•203 



Miscible oil No. 2 was also tested. The oil appeared to be more 

 effective in penetrating the opening buds early in the spring and 

 reaching the thrips feeding in them. The results of spraying showed 

 that fully 50% of the adults were killed after each spraying either 

 with soap or oil mixtures, whilst the larval mortality in some cases 

 reached as high as 77%. Arsenate of lead in the proportion of 2 lb. to 

 40 gals, of mixture was added to the second and third applications. 

 The cost per tree varied from Id. to Is. 5d. for three applications. 

 The amount of mixture applied per tree varied from 1| to 5 gallons 

 according to the size and age of the tree. Owing to the prevalence 

 of apple-scab, it is advised that this year a combination spray of sum- 

 mer-strength lime-sulphur and Black Leaf 40 in the proportion of 1 

 to 900 will be most efficacious for the second and third applications 

 for apples and pears. As a first application for apples, pears and 

 cherries the whale-oil soap and Black Leaf 40 combination spray is 

 advised. The first application should be made when the thrips make 

 their appearance, the second as the blossoms are showing colour, 

 and the third just after they are shed. 



Rhumann (M. H.). The Woolly Aphis of the Apple is becoming a 

 serious Pest. — Agric. Jl., Victoria, B.C., i, no. 12, February 1917, 

 p. 209, 1 fig. 



The woolly aphis {Eriosoma lanigerum) has become a common and 

 serious pest in British Columbia during the last six years. Sprays 

 should be applied directly the insects appear, sufficient force being 

 used to remove their loose waxy coverings and expose the surface 

 of their bodies to the spray liquid. When root- infestation is present, 

 the main roots within a radius of two feet of the trunk should be 

 exposed and drenched with the spray, as also should the soil before 

 it is replaced. To prevent the migration of this Aphid to the roots, 

 a small quantity of the surface soil near the base of the trees may 

 be removed and replaced with fine sand. 



The following formulae are given for control mixtures : — As a contact 

 spray, nicotine sulphate 40%, 1| pints; cresol soap, 1 gal., or whale- 

 oil soap 12 lb. ; water, 200 gals. For dipping infested nursery stock 

 before replanting, nicotine sulphate 40%, H fluid ounces ; cresol 

 soap, .5 fluid ounces, or whale-oil soap, 6 ounces ; water, 5 gals. 



WiNSLOw (R. M.). Fruit-growers realise that increased Spraying is 

 necessary. — Agric. Jl., Victoria, B.C., i, no. 12, February 1917, 

 p. 218. 



An increase has occurred in the number of power sprayers in use in 

 various districts of the Province. The result of experimental work 

 shows that nicotine sulphate and a whale-oil soap spray \vill control 

 pear thrips [TaeniotJirips inconsequens]. Against Aphids a mixture 

 of Black Leaf 40, 6 oz., hme 2 lb., and 100 gals, of water destroys 

 practically all the insects. 



Shinji (G. 0.). The Californian Species of Myzus, with the Descrip- 

 tion of a New Species. — Canadian Entomologist, London, Ont., xlix, 

 no. 2. February 1917, pp. 49-51, 1 fig. 



The following species were collected in Berkeley, Cahfornia, during 

 1915 : — Myzus cerasi, F., from cultivated cherry (Prunus cerasus) ; 

 (C363) b2 



