﻿RESULTS 
  OF 
  SCOUTING 
  WOODLAND 
  AREA. 
  59 
  

  

  establishment 
  of 
  the 
  species, 
  although 
  the 
  selection 
  of 
  areas 
  contain- 
  

   ing 
  the 
  most 
  deciduous 
  growth 
  in 
  both 
  towns 
  aided 
  in 
  securing 
  more 
  

   satisfactory 
  data. 
  

  

  YVareham 
  was 
  found 
  infested 
  in 
  1905, 
  and 
  if 
  the 
  town 
  had 
  been 
  

   located 
  along 
  the 
  line 
  of 
  prevailing 
  winds 
  at 
  the 
  time 
  the 
  gipsy-moth 
  

   caterpillars 
  were 
  in 
  the 
  first 
  stage, 
  the 
  woodlands 
  would 
  probably 
  be 
  

   as 
  badly 
  infested 
  as 
  those 
  in 
  towns 
  an 
  equal 
  distance 
  north 
  or 
  north- 
  

   east 
  of 
  the 
  original 
  infested 
  area. 
  This 
  is 
  not 
  the 
  case, 
  however, 
  

   which 
  indicates 
  in 
  itself 
  that 
  unfavorable 
  food 
  and 
  practical 
  im- 
  

   munity 
  from 
  winds 
  favorable 
  for 
  spread 
  have 
  worked 
  to 
  the 
  advan- 
  

   tage 
  of 
  this 
  town. 
  

  

  The 
  same 
  statement 
  can 
  be 
  made 
  of 
  both 
  Gardner 
  and 
  Grafton, 
  

   which 
  were 
  found 
  infested 
  in 
  the 
  winter 
  of 
  1907-8- 
  It 
  is 
  true 
  that 
  

   there 
  are 
  a 
  considerable 
  number 
  of 
  small 
  roadside 
  and 
  orchard 
  infes- 
  

   tations 
  in 
  these 
  towns, 
  particularly 
  in 
  Grafton, 
  but 
  travel 
  is 
  heavy 
  

   during 
  the 
  early 
  summer 
  and 
  an 
  excellent 
  opportunity 
  is 
  offered 
  for 
  

   the 
  spread 
  of 
  the 
  larva? 
  on 
  vehicles 
  and 
  automobiles. 
  If 
  wind 
  spread 
  

   were 
  not 
  a 
  prime 
  factor 
  in 
  distributing 
  the 
  gipsy 
  moth, 
  the 
  woodland 
  

   in 
  Grafton 
  should 
  be 
  more 
  heavily 
  infested 
  than 
  the 
  wooded 
  area 
  

   examined 
  in 
  Milton, 
  N. 
  H., 
  because 
  the 
  latter 
  town 
  is 
  much 
  farther 
  

   from 
  the 
  original 
  center 
  of 
  infestation, 
  and 
  was 
  first 
  found 
  infested 
  a 
  

   year 
  later. 
  

  

  It 
  is 
  practically 
  impossible 
  to 
  explain 
  the 
  origin 
  of 
  many 
  separate 
  

   infestations; 
  but 
  taking 
  the 
  woodland 
  areas 
  examined 
  and 
  studying 
  

   them 
  in 
  relation 
  to 
  each 
  other 
  and 
  in 
  relation 
  to 
  the 
  badly 
  infested 
  

   area, 
  it 
  is 
  evident 
  that 
  the 
  theory 
  already 
  given 
  concerning 
  wind 
  

   spread 
  is 
  confirmed. 
  

  

  It 
  is 
  surprising, 
  when 
  all 
  the 
  facts 
  are 
  considered, 
  that 
  so 
  much 
  

   good 
  work 
  has 
  been 
  done 
  in 
  controlling 
  the 
  gipsy 
  moth 
  in 
  many 
  of 
  

   the 
  infested 
  towns. 
  Large 
  numbers 
  of 
  cases 
  are 
  on 
  record 
  where 
  all 
  

   the 
  infestations 
  in 
  a 
  town 
  have 
  practically 
  been 
  cleared 
  of 
  this 
  

   insect 
  in 
  a 
  single 
  year 
  ; 
  but, 
  owing 
  to 
  general 
  wind 
  spread, 
  as 
  many 
  

   and 
  usually 
  more 
  colonies 
  have 
  been 
  found 
  in 
  other 
  parts 
  of 
  the 
  

   same 
  town 
  the 
  next 
  year. 
  This 
  is 
  one 
  of 
  the 
  discouraging 
  features 
  of 
  

   the 
  work 
  and 
  lenders 
  it 
  extremely 
  difficult 
  to 
  control 
  the 
  insect 
  in 
  

   towns 
  which 
  are 
  most 
  subject 
  to 
  natural 
  spread 
  by 
  the 
  wind. 
  It 
  is 
  

   obvious 
  that 
  if 
  this 
  is 
  to 
  be 
  brought 
  about, 
  bad 
  colonies 
  must 
  be 
  

   subdued, 
  particularly 
  those 
  which 
  are 
  Dearest 
  the 
  outside 
  border 
  of 
  

   infestation, 
  because, 
  as 
  lias 
  already 
  been 
  pointed 
  out, 
  the 
  farther 
  the 
  

   Larvae 
  are 
  carried 
  by 
  the 
  wind 
  the 
  less 
  the 
  chance 
  1 
  becomes 
  for 
  them 
  to 
  

   establish 
  the 
  species, 
  owing 
  to 
  their 
  wide 
  separation 
  from 
  other 
  speci- 
  

   mens 
  and 
  the 
  limited 
  opportunity 
  of 
  their 
  finding 
  suitable 
  food 
  for 
  

  

  full 
  development. 
  

  

  