﻿393 
  

  

  If 
  the 
  plant 
  is 
  pulled 
  directly 
  from 
  the 
  soil 
  the 
  lice 
  will 
  remain 
  in 
  the 
  

   ground, 
  being 
  stripped 
  from 
  the 
  roots. 
  Infested 
  plants 
  are 
  easily 
  

   recognised 
  by 
  their 
  stunted 
  and 
  wilted 
  appearance, 
  as 
  the 
  lice 
  suck 
  

   the 
  juices 
  from 
  the 
  young 
  tap 
  roots. 
  Ants 
  are 
  responsible 
  for 
  the 
  

   spreading 
  of 
  this 
  pest 
  and 
  they 
  consequently 
  must 
  be 
  looked 
  on 
  as 
  

   enemies 
  instead 
  of 
  friends. 
  As 
  a 
  temporary 
  control 
  measure 
  it 
  is 
  

   advisable 
  to 
  carry 
  out 
  a 
  system 
  of 
  shallow 
  cultivation 
  in 
  spring 
  when 
  

   the 
  ants 
  are 
  first 
  noticed 
  to 
  be 
  excavating 
  about 
  the 
  young 
  plants, 
  

   and 
  this 
  should 
  be 
  repeated 
  every 
  week 
  during 
  dry 
  weather 
  and 
  as 
  

   soon 
  as 
  the 
  soil 
  will 
  permit 
  after 
  rain. 
  Thus 
  the 
  ants 
  are 
  thoroughly 
  

   disorganised 
  and 
  are 
  prevented 
  from 
  nursing 
  the 
  cotton 
  root 
  louse. 
  

   This 
  process 
  should 
  be 
  kept 
  up 
  until 
  the 
  soil 
  is 
  in 
  a 
  good 
  growing 
  

   condition 
  and 
  the 
  cotton 
  thoroughly 
  established. 
  The 
  best 
  permanent 
  

   control 
  measure 
  yet 
  found 
  is 
  a 
  carefully 
  planned 
  system 
  of 
  rotation 
  

   of 
  at 
  least 
  3 
  years' 
  duration 
  ; 
  cotton 
  should 
  not 
  follow 
  cotton 
  or 
  maize, 
  

   but 
  a 
  crop 
  of 
  small 
  grain 
  and 
  cowpea 
  hay 
  should 
  precede 
  the 
  crop 
  on 
  

   badly 
  infested 
  lands. 
  Judge 
  C. 
  A. 
  Woods, 
  at 
  Marion, 
  has 
  used 
  the 
  

   following 
  rotation 
  with 
  marked 
  success 
  : 
  — 
  Maize 
  followed 
  by 
  oats 
  

   and 
  cowpea 
  hay, 
  followed 
  by 
  cotton 
  in 
  the 
  third 
  year, 
  and 
  this 
  in 
  5 
  

   years 
  has 
  reduced 
  a 
  bad 
  infestation 
  to 
  practically 
  nothing. 
  It 
  is 
  of 
  

   great 
  value 
  to 
  have 
  a 
  winter 
  cover 
  crop 
  upon 
  the 
  infested 
  land 
  at 
  all 
  

   times 
  and 
  so 
  prevent 
  the 
  winter 
  food-plants 
  of 
  this 
  louse 
  growing 
  upon 
  

   it. 
  So 
  far 
  repellents 
  have 
  been 
  of 
  little 
  value 
  as 
  remedial 
  measures. 
  

   This 
  is 
  especially 
  true 
  of 
  tobacco 
  products, 
  which 
  have 
  been 
  carefully 
  

   investigated 
  under 
  varying 
  conditions 
  at 
  the 
  Marion 
  laboratory. 
  Some 
  

   of 
  the 
  products 
  used 
  in 
  the 
  experiment 
  were 
  " 
  nicotocide," 
  '" 
  nicofume 
  " 
  

   liquid, 
  rose 
  leaf, 
  tobacco 
  dust, 
  etc. 
  The 
  latter 
  seemed 
  to 
  have 
  no 
  

   deterrent 
  effect 
  on 
  either 
  the 
  root 
  lice 
  or 
  their 
  attendant 
  ants, 
  especially 
  

   in 
  field 
  experiments 
  where 
  the 
  ants 
  have 
  been 
  know^n 
  to 
  burrow^ 
  

   through 
  IJ 
  inches 
  of 
  fresh 
  tobacco-dust 
  in 
  constructing 
  their 
  nests^ 
  

   with 
  no 
  injury. 
  Further 
  experiments 
  with 
  cultural 
  methods 
  are 
  now 
  

   in 
  progress. 
  

  

  [Britton 
  (W. 
  E.). 
  The 
  Brown-Tail 
  Moth. 
  — 
  Connecticut 
  Agric. 
  Expt. 
  

   Sta., 
  New 
  Haven, 
  Bull 
  182, 
  March 
  1914, 
  25 
  pp., 
  16 
  figs. 
  

  

  The 
  purpose 
  of 
  this 
  bulletin 
  is 
  to 
  give 
  a 
  brief 
  summary 
  of 
  the 
  in- 
  

   formation 
  that 
  has 
  been 
  accumulated 
  concerning 
  this 
  pest. 
  Up 
  to 
  date 
  

   (February 
  1914) 
  the 
  brow^n-tail 
  moth 
  has 
  spread 
  over 
  the 
  following 
  

   territory 
  : 
  — 
  The 
  southern 
  part 
  of 
  Maine 
  and 
  about 
  3,000 
  square 
  miles 
  

   in 
  Nova 
  Scotia 
  and 
  6,000 
  square 
  miles 
  in 
  New 
  Brunswick 
  ; 
  the 
  whole 
  

   of 
  New 
  Hampshire, 
  except 
  a 
  few 
  northern 
  towns 
  in 
  upper 
  Coos 
  county 
  ; 
  

   western 
  half 
  of 
  Vermont, 
  except 
  possibly 
  a 
  few 
  towns 
  in 
  Essex 
  and 
  

   Orleans 
  counties 
  on 
  the 
  northern 
  border 
  ; 
  nearly 
  all 
  Massachusetts, 
  

   except 
  a 
  part 
  of 
  Berkshire 
  county, 
  a 
  few 
  adjoining 
  towns 
  and 
  the 
  whole 
  

   of 
  Rhode 
  Island 
  ; 
  about 
  one-third 
  of 
  Connecticut, 
  including 
  Windham 
  

   and 
  Tolland 
  counties 
  and 
  a 
  portion 
  of 
  Hartford 
  and 
  New 
  London 
  

   counties 
  ; 
  and 
  this 
  winter, 
  nests 
  have 
  been 
  found 
  on 
  Fishers 
  Island 
  which 
  

   belongs 
  to 
  the 
  State 
  of 
  New^ 
  York. 
  Evidence 
  shows 
  that 
  the 
  pest 
  has 
  

   spread 
  more 
  rapidly 
  in 
  the 
  north 
  and 
  east 
  direction 
  than 
  in 
  the 
  south 
  

   and 
  west, 
  the 
  chief 
  reason 
  for 
  this 
  probably 
  being 
  the 
  prevailing 
  winds 
  

   jin 
  summer. 
  Further 
  details 
  are 
  given 
  of 
  the 
  spread 
  in 
  Connecticut 
  

   in 
  spite 
  of 
  all 
  efforts. 
  Food-plants 
  are 
  numerous, 
  Fernald 
  and 
  

  

  