﻿U. 
  S. 
  DEPARTMENT 
  OF 
  AGRICULTURE, 
  

  

  BUREAU 
  OF 
  ENTOMOLOGY— 
  BULLETIN 
  No. 
  116, 
  Part 
  I. 
  

  

  L. 
  O. 
  HOWARD, 
  Entomologist 
  and 
  Gnef 
  of 
  Bureau. 
  

  

  PAPERS 
  ON 
  DECIDUOUS 
  FRUIT 
  INSECTS 
  

   AND 
  INSECTICIDES. 
  

  

  SPRAYING 
  EXPERIMENTS 
  AGAINST 
  

  

  THE 
  GRAPE 
  LEAFHOPPER 
  IN 
  THE 
  

  

  LAKE 
  ERIE 
  VALLEY 
  IN 
  1911. 
  

  

  BY 
  

  

  FRED 
  JOHNSON, 
  

  

  Agent 
  and 
  Expert. 
  

  

  Issued 
  July 
  15, 
  1912. 
  

  

  WASHINGTON: 
  

  

  GOVJ 
  BNMBNT 
  immvi 
  [NG 
  OFFICE. 
  

  

  1912. 
  

  

  