70 ^ 



Gibson (A.). A new species of Tortrix of Economic Importance^ 

 from Newfoundland (Lepidoptera : ToTtncida.e).—Canadia7iEnto7no- 

 logist, London, Ont., xlviii, no. 11, November 1916, pp. 373-375, 

 1 plate. 



Tortrix oleraceana, sp. n., the larvae of which were present in 

 destructive numbers on some farms near St. John's, is described. It 

 w^as at first thought that it might be the European species, T. ivahl- 

 bomiana var. vigaureana, Tr., and that it had been imported with spring 

 cabbage j^lants from Ireland. Examples sent to the Imperial Bureau 

 of Entomology w^ere however found not to agree exactly with any of 

 the British forms of this variable species.* 



Cameron (A. E.) & Treherne (R. C). The Pear Thrips in British 

 Columbia and its Control. — Agric. Gaz. Canada, Ottawa, iii, no. 11, 

 November 1916, pp. 946-951, 4 figs. 



The pear thrips, Taeniothrips jtyri, Dan., now shown to be identical 

 with the European species, T. inconsequens, Uzel [see this Revietv, 

 Ser. A, V, p. 68], has been the object of investigations as to its destruc- 

 tiveness and its control under Canadian conditions. The principal 

 damage to deciduous fruit trees is effected by the feeding of the adults- 

 on the buds. Where a number of individuals attack the same bud, 

 it acquires a shrivelled appearance and is then peculiarly liable to 

 attack by blue moulds. The damage throughout a pear orchard is by 

 no means uniform. Apples appear to suffer less from the effects of 

 attack by the adult than pears, though the damage done to Italian, 

 prunes and different varieties of plums is far heavier. Cherries may 

 suffer badly, but efficient spraying will control the insects in. the bud 

 clusters. An extensive campaign of spraying with a mixture of whale- 

 oil soap, 5 lb., and Black Leaf 40 (nicotine sulphate) f pint to 100 gals, 

 of water, was carried out at various points on Vancouver Island with 

 satisfactory results. Three applications were made on apples and 

 pears, just as the buds were bursting, when the blossoms w^ere showing 

 pinlv, and when they were shed. For the last two sprayings, arsenate of 

 lead at the rate of 4 lb. to 100 gals, was added to the mixture to combat 

 leaf-eating caterpillars. Only two applications were made on prunes, 

 plums and cherries, one before blossoming and one after. Another mix- 

 ture consisting of miscible oil, No. 2, 5 gals., and Black Leaf 40, 1 pint to 

 200 gals, of water, was tried, but this caused scorching of the leaves, and 

 the oil persists on the branches and trunks and tends to neutralise the 

 full effects of the autumn application of Bordeaux mixture for com- 

 bating apple and pear scab. A table is given showing the number of 

 thrips larvae on the trees before and after spraying and the percentage 

 of mortality. 



At present T. inconsequens has been taken only on the Saanich penin- 

 sula and at Duncan, but has not been noted on the mainland of the 

 province. 



*Mr. J. H. Dun-ant informs us that some of the varieties figtired in 

 this paper agree well with British examples, and he cannot regard them 

 as being specifically distinct. — Ed. 



