﻿24 
  PROCEEDINGS 
  OF 
  THE 
  FOURTH 
  ENTOMOLOGICAL 
  MEETING 
  

  

  Xylebonis 
  biporus 
  appears 
  to 
  attack 
  healthy 
  trees, 
  but 
  I 
  have 
  not 
  

   had 
  time 
  to 
  visit 
  the 
  estate 
  to 
  confirm 
  this. 
  

  

  P. 
  198. 
  Apion 
  sp. 
  On 
  jute 
  and 
  Cajanus. 
  

  

  It 
  might 
  interest 
  you 
  to 
  know 
  that 
  there 
  was 
  in 
  Central 
  Africa 
  an 
  

   Apion 
  armipes 
  which 
  attacked 
  cotton 
  in 
  the 
  same 
  way 
  as 
  Pempheres 
  

   afpnis 
  does 
  in 
  this 
  country. 
  

  

  P. 
  202. 
  Pempheres 
  ajjinis. 
  Work 
  now 
  being 
  done 
  at 
  Coimbatore. 
  

   Distribution 
  seems 
  fairly 
  even 
  in 
  cotton-growing 
  tracts, 
  but 
  I 
  did 
  not 
  

   see 
  it 
  at 
  Anaka]'>alle. 
  It 
  was 
  found 
  in 
  stems 
  from 
  Bellary 
  district, 
  but 
  

   the 
  characteristic 
  swellings 
  were 
  not 
  to 
  be 
  seen. 
  This 
  may 
  account 
  

   for 
  its 
  being 
  overlooked; 
  Also 
  the 
  fact 
  that 
  it 
  attacks 
  below 
  the 
  ground 
  

   in 
  country 
  cottons. 
  It 
  breeds 
  freely 
  in 
  CorcJiorus 
  oliforius 
  (not 
  a 
  mal- 
  

   vaceous 
  plant, 
  but 
  belonging 
  to 
  the 
  next 
  family, 
  Tiliacese), 
  in 
  two 
  species 
  

   of 
  Ahutilon, 
  in 
  Hibiscus 
  rosasinensis 
  and 
  H. 
  esculentus 
  (Bhindi), 
  Gogu 
  

   or 
  Deccan 
  hemp, 
  and, 
  when 
  all 
  cotton 
  was 
  off 
  the 
  ground, 
  was 
  found 
  

   on 
  Ficus 
  religiosa 
  in 
  the 
  Botanical 
  gardens 
  at 
  Goimbatore. 
  It 
  was 
  

   not 
  bred 
  from 
  this 
  tree 
  but 
  couples 
  were 
  copulating 
  freely 
  on 
  the 
  tree. 
  

   Attempts 
  are 
  being 
  made 
  to 
  ascertain 
  whether 
  a 
  resistant 
  strain 
  of 
  

   cotton 
  can 
  be 
  grown. 
  We 
  are 
  going 
  into 
  the 
  lifehistory 
  of 
  this 
  insect 
  

   very 
  thoroughly 
  but 
  I 
  do 
  not 
  wish 
  to 
  say 
  much 
  about 
  it 
  at 
  present. 
  

   A 
  parasitic 
  grub 
  has 
  been 
  found 
  on 
  the 
  larva 
  of 
  Pempheres 
  afjinis 
  but 
  

   could 
  not 
  be 
  reared. 
  Specimens 
  of 
  Pempheres 
  have 
  been 
  found 
  killed 
  

   by 
  a 
  fungus. 
  It 
  attacks 
  both 
  larva 
  and 
  adult. 
  With 
  reference 
  to 
  

   remarks 
  made 
  at 
  the 
  last 
  Conference 
  and 
  about 
  pulling 
  out 
  all 
  first- 
  

   attacked 
  plants, 
  I 
  wish 
  to 
  say 
  that 
  although 
  all 
  Coimbatore 
  district 
  

   pulled 
  up 
  its 
  cotton 
  by 
  the 
  end 
  of 
  August 
  1919 
  and 
  1920, 
  there 
  has 
  

   so 
  far 
  been 
  no 
  appreciable 
  result 
  as 
  regards 
  Pempheres 
  attack 
  ; 
  75 
  to 
  

   100 
  per 
  cent, 
  of 
  the 
  plants 
  are 
  attacked 
  by 
  the 
  end 
  of 
  the 
  season, 
  and 
  

   there 
  is 
  no 
  evidence 
  to 
  show 
  that 
  the 
  continuous 
  pulling 
  up 
  of 
  the 
  plants 
  

   on 
  the 
  Farm 
  has 
  had 
  any 
  effect 
  in 
  lessening 
  the 
  attack 
  of 
  the 
  Pest. 
  

   Cotton 
  grown 
  for 
  the 
  first 
  time 
  in 
  the 
  Wet 
  Lands 
  800 
  to 
  1,000 
  yards 
  

   from 
  the 
  nearest 
  cotton 
  was 
  attacked 
  quite 
  heavily 
  in 
  1919. 
  Two 
  or 
  

   three 
  years 
  of 
  the 
  Pest 
  Act 
  might 
  possibly 
  have 
  some 
  effect. 
  Country 
  

   cottons 
  are 
  more 
  resistant 
  than 
  Cambodia 
  and 
  Bourbon. 
  Cambodia- 
  

   Bourbon 
  cross 
  appears 
  to 
  be 
  more 
  resistant 
  than 
  Cambodia 
  but, 
  as 
  

   all 
  our 
  investigations 
  are 
  in 
  their 
  infancy, 
  I 
  do 
  not 
  wish 
  to 
  say 
  more, 
  

   as 
  too 
  many 
  statements 
  have 
  been 
  made 
  about 
  Pempheres 
  and 
  other 
  

   insect 
  pests 
  on 
  insufficient 
  data. 
  Nothing 
  is 
  known 
  as 
  to 
  the 
  effect 
  

   on 
  the 
  plant. 
  As 
  a 
  general 
  rule 
  only 
  seedlings 
  and 
  young 
  plants 
  are 
  

   killed 
  by 
  the 
  Pempheres 
  attack. 
  It 
  is 
  rare 
  to 
  find 
  full-grown 
  plants 
  

   killed 
  although 
  there 
  may 
  be 
  multiple 
  infestation. 
  I 
  am 
  not 
  convinced 
  

   that 
  Pempheres 
  is 
  as 
  serious 
  a 
  pest 
  as 
  is 
  made 
  out. 
  

  

  