﻿Bui. 
  1 
  16, 
  Part 
  I, 
  Bureau 
  of 
  Entomology, 
  U. 
  S. 
  Dept. 
  of 
  Agriculture 
  

  

  Plate 
  

  

  Fig. 
  1.— 
  Rod 
  and 
  Single 
  Cyclone 
  Nozzle 
  Used 
  to 
  Apply 
  Spray 
  to 
  Underside 
  of 
  

   Grape 
  Foliage. 
  Power 
  Supplied 
  by 
  Tractor 
  Sprayer. 
  Vineyard 
  of 
  Mr. 
  H. 
  H. 
  

   Harper, 
  North 
  East, 
  Pa. 
  (Original.) 
  

  

  ^ 
  

  

  ;£&# 
  .-■--" 
  x 
  - 
  

  

  <■■ 
  v 
  u 
  fft 
  I 
  

  

  ML 
  ^ 
  tu 
  ' 
  "*r 
  -*> 
  

  

  Fig. 
  2.— 
  Rod 
  Carrying 
  Two 
  Cyclone 
  Nozzles 
  Used 
  to 
  Apply 
  Spray 
  to 
  Underside 
  

   of 
  Grape 
  Foliage. 
  Power 
  Supplied 
  by 
  Compressed 
  Air. 
  Vineyard 
  of 
  Mr. 
  

   A. 
  I. 
  Loop, 
  North 
  East, 
  Pa. 
  (Original.) 
  

  

  SPRAYING 
  AGAINST 
  THE 
  GRAPE 
  LEAFHOPPER. 
  

  

  