-^ O^^^ticQ i)pa(jo<^p. ^ 



The Grape Vine Flea Beetle. 



Sa^, Sir, — I have been much troubled with the enclosed beetle on my grape vine. 

 Would spraying destroy them ? Picking them off is a difficult task. 



H. Brantford, Hamilton 



Reply by Prof, Fletcher, Ottawa. 



The beetles sent by Mr. H. Blandford, 

 of Hamilton, which were attacking his 

 grape vines, are the Grape Vine Flea 

 Beetle, Graptodera Chalybea. The best 

 remedy is clean culture in the autumn 

 and the removal of all dead leaves and 

 rubbish, among which the mature beetles 

 pass the winter. For spring treatment 

 when the beetles attack the buds, dust 

 them with Paris green and lime (or any 

 other powder), i lb. Paris green to 25 of 

 the dilutent. 



Fig. 676. — Grape Vine Flea Beetle. 



The Apple-root Plant Louse. 



654. Sir, — We set two hundred apple trees this spring, and some of them had 

 knots on the roots. Can you give cause, and remedy ? 



T. E. Orser, Chisholm, Out 



The knots are excrescences caus- 

 ed by the Apple-root Plant Louse, 

 Schizoneura Lanigera. This insect 

 appears on the roots as a very 

 minute pale-yellow louse, where it 

 sucks the juices with its long pro- 

 boscis. Sometimes the maturer lice 

 climb up the trees, when they may 

 be easily recognized by the bluish- 

 white cottony matter which cover 



Fig. 677. 



them, giving rise to the name Wpoly Aphis, by which they are sometimes known. 

 The effect upon the trees will in time become serious if they are not destroyed. 

 Prof. Saunders in his work on' "Insects Injurious to Fruits " advises baring the 

 roots as far as convenient, and dashing very hot water upon them. Trees being 

 transplanted may be dipped in water not exceeding 15° Fahr. 



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