62 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 6 



The Pear Thrips. At the last meeting of this Association mention 

 was made of the occurrence and the destructive work of Euthrips pyri 

 Daniel in orchards about Germantown. With the cooperation of 

 Messrs. Blanch and Albright of the Division of Nursery Inspection, 

 through the courtesy of Commissioner Calvin J. Huson, we have 

 determined that the thrips ranges over the Hudson River Valley from 

 Monsey near the New Jersey line to Ravena near Albany, While the 

 insect has done quite a little damage in some orchards on the west 

 side of the river, it has been much more destructive in the region on 

 the east side, running from Hudson to Germantown. In western 

 New York the insect has been found on apples and cherries about 

 Geneva and on pears in the fruit belt running from Rochester to the 

 Niagara River. 



While the thrips attacks all of the important tree fruits, it seems to 

 be especially injurious to pears, principally the varieties Kieffer, 

 Seckel and Clapp Favorite. During the spring of 1912 the blighting 

 of blossom clusters in some orchards was very severe and caused a great 

 reduction in fruit yields. Apple trees, while visited by large numbers 

 of the adults, suffered to a much less extent; but dwarfed and curled 

 leaves and occasionally stunted fruits were observed in most orchards. 

 The stems of sweet cherries were especially attractive to the adults 

 for the deposition of the eggs, and they as a rule showed considerable 

 scarification. The effects of this injury upon fruit yields has proven 

 difficult to determine, but our observations this spring led us to be- 

 lieve that the wounding of the stems may cause quite a little loss by 

 the premature dropping of the affected cherries. 



The results from the second year's spraying experiments were very 

 satisfactory, and we shall continue to encourage spraying as the most 

 promising means of affording protection to orchards. 



The Cherry Sawfly Leaf-Miner. This insect has attracted the 

 attention of cherry growers quite recently and its work has been very 

 conspicuous in plantings about Geneva and Germantown. The pest 

 attacks sour cherries, preferring the variety Morello. The injury is 

 caused by the larvae of the sawfly which mine the leaves. The attack 

 commences on the edge of the leaf towards the stem. The young 

 larva works along one side towards the apex of the leaf, the tunnel 

 increasing in size with the progress of the insect. Upon reaching the 

 tip of the leaf the grub reverses its course and works back towards 

 the stem, consuming the remainder of the pulpy tissues between the 

 main rib and the margin of the leaf. As a result the interior of the 

 leaf is eaten, leaving the epidermis which turns brown and forms a 

 large blister. These blisters are very conspicuous in the upper sur- 

 faces of the leaves. Oftentimes the whole leaf is mined, but usually 



