5G7 



against it with carbon bisulphide, hydrocyanic acid and aniUne. The 

 latter has many advantages over carbon bisulphide, as it is neither 

 poisonous nor inflammable, but is much more expensive. 



Baryshevtzev {V.). KeflpoBHMKM-nnOflOBbie caAbl. [Cedar Planta- 

 tions for Seed.] — «JltCHOM >HypHajnj.» [Forestry Journal]. 

 Petrograd, xlvii, no. 1-3, 1917, pp. 35-55, 3 photos. [Received 

 24th October 19] 7.] 



In this paper on Phi.us cembrd (Siberian Cedar), the chief insect 

 pests of this tree are stated to be Hylobius abietis and Monochamu>i 

 {MowjJuonmus) sulor. The latter attacks tree^ already injured b\' 

 H. abietis or other beetles and has been rejwrted as doing serious 

 harm in the government of Tobolsk. 



Trapping of the Cotton Stainer. — Aqric. News, Barbados, xvi, no, 40(>, 

 25th August 1917, p. 267. 



The Agricultural Superintendent, St. Vincent, records the results of 

 experiments recently made to control Dtjsdercus delauneyi, Leth. 

 (cotton-stainer) in the field in St. Vincent. In 191(5 a campaign was 

 instituted against the silk-cotton tree [Eriodendron anfraduosum], an 

 importcint food-plant of this pest, though a small number could not 

 be dealt with owing to their being situated among valuable crops. 

 When they fruited, these isolated trees acted as traps and attracted 

 large nmnbers of cotton-stainers. 



In order to trap and destroy the insects, without permitting them 

 to scatter over the district, heaps of silk-cotton pods were made under 

 the trees and three times daily the insects on them were collected 

 and killed with boiling water. As the pods became exhausted, cotton- 

 seed meal was substituted, but this quickly lost its attractiveness, 

 though cotton seed proved a strili:ing success, especially when the 

 traps were shaded. The fear that boihng water, inefficiently applied 

 by labourers in remote districts, might result in the traps actual!}' 

 becoming breeding places, suggested the substitution of kerosene 

 emulsion, but this acted as a repellent, the traps requiring to be 

 freshly baited after each spraying. 



All tliese difficulties have been overcome by the use of the gasoline 

 torch, which has proved expeditious, efficient and inexpensive. The 

 torch used w^as of American manufacture, costing 15.s-., and held one 

 (juart of gasoline ; this gave a long, clear, blue, c(?ntinuous, horizontal 

 iet of flame that could easily be directed to any required point. Most 

 of the insects Avere killed in a few minutes, while the attractiveness 

 and effectiveness of the bait was not destroyed, and it could be used 

 for several- days in succession if the weather were not very wet, earlv 

 morning proving the best time to visit the traps. 



Ritchie (A. H.). Scale on Yams. — Jl. Jamaica Agric. Soc, Kingston. 

 xxi, no. 9, September 1917, pp. 358-359. 



Targionia Imrtii, Ckll. (yam scale) is found encrusting the tubers 

 of yams in Jamaica and ascends from the tubers to the plants, which 

 are sometimes killed by this scale. As soon as a crop of infested yams 

 has been gathered and the old vines burnt, the plot should be 



