565 



Beeson (C. F. C). The Food-plants of Indian Forest Insects, Part vii. 



— Ind. Forester, Allahabad, xlviii, no. 9, September 1922, 

 pp. 494-500. 



This continuation of lists previously noticed [R.A.E., A, ix, 426, etc.] 

 deals with the Scolytids : Carphoboriis costatiis, Eichh., in Finns 

 excelsa and F. longifolia ; Crypturgiis pttsilliis, Gyll., in Abies webbiana, 

 Cedrus deodara, Finns excelsa and F. longifolia ; Dryocoetes indicus,. 

 Steb., in Abies webbiana, Ficea morinda, Finns excelsa and F. longifolia ; 

 Eccoptopterns sexspinosiis, Mot., in Shorea robusta ; Ips longifolia, 

 Steb., in Abies webbiana, Cedrits deodara, Finns excelsa, F. gerardiana 

 and F. longifolia ; Fityogenes scitns, Bldfd., in Cedrns deodara, Ficea 

 morinda, Finns excelsa and F. gerardiana ; Folygraphns longifolia, 

 Steb., in Finns longifolia ; F. pini, Steb., in Abies webbiana, Cedrus 

 deodara, Ficea morinda and Picea excelsa ; Sphaerotrypes globulus,. 

 Bldfd., in Anogeissns latifolia, Lagerstroemia parviflora, Shorea robusta 

 and Terminalia tomentosa ; S. siwalikensis, Steb., in Shorea robusta and 

 S. assamica ; and Strophinocerus minimus, Hagd., in Frumis armeniaca 

 (apricot). 



Bremer (M). Importaneia de los Pies inatacables por el Pulgon 

 lanudo en las Plantaciones de Manzanos en la Argentina. [The 

 Importance of Stocks resistant to the Woolly Aphis in the 

 Apple Orchards of Argentina.] — Anales Soc. Rur. Argentina, 

 Buenos Aires, Ivi, no. 15, 1st August 1922, pp. 398-400. 



Many Argentine fruit-growers are deterred from undertaking apple 

 cultivation, in spite of its many economic advantages, owing to the 

 losses caused by the woolly aphis [Eriosoma lanigernm]. The use of 

 stocks resistant to this pest is advocated as a solution of this problem. 



Vayssiere (P.). Proprietes insecticides de la Chloropicrine : leur 

 Utilisation dans la Desinfection des Semences de Coton. — Agron. 



Colon., Faris, no. 56, August 1922, pp. 249-253. 



Disinfection of cotton seed attacked by Flatyedra {Fectinophora) 

 gossypiella has generally been effected by the heat method as adopted in 

 Egypt. As, however, the growers in French West Africa are desirous 

 of importing certain foreign varieties of cotton, the Institut d'Agronomie 

 Coloniale and the Entomological Station of Paris have been pursuing 

 researches with a view to finding some reliable method of disinfestation 

 that will entail the minimum of expense. In this respect chloropicrin 

 has been found the most useful insecticide. The present stocks, 

 obtained by the Government for war purposes, are available at a 

 very low figure, and the commercial price never exceeds 15 fr. per kilo 

 (about 5s. 'Sd. per lb.). This fumigant is used at ordinary temperatures 

 and presents no difficulties of transport or manipulation. Moreover, 

 the loss in germination of treated seed (about 3 per cent.) is negligible. 

 A dose of 30 grammes per cu. metre (about 1 oz. per 35 cu. ft.), acting 

 for 24 hours in a closed receptacle or room, is sufficient for complete 

 disinfestation. Investigations are in progress to determine the 

 further possibilities of this gas as an insecticide. In manipulating 

 large quantities of the gas, the use of a gas mask is advised. 



