144 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Cockroaches, A Trap for. By F. L. Washburn [Jour. Econ. 

 Entom.Vi. p. 327 ; June 1913 ; one fig.). — ^The trap consists of a conical 

 glass flask having a paper cone with the small end innermost, held in 

 its mouth by means of vaseline. A smaller cone is glued inside this. 

 The trap is baited with banana peel, and is said to be very effective. 



F- /. C. 



Codling Moth, A Brood Study of. By T. J. Headlee (Jour. 

 Econ. Erdom. vi. p. 389 ; Oct. 1913). — The author shows there are three 

 broods of this moth in New Jersey each year, the third late one being 

 a small one. — F. J. C. 



Cotton, Egyptian, as Affected by Soil Variations. By T. H= 

 Kearney (U.S.A. Dep. Agr., Bur. PI. Ind., Circ. 112; Feb. 1913 ; 

 pp. 17-24). — ^This plant is decidedly sensitive to variations in its 

 physical environment. Differences in the texture, and consequently 

 in the moisture-holding capacity of the soil, are easily detected by 

 the differences in the size, appearance, and fruitfulness of the plants, 

 in the size of the bolls, and in the quality of the fibre, the uniformity 

 of the fibre in staple, strength, and other qualities, being of the 

 utmost importance. The soil must have a sufficient water-holding 

 capacity to prevent the plants suffering as a result of drought between 

 irrigations, for where this happens the bolls are few and small and the 

 fibre inferior. The presence of alkali salts in the soil also induces 

 marked differences in the growth and behaviour of the plants, though 

 Egyptian cotton is considered superior to many other plants in 

 its ability to endure an excess of salts in the soil, fair yields of fibre 

 of good commercial quality being obtained where nearly one-half 

 of one per cent, of the total dry weight of the soil consists of readily 

 soluble alkali salts, provided that carbonates black alkali ") are 

 absent or nearly so. New land as a rule should be avoided, owing to 

 its probable variation in moisture capacity. — A . P. 



Cotton Seedlings, Leaf-cut, or Tomosis, a Disorder of. By 0. F. 



Cook (U.S.A. Dep. Agr., Bur. PI. Ind., Circ. 120; April 1913 ; 

 pp. 29-34). — This is characterized by mutilation of the leaves and 

 abortion of the terminal buds, and is readily distinguishable from the 

 distortion caused by plant lice. It is in the nature of an environmental 

 injury, not due to parasitic organisms or constitutional weakness, but 

 apparently connected with exposure to heat and dryness, all varieties 

 of cotton being susceptible in the early stages of growth. Damage 

 can be avoided or reduced by improved cultural methods as detailed 

 in previous publications. — A. P. 



Cucumber Rot. By O. F. Burger (U.S.A. Agr. Exp. Sin., Florida, 

 Bull. 121, Febr. 1914, pp. 96-109 ; 6 figs.). — A bacterial disease 

 of cucumbers which attacks both fruit and leaves. In the fruit white 

 spots, turning into watery vesicles, are formed. These spots grow 

 inwards, not laterally, and ultimately convert the fruit into a soft 



