Entomology. 45 



1. FEDERAL EXPERIMENT STATION WORK. 



The study of the grape-berry moth was completed, and resulted in 

 much new information regarding its habits, life-history and remedial 

 suggestions. I was able to demonstrate that this pest is an American 

 insect and not a European species, as we have always supposed. It 

 was also found that other similar insects, which had been classified 

 with this grape-berry moth, but which fed on different food plants, 

 were distinct species. One of these allied forms, and also the most 

 common parasitic enemy of the grape-berry moth, were described 

 by experts as new species, and both were named "Slingerlandana." 

 This important work on one of the serious pests of the grape was 

 published as Bulletin No. 223, The Grape-berry Moth. 



Work on the life-histories of two comparatively new shade-tree 

 pests was completed and a practicable and effective method of com- 

 bating them was foimd and tested. Both these insects are sawfly 

 leaf-miners, one working on the European elms, and the other on 

 European alder. They have been quite destructive to the shade- 

 trees on the university campus and in various parts of the state. In 

 connection with these shade-tree pests, I have also studied the bronze 

 birch borer. This insect has wrought great destruction in the parks 

 and on private grounds in several of our large cities, and it is fast 

 killing the white birches on the university campus and in Ithaca. 

 These investigations will be brought together in a bulletin to be issued 

 during the coming j^ear. 



2. p:xtension work. 



The extension of the entomological division under the state appro- 

 priation has been rather miscellaneous and of a more popular charac- 

 ter. 



Teaching. — During the winter I gave a course of lectures on injuri- 

 ous insects, one lecture each week, to 40 students in the winter-course. 



Experimental work. — There was issued from this division Bulletin 

 No. 224, Two Grape Pests: 



I. Effective Spraying for the Grape Root-worm. 



II. A New Grape Enemy: The Grape Blossom-bud Gnat. 



The jvmior author of this bulletin, Mr. Fred Johnson, rendered 

 very valuable services in the w^ork on grape pests duringthe season. 



Although my experiments during the preceding two years indicated 

 that the arsenate of lead spray was effective against the grape root- 

 worm, it was decided to continue the experiment another season to 

 more fully corroborate our work, and demonstrate the value of this 

 method of fighting such a serious pest. The same nine-acre vineyard 



