586 



Ballou (H. a.). Cotton Pests and the Cotton Market.— ^^nc. News, 

 Barbados, xx, no. 505, 3rd September 1921, p. 282. 



The general situation in regard to pests of cotton in the West Indies 

 is reviewed. Tlie record? of appearance of the pink bolhvorm [Platyedra 

 gossypieUa] in the islands and the necessary remedial measures are 

 enumerated. If cotton should cease to be grown for a season, a sharp 

 watch should be kept for the appearance of the pest on its wild food- 

 plants, okra, hollyhock, or wild cotton. Cotton stainers [Dysdercus 

 spp.] also depend on wild cotton and certain small Malvaceous plants 

 during the close season, and these should be eliminated, or cut back 

 so that they do not bear fruit. The blister mite [Eriophycs gossypii] 

 is also held in check by these remedies. The cotton wonn [Alabama 

 aygillacea] is sometimes a serious pest, and cannot be controlled by 

 the same methods ; it is thought that the invasions are renewed 

 every j^ear, probably from South America. 



WTien the demand for Sea Island cotton is renewed, the West Indies 

 should be in a good position with regard to the industry, and it is 

 important that legislation should be enforced, and careful inspection 

 maintained, in order to safeguard the cultivation of cotton and ensure 

 as far as possible its freedom from insect pests. 



DE JoAN'Nis (J.). Les LiihocoUetis des Erables. [The Lithocolletis of 

 Maples.] — Ann. Soc. Ent. France, Paris, Ixxxix, no. 3-4, 1920, 

 pp. 405-416, 9 figs. 



Phyllorycter [Lithucolletis) plaianoideUa, sp. n., is described as 

 mining the leaves of A cer platanoides at Boulogne. The nomenclature 

 of the moths of this genus mining in various species of Acer is reviewed. 



ScELsi (S.). Contro la Mosca olearia. [Against the Olive Fly.] — Riv. 

 Agric, Parma, xxvi, nos. 36 & 38, 9th & 23rd September 1921, 

 pp. 516-517 & 541-542. 



Of the various methods tried against the olive fly [Dacus oleae] 

 the poison sprays containing molasses and potassium arsenate (Berlese 

 formula) and molasses and sodium arsenate (De Cillis formula) gave 

 positive results if apphed by a sufficient number of olive growers in 

 co-operation [R.A.E., A, i, 271]. Subsequently Lotrionte found 

 that solutions of glucose are more attractive than molasses, and that 

 copper sulphate is more effective than sodium and potassium arsenates. 

 He ultimatelv developed his system of poison-traps with sodium 

 arsenite as the poison [R.A.E., A, ii, 289, 452, 479, 577]. Olive 

 growers are strongly urged to employ this method as the best available. 



CiMATTi (V.). Preparazione degli Insetticidi. [The Preparation of 

 Insecticides.] — Riv. Agric, Parma, xxvi, no. 40, 7th October 

 192J, pp. 572-574. 



This popular article gives a number of formulae for the liquid 

 insecticides in common use, together with brief notes on their 

 preparation. 



