1916 



ENTOMOLOGICAL SOCIETY. 



85 



The orchard in which the observations were made had almost no crop, .-u no 

 proper estimate of the damage done by these inserts was possible. One tree, how- 

 ever, which had quite a few apples, had about 40 per cent, attacked, but only about 

 10 per cent, rendered culls, the rest being quite saleable as second-class fruit. 



About July 19th a few of the Spys were attacked by the adults, but the feed- 

 ing was very sliglit and of no importance. At the same time a very severe attack 

 indeed was made upon three trees of an unknown large, yellow, seedling variety. 

 The attacked fruit soon rotted and fell, due possibly to inoculations of Twig 

 Blight (Bacillus ai)i!jlovorus) with which the trees were badly attacked, and to 

 which they seemed particularly .susceptible. It is probable that this Capsid was 

 the chief factor in carrying this disease from limb to limb and from fruit to fruit. 



Leavks and T\vi(!s. \o injury of any (K'scription was observed on the loaves 



Injury due to the feeding of nymphs upon the apples when very small, about 



six weeks after the attack. Note the corky scars and pimples. 



(Natural size.) 



themselves, but the, tender luids in axils of the leaves of the young growth were 

 punctured by both nymi)hs and adults, many of them being killed. The young 

 twig itself was also punctured and. when badly attacked, the puncturing was followed 

 bv a small, very convex gall, which later in many cases split and became corky 

 upon the top (see fig.). Both of these kinds of injury were confined largely to 

 the suckers which became bnshy and stunted with the tips of the twigs frequently 

 dving. The new^ growth on the trees tlu'insclves was very seldom more than 

 slightly injured. 



SlMMAlJY or CoNTltOl, K\ rHlJI MEXTS. 



In our control experiments kerosene emulsion and carbolic enuilsion were both 

 found, to he almost useless for, even when applied with great thoroughness they 

 failed to kill more than a small percentage of the nymphs. 



