276 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Codling Moth, Recent Experiments with. By E. P. Felt 



(Jour.Econ.Entom., 5, 153-169 ; April 1912). — Accounts of experiments 

 and a long discussion on the relative advantage of a single early spray- 

 ing and frequent spraying against codling moth. It appears that the 

 different atmospheric conditions obtaining in the eastern and western 

 States call for different methods of spraying. This being so, no finality 

 was reached in the discussion which took place at the annual meeting 

 of State entomologists. In the eastern States one spraying with an 

 arsenical spray within ten days of the fall of the petals was found to 

 give the best results. — F. J. C. 



Conifers in the Lower Congo. By R. Kinds {Rev. Hort. Beige, 

 No. 21, p. 336, Nov. 1, 1912 ; plates). — A descriptive and illustrated 

 list of the conifers at present growing in the grounds of the Jesuit 

 Mission at Kisantu, on the Congo. These include Araucaria Bidwilli, 

 A. excelsa, Biota, Juniperus bermudiana, and others. The con- 

 ditions at the Mission are not by any means favourable, so it is 

 much to the credit of Brother Gillet, who superintends the plantations, 

 that these are able to contribute largely to the support of the mission- 

 aries and their pupils. From the point of view of the ordinary colonist 

 it would lessen the importance of these favourable results if the trees 

 were kept alive only through the constant care of Brother Gillet and his 

 assistants. This, however, appears not to be so. Grown from seed in 

 the colony and nursed through one dry season, the trees may safely 

 be left afterwards to take care of themselves. — M. L. H. 



Cotton, a Method of Inbreeding. By W. W. Gilbert (Proc. 

 Amer. Breeders' Assn., vol. 8, pp. 405-409; 1912 ; 2 figs.;. — A less 

 tedious method of protecting cotton flowers from foreign pollen than 

 the old bag method was found in loosely winding No. 26 soft copper 

 wire round the bud just before it begins to open at the tip. The 

 flowers are self-fertile, and the loose coiling of the wire prevents the 

 opening of the corolla to admit insects, but does not interfere with the 

 development of the floral parts. — F. J. C. 



Cotton-wilt and Root-knot, the Control of. By W. A. Orton and 



W. W. Gilbert (U.S.A. Dep. Agr., Bur. PI. hid., Circ. 92; March 

 1912 ; figs.) — Root-knot due to the eelworm Heterodera radicicola 

 is very common in this country on a variety of plants, and Cotton-wilt 

 due to a Fusarium is one of the main troubles in the cotton-growing 

 States of America. The cotton-wilt fungus is confined to the cotton 

 and okra and is usually found associated with root-knot. Varieties 

 of cotton have been secured resistant to wilt, but resistance to root- 

 knot has not yet been obtained. Rotation of crops is the main thing 

 to use to gain ascendancy over the latter pest. Lists of immune 

 plants and of those commonly attacked are given, together with an 

 account of experiments towards securing wilt-resisting cotton plants. 

 — F. J.C. 



