﻿THE 
  GRAPE-BERRY 
  MOTH. 
  

  

  59 
  

  

  Table 
  XXV. 
  — 
  Process 
  of 
  infestation 
  of 
  fruit 
  by 
  larvae 
  of 
  the 
  grape-berry 
  moth 
  in 
  experi- 
  

   mental 
  plats. 
  Vineyard 
  of 
  Mr. 
  W.S. 
  Wheeler, 
  North 
  East, 
  Pa., 
  1908 
  — 
  Continued. 
  

  

  SECOND 
  COUNT 
  OF 
  INFESTED 
  BERRIES, 
  MADE 
  ON 
  SEPTEMBER 
  24 
  TO 
  26. 
  

  

  Plat 
  No. 
  

  

  Date 
  of 
  spray 
  application. 
  

  

  Spray 
  formula. 
  

  

  Number 
  

   of 
  appli- 
  

   cations. 
  

  

  Number 
  

   of 
  vines 
  

   exam- 
  

   ined. 
  

  

  Number 
  

  

  of 
  in- 
  

   fested 
  

  

  berries. 
  

  

  T 
  

  

  

  5_5_3_2_5() 
  

  

  2 
  

   3 
  

   2 
  

  

  25 
  

   25 
  

   25 
  

   25 
  

  

  1,855 
  

  

  1,440 
  

  

  1,095 
  

  

  960 
  

  

  [I 
  

  

  June 
  4, 
  18, 
  19; 
  July 
  <>.... 
  

   July 
  t> 
  

  

  5_5_3_2-50 
  

  

  III 
  

  

  5_5_3_2-50... 
  

  

  IV 
  

  

  June 
  19 
  

  

  5_5_3_2_50... 
  

  

  

  

  

  

  

  FIRST 
  COUNT 
  OF 
  INFESTED 
  BERRIES 
  MADE 
  ON 
  AUGUST 
  3,4. 
  

  

  V 
  a-b. 
  . 
  

   Do. 
  

   Do. 
  

   Do. 
  

  

  Unsprayed. 
  

  

  do 
  

  

  ...do 
  

  

  ....do 
  

  

  Xone... 
  

   ....do: 
  

   ....do-. 
  

  

  ...do.. 
  

  

  None. 
  

  

  25 
  

  

  None. 
  

  

  25 
  

  

  None. 
  

  

  25 
  

  

  None. 
  

  

  25 
  

  

  387 
  

  

  198 
  

   153 
  

  

  67 
  

  

  SECOND 
  COUNT 
  OF 
  INFESTED 
  BERRIES, 
  MADE 
  ON 
  SEPTEMBER 
  24 
  TO 
  26. 
  

  

  Ya-o.. 
  

   Do. 
  

   Do. 
  

   Do. 
  

  

  Unsprayed. 
  

  

  do 
  

  

  do 
  

  

  do 
  

  

  None.. 
  

  

  do. 
  

  

  do. 
  

  

  do. 
  

  

  None. 
  

  

  25 
  

  

  None. 
  

  

  25 
  

  

  None. 
  

  

  25 
  

  

  None. 
  

  

  25 
  

  

  4.495 
  

   2,899 
  

   2.466 
  

   1.588 
  

  

  When 
  th'e 
  fruit 
  was 
  harvested 
  the 
  crop 
  from 
  the 
  sprayed 
  and 
  from 
  

   the 
  unsprayed 
  plats 
  was 
  weighed. 
  Table 
  XXVI, 
  in 
  the 
  columns 
  

   under 
  "Yield 
  in 
  pounds 
  of 
  fruit 
  per 
  acre," 
  shows 
  the 
  difference 
  in 
  

   crop 
  yield 
  per 
  acre 
  on 
  the 
  sprayed 
  and 
  the 
  unsprayed 
  plats. 
  The 
  

   last 
  column 
  also 
  shows 
  the 
  cash 
  value 
  of 
  the 
  increased 
  yield 
  per 
  acre 
  

   on 
  the 
  sprayed 
  vines. 
  

  

  Table 
  XXVI. 
  — 
  Amount 
  of 
  fruit 
  infested 
  by 
  the 
  grape-berry 
  moth 
  on 
  sprayed 
  and 
  unsprayed 
  

   plats 
  and 
  cash 
  value 
  of 
  spray 
  benefit 
  per 
  acre. 
  Vineyard 
  of 
  Mr. 
  W. 
  S. 
  Wheeler, 
  North 
  

   East, 
  Pa., 
  1908. 
  

  

  Plat 
  No. 
  

  

  Date 
  of 
  spray 
  ap- 
  

   plications. 
  

  

  I 
  fune 
  4, 
  June 
  is. 
  

  

  Va 
  Vb 
  I'nsprayed 
  

  

  II 
  

  

  Va- 
  Vb. 
  

  

  Ill 
  

  

  Va 
  Vb. 
  

  

  iv 
  

  

  Va-Vb. 
  

  

  June 
  4, 
  June 
  18, 
  

   July 
  (i. 
  

  

  i 
  rnsprayed 
  

  

  June 
  19, 
  July 
  <i... 
  

  

  Unsprayed 
  

  

  June 
  19 
  

  

  i'nsprayed 
  

  

  Number 
  

   of 
  appli- 
  

  

  Spray 
  formula. 
  

  

  5-5-3-2-50. 
  

  

  5-5-3-2-50. 
  

  

  5-5-3-2-50. 
  

  

  5-5-3-2-50. 
  

  

  Average 
  

   number 
  

  

  of 
  ber- 
  

   ries 
  per 
  

   cluster. 
  

  

  Total 
  

   number 
  

  

  of 
  clus- 
  

   ters. 
  

  

  2.312 
  

   3,858 
  

   3,374 
  

  

  2,294 
  

   2,235 
  

   1,914 
  

   1,751 
  

  

  1.796 
  

  

  Number 
  

   of 
  vines 
  

  

  ex- 
  

   amined. 
  

  

  IM.it 
  No. 
  

  

  Total 
  Total 
  

  

  number 
  number 
  

  

  of 
  ber- 
  of 
  wormy 
  

  

  ries. 
  berries." 
  

  

  83,232 
  

   Va 
  Vb... 
  102 
  588 
  

  

  II 
  85,464 
  

   Va 
  Vb. 
  

  

  III 
  ... 
  B0 
  160 
  

   Va 
  Vb 
  "is. 
  'Hit 
  

  

  IV 
  ... 
  83,136 
  

  

  i 
  

  

  ). 
  152 
  

   11,989 
  

   ;. 
  168 
  

   7,733 
  

   2,632 
  

   8,677 
  

   2,309 
  

   1. 
  136 
  

  

  Percent 
  

   of 
  wormy 
  

  

  berries." 
  

  

  11.6 
  

  

  1. 
  1 
  

  

  9. 
  a 
  

   3. 
  a 
  

  

  3. 
  6 
  

  

  Date 
  of 
  

  

  exami- 
  

   nation 
  

  

  Yield 
  in 
  pounds 
  of 
  

   fruit 
  per 
  acre. 
  

  

  Sprayed. 
  

  

  Sept. 
  26 
  

  

  s 
  

  

  .do 
  

   do 
  

   .do 
  

  

  do 
  

   la 
  

  

  1.175 
  

  

  

  Unsprayed. 
  

  

  3,010 
  

   2, 
  166 
  

  

  Casb 
  Rain 
  in 
  

   yield 
  of 
  fruit 
  

   on 
  sprayed 
  

  

  plats 
  per 
  acre 
  

   cents 
  

  

  per 
  pound). 
  

  

  12. 
  12 
  

   ! 
  1.08 
  

  

  