﻿48 
  

  

  DECIDUOUS 
  FRUIT 
  INSECTS 
  AND 
  INSECTICIDES. 
  

  

  Table 
  XXI. 
  — 
  Parasites 
  reared 
  from 
  the 
  grape-berry 
  moth 
  (Polycrosis 
  viteana) 
  feeding 
  

   upon 
  the 
  fruit 
  of 
  wild 
  and 
  cultivated 
  grapes 
  at 
  North 
  East, 
  Pa., 
  1906-1911. 
  

  

  Family. 
  

  

  Date 
  of 
  emergence. 
  

  

  Stage 
  of 
  

   host. 
  

  

  Number 
  

   of 
  speci- 
  

   mens 
  

   reared. 
  

  

  Previously 
  recorded 
  hosts. 
  

  

  BRACONIIXE. 
  

  

  Microbracon 
  mellitor 
  Say 
  

  

  Microbracon 
  dorsator 
  Say 
  

  

  Apanteles 
  sp 
  

  

  Aug. 
  6-19, 
  1909.... 
  

  

  Aug.3-Sept.l,1911. 
  

   Aug. 
  12, 
  1911 
  

  

  Larva... 
  

  

  ...do 
  

  

  ...do 
  

  

  15 
  

  

  9 
  

   1 
  

   4 
  

   1 
  

  

  1 
  

   2 
  

  

  1 
  

   2 
  

   2 
  

   1 
  

   2 
  

   1 
  

   27 
  

   21 
  

   3 
  

   2 
  

  

  Many 
  species 
  of 
  Coleoptera 
  

   and 
  Lepidoptera. 
  

   Do. 
  

  

  Ascogaster 
  carpocapsse 
  Vier 
  

  

  Meteorus 
  sp 
  

  

  Aug. 
  14, 
  1911 
  

  

  Aug. 
  9, 
  1909 
  

  

  July 
  13,1906 
  

  

  Aug. 
  5, 
  1911 
  

  

  July 
  13, 
  1908 
  

  

  Pupa 
  

  

  Larva 
  or 
  

   pupa. 
  

  

  Larva... 
  

   ...do 
  

  

  do... 
  

  

  Carpocapsa 
  pomonella. 
  

  

  ICHNEUMONTDjE. 
  

  

  Do 
  

  

  Epiurus 
  indagator 
  var. 
  nigrifrons 
  

   Vier. 
  

  

  Do. 
  

   Do. 
  

  

  Omorgus 
  nolae 
  Ashm. 
  race 
  

  

  Dioctes 
  obliteratus 
  Cress 
  

  

  Sept. 
  13, 
  1907 
  

  

  Aug. 
  16-22, 
  1909... 
  

  

  July 
  13, 
  1906 
  

  

  July 
  21, 
  1907.. 
  . 
  

  

  ...do 
  

  

  ...do 
  

  

  Pupa 
  — 
  

   . 
  do 
  

  

  Nolasp., 
  apyralid 
  

  

  

  Do. 
  

  

  Dioctes 
  obliteratus 
  Cress 
  

  

  July 
  22, 
  1908 
  

  

  ...do 
  

  

  

  

  Aug. 
  2-27, 
  1909.... 
  

   Aug. 
  2-27, 
  1911.... 
  

   Aug. 
  24, 
  1909 
  

  

  ...do 
  

  

  ...do 
  

  

  ...do.... 
  

  

  Do. 
  

  

  

  Do. 
  

  

  

  

  Itoplectis 
  conquisitor 
  Say 
  

  

  Aug. 
  3, 
  1911 
  

  

  ...do 
  

  

  Many 
  species 
  of 
  tortricids, 
  

   noctuids, 
  bombycids, 
  and 
  

   tineids. 
  

  

  In 
  glancing 
  over 
  this 
  table 
  it 
  will 
  be 
  observed 
  that 
  the 
  parasite 
  

   reared 
  in 
  greatest 
  numbers 
  from 
  the 
  grape-berry 
  moth 
  was 
  Dioctes 
  

   obliteratus 
  Cress. 
  Mr. 
  Viereck 
  states 
  that 
  the 
  supposedly 
  new 
  species 
  

   reared 
  by 
  Prof. 
  Slingerland 
  in 
  1904 
  and 
  named 
  by 
  Dr. 
  William 
  H. 
  

   Ashmead 
  x 
  as 
  TJiymaris 
  sling 
  erlandana 
  Ashm. 
  (see 
  fig. 
  16) 
  is 
  the 
  

   same 
  as 
  Dioctes 
  obliteratus 
  Cress. 
  The 
  largest 
  number 
  of 
  parasite 
  

   specimens 
  reared 
  by 
  Prof. 
  Slingerland 
  belonged 
  to 
  this 
  species 
  ; 
  hence 
  

   it 
  is 
  very 
  probable 
  that 
  it 
  is 
  quite 
  widely 
  disseminated 
  throughout 
  the 
  

   vineyards 
  of 
  the 
  Chautauqua 
  County 
  grape 
  belt 
  wherever 
  the 
  grape- 
  

   berry 
  moth 
  abounds, 
  and 
  is 
  perhaps 
  the 
  most 
  effective 
  enemy 
  of 
  the 
  

   grape-berry 
  moth 
  of 
  all 
  of 
  the 
  parasites 
  mentioned 
  in 
  this 
  list. 
  

  

  In 
  addition 
  to 
  the 
  parasites 
  previously 
  mentioned 
  as 
  attacking 
  the 
  

   larvae 
  and 
  pupae, 
  on 
  September 
  7, 
  1906, 
  a 
  large 
  number 
  of 
  parasitized 
  

   eggs 
  of 
  the 
  grape-berry 
  moth 
  were 
  found 
  in 
  a 
  badly 
  infested 
  portion 
  

   of 
  the 
  vineyard 
  of 
  Mr. 
  W. 
  S. 
  Wheeler 
  at 
  North 
  East, 
  Pa. 
  A 
  num- 
  

   ber 
  of 
  adults 
  were 
  reared 
  from 
  these 
  parasitized 
  eggs 
  and 
  later 
  

   identified 
  by 
  Dr. 
  Howard 
  as 
  Trichogramma 
  pretiosa 
  Riley. 
  This 
  is 
  

   the 
  first 
  record 
  of 
  parasitized 
  eggs 
  of 
  this 
  insect 
  that 
  has 
  come 
  to 
  our 
  

   notice, 
  and 
  it 
  is 
  the 
  only 
  instance 
  in 
  which 
  this 
  condition 
  has 
  been 
  

   observed 
  during 
  this 
  investigation. 
  

  

  1 
  Can. 
  Ent., 
  vol. 
  36, 
  pp. 
  333-334, 
  November, 
  1904. 
  

  

  