Education Department Bulletin 



Published fortnightly by the University of the State of New York 



Entered as second-class matter June 24, iqo8, at the Post Office at Albany, N. Y., under the 



act of July 16, 1894 



No. 475 ALBANY, N. Y. July 15, 1910 



New York State Museum 



John M. Clarke, Director 

 Ephraim Porter Felt, State Entomologist 



Museum Bulletin 141 

 25th REPORT OF THE STATE ENTOMOLOGIST 1909 



To John M. Clarke, Director of Science Division 



I have the honor of presenting herewith my report on the in- 

 jurious and other insects of the State of New York for the year 

 ending October 15, 1909. 



The horticuhural world was startled early the present year by 

 the discovery of thousands of young brown tail moth caterpillars- 

 in their winter nests on many shipments of nursery stock imported 

 from France. Drastic recommendations were made and promptly 

 adopted by the Commissioner of Agriculture with the result that, 

 so far as known, none of the pests succeeded in establishing them- 

 selves. The middle of June was noteworthy on account of the find- 

 ing of a small colony of nearly full grown caterpillars of this species 

 at Port Chester, N. Y. The thoroughgoing measures adopted in 

 this instance appear to have resulted in extermination. 



Fruit tree pests. The most conspicuous injury to fruit the 

 past season was undoubtedly caused by the hordes of plant lice 

 which not only abounded upon apple but were exceedingly numer- 

 ous on cherry and more or less destructive to plum. The attack 

 on the apple was followed by the trees producing large numbers 

 of small, gnarly fruit, the latter forming 35 to 45 per cent of the 

 total' number of fruit in some orchards. The exact records of the 

 injury in the two experimental orchards will be found on a subse- 

 quent page. One apple grower estimated the loss at 50 per cent. 

 This phenomenal outbreak coincided with unusually cool weather 

 and was undoubtedly greatly favored by climatic conditions. The 

 cigar case bearer was somewhat abundant in orchards in the west- 



