﻿THE 
  GRAPE-BERRY 
  MOTH. 
  

  

  31 
  

  

  Table 
  I. 
  — 
  Time 
  of 
  emergence 
  of 
  moths 
  of 
  the 
  grape-berry 
  moth 
  in 
  the 
  spring 
  of 
  1909 
  at 
  

  

  North 
  East, 
  Pa. 
  

  

  Date 
  of 
  

  

  Num- 
  

  

  Date 
  of 
  

  

  Num- 
  

  

  Date 
  of 
  

  

  Num- 
  

  

  Date 
  of 
  

  

  Num- 
  

  

  Date 
  of 
  

  

  Num- 
  

  

  emer- 
  

  

  ber 
  of 
  

  

  emer- 
  

  

  ber 
  of 
  

  

  emer- 
  

  

  ber 
  of 
  

  

  emer- 
  

  

  ber 
  of 
  

  

  emer- 
  

  

  ber 
  of 
  

  

  gence. 
  

  

  moths. 
  

  

  gence. 
  

  

  moths. 
  

  

  gence. 
  

  

  moths. 
  

  

  gence. 
  

  

  moths. 
  

  

  gence. 
  

  

  moths. 
  

  

  June 
  3 
  

  

  1 
  

  

  June 
  18 
  

  

  18 
  

  

  July 
  1 
  

  

  19 
  

  

  July 
  14 
  

  

  3 
  

  

  July 
  30 
  

  

  1 
  

  

  6 
  

  

  2 
  

  

  19 
  

  

  17 
  

  

  2 
  

  

  18 
  

  

  15 
  

  

  2 
  

  

  31 
  

  

  1 
  

  

  7 
  

  

  3 
  

  

  20 
  

  

  23 
  

  

  3 
  

  

  4 
  

  

  16 
  

  

  6 
  

  

  Aug. 
  1 
  

  

  

  

  8 
  

  

  5 
  

  

  21 
  

  

  32 
  

  

  4 
  

  

  11 
  

  

  17 
  

  

  3 
  

  

  2 
  

  

  

  

  9 
  

  

  1 
  

  

  22 
  

  

  22 
  

  

  5 
  

  

  9 
  

  

  19 
  

  

  2 
  

  

  3 
  

  

  

  

  10 
  

  

  2 
  

  

  23 
  

  

  25 
  

  

  6 
  

  

  4 
  

  

  20 
  

  

  1 
  

  

  4 
  

  

  1 
  

  

  11 
  

  

  4 
  

  

  24 
  

  

  21 
  

  

  7 
  

  

  14 
  

  

  22 
  

  

  2 
  

  

  5 
  

  

  

  

  12 
  

   13 
  

  

  3 
  

  

  7 
  

  

  25 
  

   26 
  

  

  23 
  

   24 
  

  

  8 
  

   9 
  

  

  3 
  

  

  4 
  

  

  23 
  

   24 
  

  

  

   

  

  

  

  Total 
  . 
  

  

  507 
  

  

  14 
  

  

  17 
  

  

  27 
  

  

  9 
  

  

  10 
  

  

  11 
  

  

  25 
  

  

  

  

  

  

  15 
  

  

  5 
  

  

  28 
  

  

  23 
  

  

  11 
  

  

  6 
  

  

  26 
  

  

  1 
  

  

  

  

  16 
  

  

  14 
  

  

  29 
  

  

  29 
  

  

  12 
  

  

  6 
  

  

  27 
  

  

  1 
  

  

  

  

  17 
  

  

  26 
  

  

  30 
  

  

  6 
  

  

  13 
  

  

  12 
  

  

  28 
  

  

  

  

  

  

  Since 
  the 
  blossoming 
  period 
  of 
  the 
  grape 
  in 
  the 
  Lake 
  Erie 
  Valley 
  

   occurs 
  usually 
  from 
  June 
  13 
  to 
  June 
  20, 
  this 
  emergence 
  record 
  of 
  the 
  

   spring 
  moths 
  indicates 
  that 
  the 
  maximum 
  emergence 
  takes 
  place 
  

   during 
  and 
  after 
  the 
  blossoming 
  period. 
  This 
  record 
  also 
  indicates 
  

   that 
  the 
  small 
  percentage 
  of 
  webs 
  containing 
  larvae 
  found 
  in 
  the 
  

   blossom 
  clusters 
  does 
  not 
  represent 
  the 
  full 
  spring 
  brood 
  from 
  spring- 
  

   emerging 
  moths, 
  as 
  has 
  been 
  supposed 
  by 
  some 
  investigators, 
  but 
  

   merely 
  represents 
  the 
  offspring 
  of 
  a 
  very 
  small 
  percentage 
  of 
  the 
  

   earliest 
  appearing 
  moths. 
  

  

  Oviposition 
  of 
  spring-emerging 
  moths 
  in 
  confinement. 
  — 
  The 
  female 
  

   grape-berry 
  moth 
  does 
  not 
  oviposit 
  readily 
  in 
  confinement, 
  which 
  

   accounts 
  for 
  the 
  somewhat 
  meager 
  oviposition 
  records 
  obtained. 
  

   No 
  eggs 
  were 
  observed 
  in 
  our 
  rearing 
  cages 
  until 
  the 
  berries 
  of 
  the 
  

   grape 
  were 
  formed 
  and 
  those 
  found 
  were 
  always 
  deposited 
  upon 
  the 
  

   berries. 
  

  

  Table 
  II. 
  

  

  -Oviposition 
  of 
  spring 
  moths 
  of 
  the 
  grape-berry 
  moth 
  in 
  stock 
  jars 
  at 
  North, 
  

   East, 
  Pa., 
  1909. 
  

  

  No. 
  of 
  

  

  Number 
  

  

  Date 
  of— 
  

  

  

  Days— 
  

  

  

  

  

  

  

  From 
  

  

  stock 
  jar. 
  

  

  of 
  moths. 
  

  

  Emer- 
  

  

  First 
  

  

  Last 
  

  

  Before 
  

  

  Of 
  ovi- 
  

   position. 
  

  

  emer- 
  

  

  

  

  gence 
  of 
  

  

  op- 
  

  

  ovi- 
  

  

  ovi- 
  

  

  gence 
  to 
  

  

  

  

  moths. 
  

  

  position. 
  

  

  position. 
  

  

  position. 
  

  

  last 
  ovi- 
  

  

  

  

  

  

  

  

  

  position. 
  

  

  1 
  

  

  10 
  

  

  June 
  17 
  

  

  July 
  1 
  

  

  July 
  5 
  

  

  14 
  

  

  5 
  

  

  18 
  

  

  2 
  

  

  30 
  

  

  June 
  18 
  

  

  June 
  24 
  

  

  July 
  2 
  

  

  6 
  

  

  9 
  

  

  14 
  

  

  3 
  

  

  15 
  

  

  June 
  19 
  

  

  ...do.... 
  

  

  June 
  30 
  

  

  5 
  

  

  7 
  

  

  11 
  

  

  4 
  

  

  20 
  

  

  June 
  20 
  

  

  June 
  30 
  

  

  ...do.... 
  

  

  10 
  

  

  1 
  

  

  10 
  

  

  5 
  

  

  16 
  

  

  /June 
  21 
  

   \June 
  22 
  

  

  jjune 
  25 
  

  

  July 
  5 
  

  

  4 
  

  

  11 
  

  

  11 
  

  

  6 
  

  

  12 
  

  

  June 
  23 
  

  

  June 
  27 
  

  

  July 
  7 
  

  

  4 
  

  

  11 
  

  

  14 
  

  

  7 
  

  

  16 
  

  

  June 
  24 
  

  

  July 
  l 
  

  

  July 
  1 
  

  

  7 
  

  

  1 
  

  

  7 
  

  

  8 
  

  

  20 
  

  

  June 
  25 
  

  

  June 
  29 
  

  

  July 
  8 
  

  

  4 
  

  

  10 
  

  

  13 
  

  

  9 
  

  

  23 
  

  

  June 
  28 
  

  

  June 
  30 
  

  

  July 
  12 
  

  

  4 
  

  

  13 
  

  

  16 
  

  

  10 
  

  

  29 
  

  

  June 
  29 
  

  

  July 
  7 
  

  

  July 
  9 
  

  

  8 
  

  

  8 
  

  

  10 
  

  

  

  

  

  

  6.6 
  

  

  7.1 
  

  

  12.7 
  

  

  Max 
  

  

  

  

  

  1 
  1 
  

   4 
  

  

  L8 
  

  

  18 
  

  

  Min 
  

  

  

  

  

  1 
  7 
  

  

  

  

  

  

  

  

  