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  THE 
  DISPERSION 
  OF 
  THE 
  GIPSY 
  MOTH. 
  

  

  The 
  result 
  in 
  Wareham 
  indicates 
  that 
  there 
  may 
  have 
  been 
  some 
  

   dispersion 
  by 
  the 
  wind, 
  but 
  only 
  a 
  few 
  of 
  the 
  colonies 
  can 
  be 
  ac- 
  

   counted 
  for 
  in 
  that 
  way. 
  

  

  RESULTS 
  OF 
  SCOUTING 
  WOODLAND 
  AREA. 
  

  

  On 
  the 
  whole, 
  the 
  number 
  of 
  woodland 
  infestations 
  found 
  is 
  not 
  

   so 
  large 
  as 
  might 
  be 
  expected. 
  Those 
  at 
  Milton, 
  N. 
  H., 
  and 
  Yar- 
  

   mouth, 
  Me., 
  are 
  the 
  most 
  striking, 
  probably 
  furnishing 
  the 
  most 
  

   definite 
  results 
  of 
  any 
  of 
  the 
  towns 
  under 
  consideration. 
  Owing 
  

   to 
  the 
  long 
  distance 
  from 
  Lisbon, 
  Me., 
  to 
  the 
  nearest 
  badly 
  infested 
  

   area, 
  which 
  is 
  about 
  70 
  miles, 
  and 
  to 
  the 
  large 
  quantity 
  of 
  unfavor- 
  

   able 
  food 
  for 
  the 
  caterpillars, 
  it 
  is 
  not 
  surprising 
  that 
  little 
  evidence 
  

   was 
  secured 
  to 
  show 
  that 
  the 
  infestations 
  were 
  caused 
  by 
  the 
  wind. 
  

   The 
  other 
  infestations 
  in 
  the 
  town, 
  however, 
  indicate 
  that 
  there 
  may 
  

   have 
  been 
  a 
  short-distance 
  spread 
  in 
  this 
  way. 
  In 
  Yarmouth, 
  Me.. 
  

   the 
  proportion 
  of 
  coniferous 
  growth 
  was 
  practically 
  the 
  same 
  as 
  

   that 
  in 
  Milton, 
  N. 
  H., 
  but 
  the 
  wooded 
  area 
  examined 
  was 
  only 
  

   about 
  one-fourth 
  of 
  that 
  scouted 
  in 
  the 
  latter 
  town. 
  Oak 
  trees, 
  

   however, 
  predominate 
  in 
  the 
  Avoodland 
  in 
  Yarmouth; 
  hence 
  it 
  is 
  

   not 
  surprising 
  that 
  a 
  larger 
  number 
  of 
  colonies 
  were 
  found 
  in 
  that 
  

   town 
  than 
  in 
  Lisbon. 
  More 
  woodland 
  colonies 
  were 
  found 
  in 
  Milton 
  

   than 
  in 
  any 
  other 
  town, 
  and 
  this 
  is 
  what 
  would 
  naturally 
  be 
  expected, 
  

   as 
  it 
  is 
  near 
  badly 
  infested 
  towns 
  and 
  is 
  located 
  so 
  that 
  the 
  prevail- 
  

   ing 
  wind 
  Avould 
  convey 
  large 
  numbers 
  of 
  the 
  small 
  caterpillars. 
  The 
  

   woodland 
  examined 
  contained 
  only 
  about 
  13 
  per 
  cent 
  of 
  oak. 
  If 
  this 
  

   species 
  had 
  been 
  as 
  abundant 
  in 
  Milton 
  as 
  it 
  was 
  in 
  Yarmouth 
  far 
  

   more 
  serious 
  infestations 
  would 
  probably 
  have 
  resulted. 
  

  

  Scouting 
  in 
  Tilton 
  indicates 
  that 
  good 
  work 
  was 
  done 
  in 
  suppress- 
  

   ing 
  the 
  gipsy 
  moth 
  during 
  1910 
  and 
  1911. 
  The 
  town 
  is 
  located 
  a 
  

   little 
  out 
  of 
  the 
  line 
  of 
  wind 
  dispersion, 
  and 
  this, 
  coupled 
  with 
  care- 
  

   ful 
  hand 
  work, 
  has 
  evidently 
  resulted 
  in 
  the 
  satisfactory 
  condition 
  

   which 
  has 
  been 
  reported. 
  

  

  The 
  results 
  in 
  Bennington, 
  N. 
  H., 
  a 
  town 
  which 
  is 
  located 
  on 
  high 
  

   land, 
  where 
  21 
  per 
  cent 
  of 
  the 
  trees 
  are 
  oak, 
  point 
  strongly 
  to 
  the 
  

   fact 
  that 
  the 
  woodlands 
  do 
  not 
  become 
  infested 
  rapidly 
  when 
  they 
  

   are 
  located 
  in 
  a 
  region 
  unfavorable 
  for 
  larval 
  spread 
  by 
  the 
  wind. 
  

   Although 
  about 
  5 
  square 
  miles 
  were 
  examined 
  in 
  this 
  town, 
  no 
  

   woodland 
  infestation 
  was 
  found; 
  and 
  when 
  it 
  is 
  remembered 
  that 
  

   this 
  area 
  is 
  less 
  than 
  10 
  miles 
  from 
  towns 
  which 
  were 
  found 
  infested 
  

   in 
  1908 
  and 
  1909, 
  the 
  evidence 
  is 
  further 
  strengthened. 
  The 
  danger 
  

   of 
  artificial 
  spread 
  of 
  gipsy-moth 
  caterpillars 
  on 
  vehicles 
  is 
  probably 
  

   less 
  in 
  this 
  town 
  than 
  in 
  any 
  of 
  the 
  towns 
  where 
  woodland 
  areas 
  

   have 
  been 
  scouted. 
  

  

  The 
  scouting 
  in 
  Gardner 
  and 
  Wareham, 
  Mass., 
  was 
  handicapped 
  

   by 
  the 
  fact 
  that 
  the 
  woodland 
  growth 
  was 
  not 
  satisfactory 
  for 
  the 
  

  

  