of walnuts.— F. J. C. 



