﻿THE 
  GEAPE-BERRY 
  MOTH. 
  49 
  

  

  DEGREE 
  OF 
  VINEYARD 
  INFESTATION 
  IN 
  ERIE 
  COUNTY, 
  PA. 
  

  

  The 
  infestation 
  of 
  vineyards 
  by 
  this 
  pest 
  is 
  by 
  no 
  means 
  general. 
  

   It 
  frequently 
  happens 
  that 
  serious 
  infestation 
  will 
  be 
  confined 
  to 
  one 
  

   or 
  two 
  rows 
  along 
  the 
  edge 
  of 
  a 
  vineyard 
  or 
  running 
  in 
  for 
  a 
  few 
  

   vines 
  at 
  the 
  end 
  of 
  a 
  number 
  of 
  rows, 
  or 
  again, 
  in 
  an 
  irregular 
  patch 
  

   at 
  the 
  corner 
  of 
  a 
  vineyard. 
  Usually 
  such 
  areas 
  of 
  very 
  serious 
  

   infestation 
  are 
  adjoining 
  hedgerows, 
  fences, 
  or 
  bordering 
  rough 
  

   lands 
  which 
  admit 
  of 
  the 
  accumulation 
  of 
  leaves 
  and 
  trash. 
  On 
  

   the 
  other 
  hand, 
  the 
  worst 
  infestation 
  over 
  a 
  large 
  area 
  coming 
  under 
  

   our 
  observation 
  was 
  in 
  a 
  vineyard 
  which 
  was 
  surrounded 
  by 
  neither 
  

   hedges 
  nor 
  ditches, 
  was 
  a 
  considerable 
  distance 
  from 
  woodlots 
  or 
  

   rough 
  land, 
  and 
  was 
  subject 
  to 
  clean 
  culture 
  and 
  excellent 
  care. 
  

   Again, 
  it 
  is 
  not 
  unusual 
  to 
  find 
  a 
  vineyard 
  portions 
  of 
  which 
  have 
  

   been 
  badly 
  infested 
  for 
  a 
  number 
  of 
  seasons 
  but 
  adjacent 
  vineyards 
  

   comparatively 
  free 
  from 
  infestation. 
  Because 
  of 
  this 
  seemingly 
  

   erratic 
  infestation 
  it 
  is 
  exceedingly 
  difficult 
  either 
  to 
  estimate 
  the 
  

   actual 
  damage 
  wrought 
  by 
  the 
  pest 
  or 
  to 
  secure 
  reliable 
  results 
  for 
  

   comparison 
  as 
  to 
  the 
  amount 
  of 
  benefit 
  from 
  remedial 
  treatment. 
  

   Another 
  result 
  of 
  this 
  erratic 
  infestation 
  is 
  that 
  the 
  vineyardist 
  

   will 
  minimize 
  the 
  extent 
  of 
  the 
  injury 
  or 
  even 
  entirely 
  overlook 
  it 
  

   until 
  picking 
  time, 
  when 
  he 
  is 
  astonished 
  to 
  discover 
  the 
  large 
  amount 
  

   of 
  damage 
  that 
  has 
  been 
  done. 
  When 
  this 
  abundant 
  evidence 
  of 
  

   injury 
  is 
  brought 
  so 
  clearly 
  to 
  his 
  attention 
  at 
  picking 
  time 
  he 
  is 
  

   likely 
  to 
  make 
  a 
  vow 
  to 
  take 
  some 
  steps 
  toward 
  the 
  eradication 
  of 
  

   the 
  pest 
  next 
  season, 
  but 
  only 
  too 
  often, 
  unless 
  the 
  first 
  brood 
  is 
  

   extremely 
  abundant, 
  the 
  period 
  for 
  effective 
  treatment 
  is 
  again 
  per- 
  

   mitted 
  to 
  slip 
  past 
  and 
  the 
  extent 
  of 
  injury 
  at 
  picking 
  time 
  is 
  likely 
  

   to 
  be 
  the 
  same 
  as 
  in 
  previous 
  years. 
  An 
  additional 
  result 
  of 
  this 
  

   somewhat 
  restricted 
  and 
  local 
  infestation 
  is 
  that 
  methods 
  of 
  control 
  

   of 
  the 
  pest 
  are 
  not 
  so 
  freely 
  discussed 
  among 
  the 
  vineyardists 
  and 
  

   there 
  is 
  not 
  the 
  impetus 
  of 
  a 
  general 
  effort 
  to 
  effect 
  its 
  control 
  that 
  

   there 
  is 
  in 
  the 
  endeavor 
  to 
  combat 
  an 
  insect 
  whose 
  injury 
  is 
  more 
  

   apparent 
  and 
  widespread, 
  as 
  in 
  the 
  case 
  of 
  the 
  grape 
  rootworm 
  and 
  

   the 
  grape 
  leafhopper. 
  

  

  The 
  statements 
  dealing 
  with 
  the 
  destructiveness 
  of 
  this 
  insect 
  in 
  

   the 
  preceding 
  paragraphs 
  apply 
  to 
  the 
  depredations 
  of 
  the 
  pest 
  in 
  

   the 
  vineyards 
  of 
  the 
  Lake 
  Erie 
  grape 
  belt, 
  where 
  local 
  conditions 
  

   have 
  been 
  studied 
  closely 
  for 
  several 
  seasons. 
  In 
  the 
  township 
  of 
  

   North 
  East, 
  Pa., 
  there 
  is 
  an 
  area 
  Stretching 
  east 
  of 
  the 
  town 
  to 
  the 
  

   New 
  York 
  State 
  line 
  and 
  lying 
  south 
  of 
  the 
  Lake 
  Shore 
  Railroad 
  in 
  

   which 
  are 
  located 
  the 
  vineyards 
  most 
  heavily 
  infested 
  by 
  the 
  grape- 
  

   berry 
  moth 
  in 
  this 
  region. 
  In 
  the 
  summer 
  of 
  I!)()() 
  one 
  Large 
  vine- 
  

   yard 
  was 
  visited 
  in 
  this 
  area 
  in 
  which 
  the 
  infestation 
  was 
  quite 
  gen- 
  

   eral 
  and 
  on 
  limited 
  portions 
  of 
  it 
  the 
  fruit 
  was 
  almost 
  unmarketable. 
  

  

  