﻿56 
  

  

  DECIDUOUS 
  FRUIT 
  INSECTS 
  AND 
  INSECTICIDES. 
  

  

  Table 
  XXIII. 
  — 
  Progress 
  of 
  infestation 
  of 
  fruit 
  by 
  larvx 
  of 
  the 
  grape-berry 
  moth 
  in 
  

   experimental 
  plats. 
  Vineyard 
  of 
  Mr. 
  W. 
  S. 
  Wheeler, 
  North 
  East, 
  Pa., 
  1907. 
  

  

  FIRST 
  COUNT 
  OF 
  INFESTED 
  BERRIES 
  MADE 
  JULY 
  24. 
  

  

  Plat 
  

   No. 
  

  

  Date 
  of 
  spray 
  

   application. 
  

  

  Num- 
  

   ber 
  of 
  

   appli- 
  

   cations. 
  

  

  Spray 
  formula. 
  

  

  Num- 
  

   ber 
  of 
  

   vines 
  

   exam- 
  

   ined. 
  

  

  Total 
  

   number 
  

   of 
  clus- 
  

   ters. 
  

  

  Aver- 
  

   age 
  

   number 
  

   of 
  ber- 
  

   ries 
  per 
  

   cluster. 
  

  

  Num- 
  

   ber 
  of 
  

   infested 
  

   berries. 
  

  

  Total 
  

   number 
  

   of 
  ber- 
  

   ries 
  

   count- 
  

   ed. 
  

  

  Per- 
  

   centage 
  

   of 
  ber- 
  

   ries 
  in- 
  

   fested. 
  

  

  I 
  

  

  June 
  19, 
  July 
  8, 
  27. 
  

   . 
  .do 
  

  

  3 
  

   3 
  

   3 
  

   3 
  

   2 
  

   None. 
  

   2 
  

  

  5-5-3-50. 
  . 
  : 
  

  

  25 
  

   25 
  

   25 
  

   25 
  

   25 
  

   25 
  

   25 
  

  

  997 
  

   853 
  

   842 
  

   835 
  

   744 
  

   890 
  

   1,204 
  

  

  36 
  

   36 
  

   36 
  

   36 
  

   36 
  

   36 
  

   36 
  

  

  205 
  

   83 
  

   113 
  

   131 
  

   172 
  

   317 
  

   126 
  

  

  35,892. 
  

  

  30,708 
  

  

  30,312 
  

  

  30.000 
  

  

  26,784 
  

  

  32,040 
  

  

  43,344 
  

  

  0.45 
  

  

  II. 
  

  

  5-5-3-2-50 
  

  

  .27 
  

  

  III. 
  

   IV. 
  

  

  do 
  

  

  July 
  9, 
  27 
  

  

  5-6-1 
  qt.-2-50 
  

  

  5-6-1 
  qt.-50 
  

  

  5-6-1 
  qt.-2-50..... 
  

   None 
  

  

  .37 
  

   .43 
  

  

  v., 
  

  

  VI. 
  

  

  do 
  

  

  Unsprayed 
  

  

  July 
  9, 
  27 
  

  

  .64 
  

   .98 
  

  

  VII. 
  

  

  5-5-3-2-50 
  

  

  .29 
  

  

  

  

  

  

  SECOND 
  COUNT 
  OF 
  INFESTED 
  BERRIES 
  MADE 
  AUG. 
  29. 
  

  

  I. 
  

  

  II. 
  

  

  III. 
  

  

  IV. 
  

  

  V. 
  

  

  VI. 
  

  

  VII. 
  

  

  June 
  19, 
  July 
  8, 
  2 
  

  

  do 
  

  

  do 
  

  

  do 
  

  

  July 
  9, 
  27 
  

  

  Unsprayed 
  

  

  July 
  9, 
  27...'.... 
  

  

  3 
  

   3 
  

   3 
  

   3 
  

   2 
  

   None. 
  

  

  5-5-3-50 
  

  

  5-5-3-2-50. 
  . 
  . 
  . 
  

   5-6-1 
  qt.-2-50 
  

   5-6-1 
  qt.-50.. 
  

   5-6-1 
  qt.-2-50 
  

  

  None. 
  

  

  5-5-3-2-50. 
  . 
  . 
  . 
  

  

  25 
  

  

  997 
  

  

  36 
  

  

  662 
  

  

  35,892 
  

  

  25 
  

  

  853 
  

  

  36 
  

  

  337 
  

  

  30,708 
  

  

  25 
  

  

  842 
  

  

  36 
  

  

  432 
  

  

  30,312 
  

  

  25 
  

  

  835 
  

  

  36 
  

  

  330 
  

  

  30, 
  060 
  

  

  25 
  

  

  744 
  

  

  36 
  

  

  419 
  

  

  26,784 
  

  

  25 
  

  

  890 
  

  

  36 
  

  

  696 
  

  

  32,040 
  

  

  25 
  

  

  1,204 
  

  

  36 
  

  

  340 
  

  

  43,344 
  

  

  1.84 
  

   1.09 
  

   1.09 
  

   1.09 
  

   1.56 
  

   2.17 
  

   .78 
  

  

  THIRD 
  COUNT 
  OF 
  INFESTED 
  BERRIES 
  MADE 
  OCT. 
  9. 
  

  

  I. 
  

  

  II. 
  

  

  III. 
  

  

  IV. 
  

  

  V. 
  

  

  VI. 
  

  

  VII. 
  

  

  June 
  19, 
  July 
  8, 
  27 
  

  

  do 
  

  

  do 
  

  

  do 
  

  

  July 
  9, 
  27 
  

  

  Unsprayed 
  

  

  July 
  9, 
  27 
  

  

  3 
  

   3 
  

   3 
  

   3 
  

  

  2 
  

   None. 
  

  

  5-5-3-50 
  

  

  5-5-3-2-50. 
  . 
  . 
  . 
  

   5-6-1 
  qt.-2-50 
  

   5-6-1 
  qt.-50.. 
  

   5-6-1 
  qt.-2-50 
  

  

  None 
  

  

  5-5-3-2-50. 
  . 
  . 
  . 
  

  

  25 
  

  

  997 
  

  

  36 
  

  

  2,326 
  

  

  35, 
  892 
  

  

  25 
  

  

  853 
  

  

  36 
  

  

  1,751 
  

  

  30,708 
  

  

  25 
  

  

  842 
  

  

  36 
  

  

  1,503 
  

  

  30,312 
  

  

  25 
  

  

  835 
  

  

  36 
  

  

  1,083 
  

  

  30,060 
  

  

  25 
  

  

  744 
  

  

  36 
  

  

  1,681 
  

  

  26,784 
  

  

  25 
  

  

  890 
  

  

  36 
  

  

  3,549 
  

  

  32,040 
  

  

  25 
  

  

  1,204 
  

  

  36 
  

  

  1,910 
  

  

  43,344 
  

  

  6.45 
  

   5.70 
  

   4.95 
  

   3.60 
  

   6.27 
  

   11.07 
  

   4.40 
  

  

  FOURTH 
  COUNT 
  OF 
  INFESTED 
  BERRIES 
  MADE 
  OCT. 
  23. 
  

  

  I. 
  

   II. 
  

   III. 
  

   IV. 
  

  

  V. 
  

  

  VI. 
  

  

  VII. 
  

  

  June 
  19, 
  July 
  8, 
  27 
  

  

  do 
  

  

  do 
  

  

  do 
  

  

  July 
  9, 
  27 
  

  

  Unsprayed 
  

  

  July 
  9, 
  27 
  

  

  3 
  

   3 
  

   2 
  

  

  None. 
  

  

  5-5-3-50 
  

  

  5-5-3-2-50 
  

  

  5-6-1 
  qt.-2-50. 
  

   5-6-1 
  qt.-50... 
  

   5-6-1 
  qt.-2-50. 
  

   None 
  

  

  2 
  5-5-3-2-50. 
  

  

  25 
  

  

  997 
  

  

  36 
  

  

  4,655 
  

  

  27,544 
  

  

  25 
  

  

  853 
  

  

  36 
  

  

  2,295 
  

  

  25, 
  668 
  

  

  25 
  

  

  842 
  

  

  36 
  

  

  2,648 
  

  

  24, 
  552 
  

  

  25 
  

  

  835 
  

  

  36 
  

  

  2,295 
  

  

  24, 
  232 
  

  

  25 
  

  

  744 
  

  

  36 
  

  

  2,288 
  

  

  23, 
  562 
  

  

  25 
  

  

  890 
  

  

  36 
  

  

  3,149 
  

  

  23,000 
  

  

  25 
  

  

  1,204 
  

  

  36 
  

  

  2,338 
  

  

  36,980 
  

  

  16.90 
  

   9.51 
  

  

  10.78 
  

   9.74 
  

   9.71 
  

  

  13.69 
  

  

  In 
  making 
  these 
  counts 
  it 
  was 
  observed 
  that 
  the 
  infestation 
  was 
  

   very 
  irregular 
  throughout 
  this 
  block 
  of 
  vineyard. 
  The 
  first 
  two 
  or 
  

   three 
  rows 
  on 
  Plat 
  I 
  were 
  heavily 
  infested. 
  The 
  fruit 
  on 
  about 
  20 
  to 
  

   30 
  vines, 
  on 
  the 
  east 
  end 
  of 
  plats 
  I, 
  II, 
  and 
  III 
  was 
  also 
  quite 
  badly 
  

   infested. 
  Passing 
  through 
  Plats 
  V, 
  VI, 
  and 
  VII 
  and 
  toward 
  the 
  

   north 
  side 
  and 
  the 
  west 
  end 
  of 
  the 
  vineyard 
  the 
  infestation 
  was 
  much 
  

   lighter, 
  and 
  on 
  Plat 
  VII 
  and 
  the 
  extreme 
  west 
  end 
  of 
  Plats 
  IV, 
  V, 
  VI, 
  

   and 
  VII 
  the 
  infestation 
  was 
  very 
  light. 
  This 
  exceedingly 
  variable 
  

   condition 
  of 
  infestation 
  has 
  made 
  the 
  tabulation 
  of 
  results 
  very 
  

   difficult, 
  and 
  it 
  has 
  been 
  quite 
  impossible 
  to 
  bring 
  out 
  the 
  relative 
  

   value 
  of 
  the 
  different 
  poisons 
  used 
  and 
  the 
  value 
  of 
  the 
  varying 
  

   number 
  of 
  applications. 
  

  

  