236 FBUIT INSECTS 



Putnam's scale : apple, p. 179. 



Greedy scale : apple, p. 180. 



Round-headed apple-tree borer : apple, p. 185. 



Flat-headed apple-tree borer : apple, p. 194. 



Twig-pruner : apple, p. 200. 



TwiG-GiRDLER : apple, p. 202. 



Flea-beetles : apple, p. 203. 



Clover mite : apple, p. 206. 



Eye-spotted apple-twig borer : apple, p. 209. 



New York weevil : apple, p. 210. 



Plum curculio : plum, p. 243. 



American plum borer : plum, p. 253. 



European fruit-tree scale : plum, p. 260. 



European fruit lecanium : plum, p. 261. 



Cherry scale : cherry, p. 312. 



Walnut scale : currant, p. 360. 



Rose chafer : grape, p. 297. 



Grape-cane borer : grape, p. 423. 



Cottony maple scale : grape, p. 427. 



Imbricated snout-beetle : strawberry, p. 371. 



Tarnished plant-bug : strawberry, p. 375. 



QUINCE INSECTS 



Nearly all the insects attacking the quince have been dis- 

 cussed under the apple. One of these, the round-headed apple- 

 tree borer, is even more destructive to the quince than to the 

 apple. The only insect which is distinctly a quince pest is the 

 quince curculio treated below. 



The Quince Curculio 

 Conotrachelus cratoegi Walsh 



This is by all odds the most destructive insect with which the 

 quince grower has to contend. In unprotected orchards of 

 western New York often over 90 per cent of the crop is either 

 infested by the grubs or rendered gnarled and knotty by the 

 punctures of the beetles (Fig. 218). 



