﻿THE 
  GRAPE-BERRY 
  MOTH. 
  

  

  53 
  

  

  The 
  sections 
  were 
  laid 
  off 
  in 
  seven 
  plats 
  of 
  approximately 
  1 
  acre 
  

   each. 
  There 
  were 
  five 
  rows 
  of 
  vines 
  in 
  each 
  plat. 
  (See 
  plan 
  of 
  plat 
  

   arrangement, 
  fig. 
  18; 
  dotted 
  lines 
  in 
  figure 
  indicate 
  divisions 
  of 
  plats.) 
  

  

  The 
  insecticides 
  in 
  all 
  cases 
  were 
  applied 
  with 
  Bordeaux 
  mixture 
  

   since 
  it 
  is 
  desirable 
  to 
  use 
  this 
  fungicide 
  at 
  the 
  time 
  the 
  applications 
  

  

  

  4m 
  

  

  PPP^ 
  v> 
  *j| 
  

  

  

  

  Fig. 
  17.— 
  Vineyard 
  in 
  which 
  poison-spray 
  experiments 
  were 
  conducted 
  against 
  larvae 
  of 
  the 
  grape-berry 
  

   moth 
  during 
  the 
  seasons 
  of 
  1907, 
  1908, 
  and 
  1909; 
  vineyard 
  of 
  Mr. 
  W. 
  S. 
  Wheeler, 
  North 
  East, 
  Pa. 
  (Original.) 
  

  

  are 
  made 
  against 
  the 
  larvae 
  of 
  the 
  grape-berry 
  moth, 
  to 
  control 
  

   fungous 
  diseases, 
  such 
  as 
  black 
  rot 
  and 
  mildew. 
  In 
  all 
  cases 
  where 
  

   arsenate 
  of 
  lead 
  was 
  used 
  the 
  Bordeaux 
  formula 
  was 
  5 
  pounds 
  of 
  lime 
  

   and 
  5 
  pounds 
  of 
  copper 
  sulphate 
  to 
  50 
  gallons 
  of 
  water. 
  Where 
  

   arsenite 
  of 
  lime 
  was 
  used 
  with 
  the 
  Bordeaux 
  an 
  additional 
  pound 
  of 
  

   lime 
  was 
  used 
  to 
  counteract 
  any 
  free 
  arsenic 
  which 
  might 
  be 
  present. 
  

  

  p 
  I(; 
  . 
  is.— 
  Plat 
  arrangement 
  of 
  poison-spraying 
  experiments 
  against 
  the 
  larva* 
  of 
  the 
  grape-berry 
  moth 
  in 
  

   the 
  vineyard 
  of 
  Mr. 
  W. 
  S. 
  Wheeler, 
  North 
  East, 
  Pa., 
  1907. 
  (Original.) 
  

  

  A 
  gasoline-engine 
  vineyard 
  sprayer 
  outfit 
  (fig. 
  19) 
  was 
  used 
  for 
  

   making 
  the 
  application. 
  

  

  The 
  spray 
  was 
  applied 
  to 
  the 
  vines 
  from 
  (he 
  machine 
  by 
  means 
  of 
  

   a 
  fixed-nozzle 
  arrangement 
  (see 
  fig. 
  19). 
  To 
  a 
  vertical 
  rod 
  on 
  both 
  

   sides 
  of 
  the 
  hack 
  end 
  of 
  the 
  machine 
  two 
  short 
  spins 
  of 
  ]-inch 
  pipe 
  arc 
  

   attached. 
  Each 
  spin- 
  carries 
  a 
  large 
  nozzle 
  of 
  the 
  cyclone 
  type 
  from 
  

   which 
  the 
  spray 
  is 
  discharged 
  into 
  the 
  side 
  of 
  the 
  vine 
  on 
  the 
  trellis. 
  

  

  