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ENTOMOLOGICAL SOCILTV 



97 



these scales in check. Tlieir presence should be looked for on Hawthorns, 

 Mountain-ash and other trees as well as those grown in the orchard or 

 garden. 



Among other insects affecting fruit-trees that were noticeable during the 

 past season may be mentioned the Shot-hole borer or Fruit-tree Bark-beetle 

 (Scolytus riiguJosits), which was somewhat abundant in the Niagara district. 

 It especially attacked cherry-trees, on which its presence was make known 

 by exudations of gum. This small beetle does not as a rule aft'ect healthy 

 trees but only those that are sickly and dying, and is often found on limbs 

 whose vitality has been weakened by scale insects. The only available 

 remedy is to cut off and burn all limbs that have been attacked; dying trees 

 should be removed and all brushwood from prunings burnt. 



The usual perennial insects, that are more or less abundant every year, 

 made their presence felt this year also, such as the plum curculio, the eye- 

 spotted bud-moth, pear-tree slug, tree cricket, rose chafer and the grape- 

 vine flea-beetle. Fuller information regarding these insects and how to deal 

 with them niav be found in a recent bulletin by the writer on "Insects af- 

 fecting Fruit-trees" issued by the Ontario Department of Agriculture. 



\'\^. ?>0. Red-necked Agrillus ; a anal processes ; h larva ; c beetle — much enlarged. 



Fig. 3L Easpberrv Gouty-gall caused by tlie Red-necked Agrilus. 



Market gardeners in the neighborhood of London complained very much 

 of an attack upon their raspberry bushes, which proved to have been made 

 by a small beetle, the Eed-necked Agrilus (A ruficolUs). Fig. 30c. Por- 

 tions of the canes were found to be much swollen in the form of a roughened 

 pithy gall which rendered them liable to break off, or to dry up and die. 

 Fig. 31. The beetle, which is about two-fifths of an inch in length, is slen- 

 der in shape with a dark bronzy head, a bright coppery thorax and dark 

 brownish wing covers. It lays its eggs on the canes in July and the grubs, 

 which soon hatch out, burrow into the wood and by the irritation they pro- 

 duce in the plant-tissue cause the enlargement referred to, which is called 

 the Raspberry Gouty-gall. The grubs are slender and thread-like, with a 

 flat head, Fig. 306, and live in the canes till the following spring, when 

 they change to the chrysalis stage and later on appear as beetles. Cutting 

 out and burning all affected canes is the only available remedy. 



7 KN. 



