770 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



The crop is subject to the attacks of all the usual Brassica 

 pests and diseases, and the author describes the remedies and preven- 

 tive measures in vogue. Hellebore and Pyrethrum powders are found 

 to be more effective than liquid sprays for combating caterpillars, 

 and the former mixed with water at the rate of 2 oz. to the gallon has 

 proved a perfect remedy for the cabbage maggot (Pegomyia brassicae, 

 Bouche) when applied to the soil at the base of the plants. — V. G. J. 



Celery Blight (Septoria Petroselini var. Apii). By E. S. Salmon 

 (Gard, Chron. June 21, 1913, p. 414 ; I fig.). Description of appearance, 

 history of, in this country, and recommendation of spraying with 

 Bordeaux mixture in June, July, and August, or dipping young plants 

 in it when planting. — E. A. B. 



Celery, Cultivation of. By E. Beckett (Jour. Bd. Agr., vol. 

 xx. No. 9, pp. 793-796). — The cultivation of Celery as practised in 

 private gardens is described. — A. S. 



Centaurea crassifolia (Bot. Mag. tab. 8508). — Family Com- 

 posiiae, tribe Cynaroideae. Malta. Under-shrub, 2 feet high. Leaves 

 long, spathulate, fleshy. Heads ternate-quaternate 2 inches wide on 

 long branches. Flowers purple, rarely rosy or white. — G. H. 



Chalcidoid Genus Perilampus and its Relations to the Problem 

 of Parasitic Introduction, The. By Harry S. Smith (U.S. A. Dep. 

 Agr., Bur. Entom., Tech. Ser. No. 19, pt. iv. ; April 1912 ; 8 hgs.j. — 

 Practical utilization of parasites in the control of noxious insects 

 is becoming a more and more important means of warfare in eco- 

 nomic entomology. This paper deals principally with the biology of 

 Perilampus hyalinus. — V. G. J. 



Cheiranthus x Mutallio. By D. Bois and G. T. Grignan (Rev. 

 Hort. p. 318, July 16,1913). — Report on results of crossing Erysimum 

 Allioni with Cheiranthus mutabilis by Messrs. Cayeux and Le Clerc, 

 the second generation producing plants of different habit, and larger 

 flowers than E. Allioni, with a large proportion showing the red colour 

 derived from C. mutabilis* — C. T. D. 



Chestnut (Castanea) Bark Disease (U.S.A. Dep. Agr. Year 

 Book, 1912, pp. 363-372 ; 1 col. plate and many figs.). — A detailed 

 discussion of the damage caused by Endothia parasitica (Murr.), and its 

 cure and prevention. The ascospores are wind and animal carried, and 

 enter through a wound, and possibly even when the bark is uninjured. 

 American chestnuts and cultivated varieties of the European are 

 susceptible; Asiatic species resist to some extent. — E. A. Bd. 



Cider Sickness. By B. T. P. Barker and V. F. Hillier (Jour. 

 Agr. Sci. v. pp. 67-85; Oct. 1912). — The authors discuss the wide- 

 spread trouble in cider-making called "cider sickness." This they 



