﻿U. 
  S. 
  D. 
  A., 
  B. 
  E. 
  Bui. 
  116, 
  Part 
  II. 
  D 
  . 
  F 
  . 
  L 
  L> 
  i 
  ssue 
  d 
  December 
  18, 
  1912 
  

  

  PAPERS 
  ON 
  DECIDUOUS 
  FRUIT 
  INSECTS 
  AND 
  INSECTICIDES. 
  

  

  THE 
  GRAPE-BERRY 
  MOTH. 
  

  

  (Polychrosis 
  viteana 
  Clem.) 
  

  

  By 
  Fred 
  Johnson 
  and 
  A. 
  G. 
  Hammar, 
  

  

  Entomological 
  Assistants. 
  

  

  INTRODUCTION. 
  

  

  The 
  grape-berry 
  moth, 
  Polychrosis 
  viteana 
  Clem. 
  (PL 
  IV), 
  is 
  an 
  

   insect 
  enemy 
  of 
  the 
  grape 
  of 
  long 
  standing 
  in 
  the 
  vineyards 
  of 
  the 
  

   Lake 
  Erie 
  Valley. 
  Since 
  the 
  first 
  reports 
  of 
  its 
  serious 
  injury 
  to 
  

   the 
  grape 
  crop 
  near 
  Hudson, 
  Ohio, 
  in 
  1868, 
  it 
  has 
  been 
  an 
  almost 
  

   continual 
  menace 
  to 
  grape 
  production 
  in 
  vineyards 
  located 
  along 
  

   the 
  shores 
  of 
  Lake 
  Erie 
  from 
  Sandusky 
  in 
  Ohio 
  eastward 
  into 
  

   Pennsylvania 
  and 
  New 
  York. 
  Most 
  of 
  the 
  data 
  dealing 
  with 
  this 
  

   insect 
  cover 
  a 
  series 
  of 
  life-history 
  records 
  and 
  field 
  experiments 
  con- 
  

   ducted 
  during 
  the 
  seasons 
  from 
  1907 
  to 
  1909, 
  inclusive, 
  in 
  connec- 
  

   tion 
  with 
  the 
  investigations 
  of 
  the 
  grape 
  rootworm 
  and 
  other 
  insect 
  

   pests 
  of 
  the 
  grapevine 
  which 
  have 
  been 
  carried 
  on 
  at 
  North 
  East, 
  

   Pa., 
  by 
  the 
  section 
  of 
  the 
  Bureau 
  of 
  Entomology 
  engaged 
  in 
  decid- 
  

   ciduous 
  fruit 
  insect 
  investigations 
  under 
  the 
  direction 
  of 
  Mr. 
  A. 
  L. 
  

   Quaintance. 
  

  

  Before 
  entering 
  into 
  a 
  discussion 
  of 
  the 
  detailed 
  life4iistory 
  studies 
  

   and 
  remedial 
  measures, 
  a 
  brief 
  resume 
  of 
  an 
  historical 
  nature 
  is 
  given, 
  

   showing 
  the 
  attention 
  this 
  insect 
  has 
  received 
  from 
  earlier 
  entomolo- 
  

   gists. 
  In 
  treating 
  of 
  its 
  origin 
  and 
  distribution 
  it 
  is 
  pointed 
  out 
  that 
  

   for 
  many 
  years 
  it 
  was 
  confused 
  with 
  the 
  European 
  grape-berry 
  moth, 
  

   Eudemis 
  botrana 
  Schiff., 
  an 
  insect 
  which 
  is 
  very 
  destructive 
  to 
  the 
  

   berries 
  of 
  grapes 
  in 
  the 
  vineyards 
  of 
  southern 
  Europe 
  and 
  to 
  which 
  it 
  

   is 
  closely 
  related 
  and 
  bears 
  a 
  very 
  close 
  resemblance, 
  both 
  in 
  appear- 
  

   ance 
  and 
  in 
  the 
  manner 
  in 
  which 
  it 
  attacks 
  the 
  grape. 
  

  

  Earlier 
  entomologists 
  credited 
  the 
  grapo-borry 
  moth 
  with 
  having 
  a 
  

   number 
  of 
  food 
  plants, 
  but 
  the 
  studies 
  of 
  the 
  late 
  Prof. 
  M. 
  V. 
  Slinger- 
  

   land 
  in 
  J 
  903 
  and 
  1904 
  indicate 
  that 
  several 
  other 
  species 
  of 
  Polychrosis 
  

   have 
  been 
  confused 
  with 
  P. 
  viteana, 
  and 
  that 
  the 
  latter 
  feeds 
  and 
  repro- 
  

   duces 
  only 
  in 
  the 
  berries 
  of 
  grapes, 
  wild 
  and 
  cultivated. 
  His 
  conclu- 
  

   sions 
  are 
  borne 
  out 
  by 
  the 
  observations 
  made 
  during 
  this 
  investiga- 
  

   tion, 
  for 
  in 
  no 
  ease 
  has 
  this 
  insect 
  been 
  reared 
  from 
  anything 
  but 
  

  

  blossom 
  clusters 
  and 
  berries 
  of 
  the 
  grape. 
  

  

  15 
  

  

  