6 NEW YORK STATE MUSEUM 



about three weeks later. The unusual abundance of the codling 

 moth the past season renders the data secured of exceptional value 

 because they show the possibilities under very adverse conditions. 

 Assistant State Entomologist Young aided in the field work and was 

 responsible in large measure for the computation of the tabulated 

 data. These experiments and their application are discussed on 

 subsequent pages. 



The San Jose scale is still very destructive, especially to peach 

 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. There 

 was complaint of injury by the cherry maggot in the Hudson valley 

 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 numerous 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 Rent.) was observed in the 

 Hudson 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 wxll known form which has been 

 exceedingly abundant on Long Island, throughout the Hudson val- 

 ley 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 vicin- 

 ity 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 



