﻿PROCEEDIiN'GS 
  OF 
  THE 
  FOrRTH 
  ENTOMOLOGICAL 
  MEETING 
  97 
  

  

  check 
  tlie 
  tall 
  growth, 
  and 
  to 
  stimulate 
  the 
  side 
  branches, 
  had 
  in 
  fact 
  no 
  

   appearance 
  and 
  attack 
  of 
  these 
  mites, 
  while 
  those 
  adjoining 
  rows 
  of 
  

   plants 
  whose 
  tops 
  were 
  not 
  pruned 
  had 
  a 
  severe 
  attack 
  of 
  mites. 
  

   Secondly, 
  those 
  which 
  received 
  irrigation 
  from 
  the 
  stream 
  were 
  al- 
  

   together 
  immune 
  in 
  comparison 
  with 
  the 
  unirrigated 
  plots 
  where 
  these 
  

   mites 
  were 
  very 
  abundant. 
  From 
  this 
  it 
  leads 
  us 
  to 
  believe 
  that 
  mois- 
  

   ture 
  in 
  soil 
  plays 
  a 
  very 
  important 
  part 
  in 
  controlling 
  this 
  pest. 
  

  

  Some 
  trials 
  of 
  spraying 
  the 
  crop 
  with 
  Lime 
  and 
  Sulphur 
  solution 
  were 
  

   also 
  made. 
  No 
  doubt 
  the 
  spray 
  had 
  an 
  effect 
  of 
  controlling 
  these 
  mites. 
  

   However 
  it 
  caused 
  the 
  shedding 
  of 
  leaves 
  due 
  to 
  the 
  caustic 
  effect 
  of 
  

   lime, 
  though 
  very 
  dilute 
  solutions 
  were 
  used, 
  but 
  later 
  on 
  the 
  sprayed 
  

   rows 
  grew 
  well 
  and 
  had 
  a 
  better 
  yield 
  of 
  the 
  crop 
  than 
  the 
  adjoining 
  

   unsprayed 
  ones. 
  

  

  The 
  dusting 
  of 
  Lime 
  and 
  Sulphur 
  as 
  well 
  as 
  spraying 
  the 
  crop 
  with 
  

   Incosopol 
  and 
  Sulphur 
  were 
  tried 
  but 
  it 
  did 
  not 
  seem 
  to 
  make 
  a 
  material 
  

   difference 
  with 
  the 
  control 
  plots. 
  

  

  Lastly 
  a 
  trial 
  of 
  steeping 
  the 
  seed 
  before 
  sowing 
  in 
  mercury 
  'per- 
  

   chloride 
  solution 
  was 
  made. 
  It 
  was 
  done 
  as 
  under 
  : 
  — 
  

  

  First, 
  good, 
  • 
  well-developed 
  and 
  plump 
  seeds 
  were 
  sorted 
  out 
  from 
  

   the 
  lot 
  of 
  seeds 
  supplied 
  for 
  the 
  experiment. 
  Thereafter, 
  the 
  fuzz 
  of 
  

   the 
  selected 
  lot 
  of 
  sorted 
  out 
  seeds 
  was 
  removed 
  by 
  rubbing 
  on 
  a 
  stony 
  

   floor. 
  For 
  preparing 
  the 
  solution, 
  a 
  weighed 
  quantity 
  of 
  mercury 
  per- 
  

   chloride 
  was 
  taken 
  in 
  the 
  proportion 
  of 
  1 
  in 
  500 
  parts 
  of 
  water. 
  First 
  

   the 
  corrosive 
  sublimate 
  was 
  dissolved 
  in 
  some 
  quantity 
  of 
  hot 
  water 
  

   and 
  then 
  diluted 
  to 
  the 
  required 
  strength 
  of 
  cold 
  water. 
  After 
  

   making 
  the 
  solution 
  ready 
  in 
  this 
  way 
  in 
  a 
  glass 
  jar, 
  as 
  much 
  quantity 
  

   of 
  cotton 
  seed 
  as 
  could 
  accommodate 
  easily 
  and 
  float 
  in 
  that 
  water 
  was 
  

   shoved 
  in 
  and 
  thoroughly 
  mixed 
  with 
  the 
  solution. 
  In 
  this 
  condition 
  

   the 
  seed 
  was 
  allowed 
  to 
  remain 
  for 
  ten 
  minutes. 
  Thereafter 
  it 
  was 
  

   taken 
  out 
  and 
  spread 
  under 
  shade 
  for 
  drying. 
  Before 
  sowing 
  the 
  seed 
  

   in 
  the 
  field, 
  germinating 
  tests 
  of 
  different 
  strengths 
  of 
  mercury 
  per- 
  

   chloride 
  solutions 
  were 
  made 
  in 
  the 
  laboratory. 
  After 
  having 
  ascertained 
  

   that 
  and 
  treating 
  the 
  seed 
  with 
  the 
  above 
  strength 
  of 
  solution, 
  the 
  plots 
  

   reserved 
  for 
  this 
  experiment 
  were 
  sown 
  with 
  them. 
  The 
  germination 
  

   of 
  the 
  seed 
  and 
  after-development 
  of 
  the 
  plant 
  were 
  very 
  excellent 
  in 
  

   comparison 
  with 
  the 
  control 
  and 
  other 
  plots 
  of 
  the 
  Farm 
  area. 
  

  

  When 
  the 
  crop 
  became 
  two 
  months 
  old. 
  Woolly 
  Mites 
  began 
  to 
  appear. 
  

   In 
  the 
  treated 
  plot, 
  the 
  percentage 
  of 
  disease 
  was 
  about 
  -4: 
  to 
  -5 
  per 
  cent, 
  

   while 
  in 
  the 
  untreated 
  plots 
  it 
  was 
  3 
  per 
  cent, 
  and 
  even 
  more. 
  

  

  The 
  removal 
  of 
  first 
  affected 
  leaves 
  was 
  also 
  tried, 
  which 
  was 
  very 
  

   helpful 
  in 
  checking 
  the 
  further 
  progress 
  of 
  the 
  pesb. 
  

  

  