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Lyne (W. H.). The Control of incipient Infestation of Codling-Moth 

 in a new District. — Proc. Entom. Soc, British Columbia, Victoria, 

 no. 7, July 1915, pp. 11-13. [Received 19th November 1915.] 



Two methods of control can be used in dealing with incipient 

 infestations of Cydia potnonella. These are the destruction of all fruit 

 within the infected area during early summer, and systematic spraying 

 with lead arsenate, banding the trees, and a rigid quarantine of all fruit 

 within the infected district. If infestation is not discovered until late 

 in the season, destruction of fruit is useless, owing to the fact that 

 many of the larvae will have left the fruit and entered crevices of 

 the bark to pupate. The second method, if carried out thoroughly 

 by all growers, should stamp out any new infestation in a short 

 time. 



Palmer (L. L.). Sprays of up-to-date Interest. — Proc. Entom. Soc, « 

 British Columbia, Victoria, no. 7, July 1915, pp. 14-16 [Received I 

 19th November 1915.] 



Commercial preparations of oil emulsions contain the following 

 constituents :• — 85 per cent, hydrocarbon oils (paraffin series), 4 per 

 cent, phenols (mostly cresylic acid), and about 11 per cent, inert matter. 

 These emulsions have proved very satisfactory when diluted so that ' 

 16 or 20 gals, make 200 gals, spray, and seem to possess the correct 

 physical characteristics which give proper penetration without injury 

 to trees. Emulsions made from crude oil should only be used as. 

 dormant insecticide sprays. The formula given for the preparation 

 of crude oil emulsion is- — fish-oil or whale-oil soap, 5 lb. ; caustic 

 soda, 1 lb. ; crude oil, 6 gals. ; water, 43 gals. Crude oil frequently 

 contains much foreign matter and should never be used except where 

 it is possible to apply at least 200 lb. pressure. Where a better oil 

 or distillate is obtainable, it should be substituted for the crude oil. 

 If a distillate testing 29° Be. is used, 4 gals, only are necessary in the 

 above formula. 



Treherne (R. C.) The Tarnished Plant-Bug {Lygus jpratensis, Linn.), 

 — Proc. Entom. Soc, British Columbia, Victoria, no. 7, July 1915, 

 pp. 16-18. [Received 19th November 1915.] 



Lygus pratensis, L. (tarnished plant-bug), is prevalent in the Lower 

 Fraser Valley and is a serious pest in greenhouses. It is believed to 

 be the most important agent in transmitting Bacillus amylovorus (fire- 

 blight). The details of oviposition in British Columbia are as yet 

 uncertain. The eggs are probably laid in autumn and spring on weeds, 

 which act as host-plants during these periods. The adults are very 

 active during the day and can only be captured in early morning in 

 spring when they are partially dormant. The chief injury occurs on 

 the terminal shoots of peaches, pears, apples, etc., in nurseries, resulting 

 in temporary or permanent cessation of growth. The destruction of 

 weeds in orchards, trapping by sticky shields, and spraying with dilute 

 kerosene emulsion or nicotine extracts at the time when nymphs are 

 present are recommended. 



