LEHER OF TRANSMITTAL 



U. S. Department of Agriculture, 



Bureau of Entomology, 



Washington, D. C, June 8, 1910. 

 Sir : I have the honor to transmit herewith for pubHcation a manu- 

 script entitled ''The Grape Root- Worm, with Especial Reference to 

 Investigations in the Erie Grape Belt from 1907 to 1909," by Fred 

 Johnson and A. G. Hammar, agents and experts, of this Bureau. 



The grape root- worm is by far the most serious pest of American 

 varieties of grape at the present time and its ravages have caused a 

 great depreciation in the value of vineyard properties as weU as a 

 marked reduction in the yield of fruit. The present report furnishes 

 a careful account of the life history and habits of the pest, embodies 

 a report on the work undertaken by the Bureau of Entomology in 

 the spring of 1907 in the Erie Grape Belt, at the instance of vine- 

 yardists, and provided for by Congress, and points out practical 

 remedial measures whereby the vineyardists will be able largely to 

 avoid future losses. 



During the years 1908 and 1909 the work has been in cooperation 

 with the office of the zoologist of the Pennsylvania state department of 

 agriculture, as further detailed in the preface. 



I recommend the publication of the accompanying manuscript as 

 Bulletin No. 89 of this Bureau. 



Respectfully, R. S. Clifton, 



Acting Chief of Bureau. 



Hon. James Wilson, 



Secretary of Agriculture. 



