150 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Potato-spraying Experiments. By E, S. Salmon and H. Wormwald 

 (Jour. Bd. Agr. vol. xxvi. No. i, April 1919). — An account of potato-spraying 

 experiments conducted at the East Mailing Fruit Experiment Station. Bor- 

 deaux and Burgundy mixtures were used, of two strengths, viz. (i) containing 

 1 p.c. copper sulphate, and (ii) 1-4 p.c, copper sulphate. ' British Queen ' was 

 the variety sprayed. 



The authors summarize the results as follows : — (i) Under certain seasonal 

 conditions one application of Bordeaux or Burgundy mixture to a second early 

 variety of potatos may result in loss owing to the spraying lengthening the 

 period of ripening while not protecting the crop from attacks of blight, 

 (ii) Under the same seasonal conditions as referred to above, two sprayings 

 with either Bordeaux or Burgundy mixture resulted in an increase of 2§ tons 

 and i\ ton, respectively, of sound tubers to the acre. — G. C. G. 



Potato Storage and Storage Houses. By William Stuart [U.S.A. Dep. 

 Agr,, Farm. Bull. 847, July 1917 ; 20 figs.). — Good storage is a vital factor in 

 maintaining the vigour of seed stock. Its value is not yet properly recognized 

 by the grower. Thorough aeration of the stored tubers and exclusion of light 

 are essential for the best preservation of stock. 



Careful investigations during several seasons have clearly demonstrated 

 that losses in storage can be largely prevented by the proper construction and 

 management of storage houses. 



With high prices and scarcity of supply, the need of conserving the entire 

 production for seed and food purposes is essential. — V. G, J t 



Primula anisodora Balf. f. et Forr. By J. Hutchinson (Bot. Mag. t. 8752 ; 

 1918). — Native of Yunnan. A striking Primula of the Candelabra section, 

 discovered by Mr. G. Forrest. It has proved hardy in a sheltered nook and 

 attains a height of about 3 feet. The flowers, which are borne in a terminal umbel, 

 are of a deep purple, almost black colour, with a yellow eye, and all parts of the 

 plant when fresh are strongly aromatic, the odour resembling that of aniseed. 

 The leaves are oblong-oblanceolate from 6 to 8 inches long. Like many other 

 species, P. anisodora dies after flowering freely, but produces an abundant 

 supply of good seeds. — L. C. E. 



Primula sinopurpurea Balf . f. By J. Hutchinson (Bot. Mag. t. 8777; 1918). 

 — Native of Yunnan. A hardy Primula for the rock garden, growing well in 

 half shade, and must be treated as a biennial. It is closely allied to P. nivalis, 

 but differs in its more remotely repand-denticulate leaves, conspicuously farinose 

 on the under side. The flowers are deep violet about if inches across. — L. C. E. 



Primula sylvicola Hort. By J. Hutchinson (Bot. Mag.t. 8762, 1918). — Native 

 of Yunnan. A handsome Primula closely allied to P. sino-mollis Balf. f. et 

 Forr., from which it differs in its much shorter corolla-tube which scarcely 

 protrudes beyond the tips of the calyx lobes. P. sylvicola is too tender to be 

 grown out of doors and does best when treated as a biennial. The flower spikes 

 reach a height of about 2 feet and the plants remain in flower for about three 

 months in spring. The flowers are rose-purple in colour. — L. C. E. 



Pteridophyllum racemosum Sieb. By O. Stapf (Bot. Mag. t. 8743; 1918). 

 — Papaveraceae. Native of Japan. A hardy perennial plant ; although mainly 

 of botanical interest, its foliage renders it quite worthy of a place in the Rock 

 Garden. The leaves form a rosette, they are 2\-6 ins. long, unevenly pectinately 

 pinnatisect. Plants grown in a frame keep their leaves throughout the winter, 

 but those grown outside lose their leaves. Inflorescence racemose, flowers 

 small, white. — L. C. E. 



Radish Maggot, The. By P. J. Parrott and H. Glasgow (U.S.A. Dep. 

 Agr., New York Agr. Exp. Stn. y Bull. 442, Nov. 1917; 8 plates, 2 figs.). — The 

 radish or cabbage maggot (Phorbia brassicae Bouche) dwarfs and destroys early 

 cabbage ; attacks seedlings of late cabbage, and causes maggoty radishes. 

 It is a common pest, and varies in importance from year to year. During some 

 seasons it is very destructive. 



Practical measures for production of radishes that are largely exempt from 

 insect attack are early sowing and growing of plants in frames screened with 

 cheesecloth. — V. G. J. 



Ramondia serbica Pancic. By S. A. Skan (Bot. Mag. t. 8765; 1918). — 

 Native of Serbia. A pretty plant for the rock garden, bearing a close general 

 resemblance to R. pyrenaica, but its flowers are not quite so large, neither is 



