﻿REPORT OF THE DIRECTOR I9IO 37 



trees, though our progressive orchardists have comparatively little 

 difficulty in controlling it. A lime-sulfur wash, particularly that 

 known as the concentrated wash, either homemade or commercial, 

 has proved very satisfactory, as a rule, in checking this pest. In 

 the Hudson valley there was complaint of injury by the cherry 

 maggot and an investigation of the pest and methods of controlling 

 it was inaugurated. The cherry and pear slug was exceptionally 

 abundant in this region and also in the western part of the State. 

 The pear psylla was somewhat abundant in the lower Hudson valley 

 and reports of serious injuries were received from certain sections 

 in the western part of the State. 



The work of a new apple pest which may be known as the lined 

 red bug (Lygidea mend ax Reut.) was observed in the Hud- 

 son valley. This insect occurs in early spring, lives upon the more 

 tender terminal leaves and, under favorable conditions, may inflict 

 considerable injury. 



Shade tree pests. The injurious work of various species has 

 been brought to our notice. The more important of the shade tree 

 pests is the elm leaf beetle, a well-known form which has been 

 exceedingly abundant on Long island, throughout the Hudson 

 valley and in certain cities in the western part of the State. The 

 sugar maple borer has been unusually numerous on the trees of 

 Fulton, Oswego county, destroying or practically ruining a number 

 of magnificent trees. The cottony maple scale has been somewhat 

 abundant in the lower Hudson valley, while the injurious work 

 of the false maple scale was observed in several localities in the 

 vicinity of New York city. 



Forest insects. The snow-white linden moth, a pest which has 

 been very destructive in the Catskills for the past three years, was 

 abundant in limited localities last season and its flight in small 

 numbers was observed in various places. A series of outbreaks 

 by another leaf feeder was reported from several localities. They 

 were due to the operations of a green, white-striped caterpillar 

 (Xylina antennata) frequently designated as the green 

 fruit worm. The destructive work of the hickory bark beetle, noted 

 in a preceding report, has been continued. An unusual outbreak 

 was that of Abbott's sawfly, a false caterpillar which stripped or 

 nearly defoliated many white pines in the foothills of the Adiron- 

 dacks. The spruce gall aphid has continued to be abundant and 

 injurious on Norway spruce, in particular. It is interesting to 

 record the discovery of another species of gall aphid, new to the 



