University of the State of New York 



New York State Museum 



Frederick J. H. Merrill Director 

 Ephraim Porter Felt State Entomologist 



Bulletin 59 



ENTOMOLOGY 16 



GRAPEVINE ROOT WORM 



PREFACE 



The grapevine root worm has proved itself such a destructive 

 eneni}- of vineyards in the Chautauqua grape belt and so little 

 has been done to control it, that it was deemed advisable last 

 spring to undertake an investigation of this insect, particularly 

 as the entomologist's aid had been solicited on several occasions. 

 This bulletin is issued at the present time not that the investi- 

 gations are complete, but because the subject is of such vitai 

 importance that our growers should have all available informa- 

 tion at their disposal. Some valuable facts have been ascer- 

 tained during the past season and it is hoped that future investi- 

 gations may result in demonstrating some satisfactory method 

 of controlling this very serious enemy of the vineyardist. 



Through the courtesy of the Hon. C. A. Wieting, commissioner 

 of agriculture, the entomologist has been able to avail himself 

 of the services of Mr J. Jay Barden, a San Jos^ scale inspector 

 in the western section of the State. Mr Barden has cooperated 

 wdth the writer very efficiently and most of the field investiga- 

 tions were carried on with the assistance of this gentleman. 

 The breeding cage and other office experiments have been con- 

 ducted under the writer's direction by his first assistant Mr 

 0. M. Walker aided by the second assistant ^Mr D, B. Young. 

 The author is also under obligations to Prof. Percy J. Parrott, 

 entomologist of the Ohio Agricultural Experiment Station, and 



