﻿469 
  

  

  at 
  Thorndale, 
  May 
  26th, 
  the 
  bugs 
  had 
  been 
  pairing 
  for 
  a 
  few 
  days. 
  

   Several 
  copulating 
  pairs 
  were 
  put 
  on 
  oats 
  growing 
  under 
  glass 
  

   chimneys 
  ; 
  the 
  first 
  eggs 
  were 
  deposited 
  May 
  28th 
  and 
  hatched 
  

   June 
  18th 
  ; 
  the 
  average 
  egg-production 
  per 
  female 
  was 
  95 
  ; 
  the 
  

   period 
  of 
  oviposition 
  was 
  18 
  or 
  19 
  days, 
  but 
  under 
  field 
  conditions 
  

   this 
  period 
  for 
  the 
  whole 
  brood 
  occupied 
  6 
  weeks. 
  The 
  females 
  

   apparently 
  required 
  repeated 
  fertilisation, 
  individual 
  pairs 
  having 
  been 
  

   obsei*ved 
  to 
  be 
  copulating 
  on 
  four 
  occasions. 
  On 
  cold 
  days 
  the 
  bugs 
  

   concentrate 
  at 
  the 
  base 
  of 
  the 
  plants, 
  but 
  when 
  the 
  sun 
  shines 
  they 
  

   move 
  in 
  all 
  directions 
  over 
  the 
  field, 
  especially 
  seeking 
  the 
  higher 
  or 
  

   drier 
  parts 
  : 
  hence 
  a 
  poor-conditioned 
  field 
  is 
  more 
  liable 
  to 
  serious 
  

   injury 
  than 
  one 
  where 
  the 
  crop 
  is 
  in 
  good 
  heart 
  and 
  forms 
  a 
  dense 
  

   shade, 
  and 
  should 
  the 
  grass 
  remain 
  succulent 
  throughout 
  the 
  summer, 
  

   the 
  bugs 
  are 
  not 
  likely 
  to 
  migrate 
  in 
  search 
  of 
  food. 
  The 
  infected 
  

   area 
  covers 
  about 
  5 
  square 
  miles 
  in 
  Middlesex 
  Count}-, 
  the 
  greatest 
  

   injury 
  being 
  in 
  the 
  centre. 
  Grass-farms 
  are 
  most 
  injured, 
  but 
  where 
  

   a 
  regular 
  system 
  of 
  rotation 
  is 
  followed 
  and 
  the 
  land 
  is 
  ploughed 
  every 
  

   3 
  or 
  4 
  years, 
  chinch-bugs 
  are 
  scarce, 
  except 
  in 
  woodland 
  pasture 
  left 
  

   unploughed. 
  Open 
  winters 
  and 
  wet 
  summers 
  are 
  unfavourable 
  to 
  

   this 
  pest, 
  but 
  a 
  succession 
  of 
  dry 
  summers, 
  especially 
  during 
  the 
  

   breeding 
  and 
  hatching 
  season, 
  would 
  be 
  likely 
  to 
  induce 
  an 
  outbreak. 
  

   Wet 
  weather 
  favours 
  Sporotriclium 
  ghbuh'fenim, 
  which 
  destroys 
  about 
  

   25 
  per 
  cent, 
  of 
  the 
  insects. 
  A 
  new 
  remedy 
  suggested 
  is 
  a 
  dusty 
  furrow, 
  

   for 
  dry 
  hot 
  w^eather. 
  A 
  strip 
  of 
  land 
  6-8 
  feet 
  long 
  should 
  be 
  deeply 
  

   ploughed 
  next 
  to 
  the 
  infested 
  field, 
  the 
  ground 
  being 
  thoroughly 
  

   pulverised. 
  A 
  weighted 
  log 
  6 
  to 
  8 
  feet 
  long, 
  sharpened 
  at 
  one 
  end, 
  

   should 
  be 
  drawn 
  lengthwise, 
  backwards 
  and 
  forwards 
  until 
  a 
  deep 
  

   furrow 
  has 
  been 
  made 
  across 
  the 
  line 
  of 
  the 
  chinch-bugs' 
  path. 
  The 
  

   dusty 
  sides 
  will 
  prove 
  impassable 
  to 
  them 
  and 
  the 
  heat 
  of 
  the 
  sun 
  will 
  

   kill 
  the 
  majority. 
  If 
  there 
  is 
  rain, 
  holes 
  about 
  12 
  inches 
  square, 
  and 
  

   the 
  same 
  depth 
  should 
  be 
  dug 
  in 
  the 
  bottom 
  of 
  the 
  furrow, 
  and 
  asphalt 
  

   road 
  oil, 
  No. 
  7, 
  should 
  be 
  poured 
  along 
  it. 
  The 
  quail 
  appears 
  to 
  be 
  

   the 
  only 
  bird 
  which 
  feeds 
  upon 
  this 
  bug 
  to 
  any 
  extent. 
  

  

  SopoTZKo 
  (A.). 
  OnbiTij 
  6opb6bi 
  ci* 
  osMMbiM-b 
  HepeeM-b 
  npn 
  noMoiUM 
  

   noBnki 
  GaSoMeKi) 
  Ha 
  naroKy 
  B-b 
  KpecTbflHCKMX-b 
  xosflMCToax-b 
  

   BoropOflMUKaro 
  ytSfla. 
  [An 
  experiment 
  in 
  fighting 
  the 
  larva 
  of 
  

   Euxoa 
  segetum 
  by 
  catching 
  the 
  moths 
  on 
  molasses 
  in 
  the 
  peasant 
  

   holdings 
  of 
  the 
  district 
  of 
  Bogoroditzk 
  (Govt, 
  of 
  Tula).]^ 
  

   Published 
  by 
  the 
  Entomological 
  Station 
  of 
  the 
  Zemstvo 
  of 
  the 
  

   Govt, 
  of 
  Tuh. 
  Tula, 
  1914, 
  15 
  pp., 
  1 
  fig. 
  

  

  The 
  author 
  refers 
  to 
  the 
  good 
  results 
  obtained 
  by 
  the 
  use 
  of 
  this 
  

   method 
  on 
  some 
  large 
  private 
  estates 
  in 
  South 
  Russia, 
  where 
  it 
  had 
  

   been 
  recommended 
  by 
  the 
  Entomological 
  Station 
  of 
  Kiev, 
  and 
  to 
  the 
  

   difficulty 
  of 
  inducing 
  the 
  peasant 
  population 
  to 
  apply 
  such 
  other 
  

   remedies 
  as 
  rotation 
  of 
  crops, 
  the 
  early 
  ploughing 
  of 
  fallow 
  fields, 
  

   occupied 
  fallow 
  land 
  (see 
  this 
  Review, 
  Ser. 
  A, 
  ii, 
  p. 
  340) 
  and 
  the 
  sup- 
  

   pression 
  of 
  weeds. 
  The 
  Station 
  of 
  Tula, 
  therefore, 
  decided 
  to 
  make 
  

   an 
  experiment 
  in 
  1913 
  with 
  this 
  remedy. 
  According 
  to 
  the 
  time 
  of 
  

   the 
  appearance 
  of 
  the 
  first 
  generation 
  of 
  E. 
  segetum 
  in 
  the 
  government 
  

   of 
  Tula, 
  the 
  troughs 
  had 
  to 
  be 
  put 
  out 
  about 
  the 
  2nd 
  June 
  and 
  not 
  

   removed 
  from 
  the 
  fields 
  before 
  the 
  14th 
  July. 
  The 
  troughs 
  were 
  placed 
  

  

  