﻿140 
  

  

  PROCEEDINGS 
  OF 
  THE 
  FOURTH 
  ENTOMOLOGICAL 
  MEETING 
  

  

  The 
  result 
  of 
  planting 
  at 
  different 
  dates 
  is 
  tabulated 
  below 
  both 
  

   for 
  thick 
  and 
  thin 
  canes. 
  

  

  The 
  general 
  belief 
  which 
  has 
  long 
  gained 
  ground 
  in 
  the 
  minds 
  of 
  

   cultivators 
  that 
  borers 
  do 
  considerable 
  damage 
  to 
  thick 
  canes 
  during 
  

   the 
  hot 
  weather 
  is 
  thus 
  supported 
  by 
  the 
  results 
  of 
  the 
  experiments. 
  

  

  The 
  experiments 
  conducted 
  in 
  the 
  past 
  years 
  were 
  devised 
  simply 
  

   to 
  ascertain 
  the 
  damage 
  caused 
  by 
  borer 
  without 
  paying 
  any 
  special 
  

   attention 
  to 
  find 
  out 
  the 
  species 
  of 
  borers. 
  Moth 
  borer 
  {Chilo 
  simplex) 
  

   was 
  considered 
  to 
  be 
  the 
  chief 
  borer 
  and 
  references 
  to 
  it 
  are 
  often 
  found 
  

   in 
  several 
  inquiries 
  and 
  reports 
  of 
  cane 
  cultivation 
  . 
  Later 
  on 
  the 
  

   specimens, 
  determined 
  as 
  Chilo, 
  were 
  overhauled 
  and 
  were 
  found 
  to 
  

   have 
  comprised 
  other 
  genera 
  and 
  species 
  associated 
  with 
  Chilo 
  si^nplex. 
  

   In 
  the 
  Central 
  Provinces 
  till 
  very 
  recently 
  three 
  species 
  of 
  borers 
  were 
  

   known, 
  viz., 
  Chilo 
  simplex, 
  a 
  species 
  of 
  Sesamia- 
  and 
  Scirpophaga 
  

   xanthogastrella 
  {aurijiua). 
  But, 
  consequent 
  on 
  the 
  more 
  definite 
  

   determination 
  of 
  the 
  species 
  of 
  borers, 
  it 
  was 
  found 
  necessary 
  to 
  con- 
  

   duct 
  a 
  survey 
  of 
  cane-borers 
  in 
  order 
  to 
  ascertain 
  the 
  species 
  involved, 
  

   their 
  probable 
  distribution 
  in 
  different 
  cane-growing 
  tracts 
  and 
  their 
  

   liking 
  for 
  any 
  particular 
  varieties 
  of 
  canes 
  if 
  there 
  be 
  any. 
  With 
  the 
  

   above 
  object 
  in 
  view 
  an 
  inquiry 
  was 
  conducted 
  in 
  the 
  years 
  1919-20. 
  

   During 
  the 
  inquiry 
  the 
  following 
  varieties 
  of 
  canes 
  were 
  seen 
  largely 
  

   growing 
  both 
  at 
  the 
  experimental 
  and 
  the 
  demonstration 
  station 
  : 
  — 
  

  

  Ked 
  Mauritius, 
  Ashy 
  Mauritius, 
  Striped 
  Mauritius, 
  Pachmng, 
  

   Khari, 
  Java 
  247, 
  Sannabille, 
  Dhmvari 
  (thick 
  cane) 
  Bungle 
  (Thin 
  

   white 
  cane) 
  Pounda, 
  Yuba, 
  Pundia. 
  

  

  I 
  gathered 
  information 
  regarding 
  the 
  time 
  of 
  planting 
  sugarcane, 
  

   percentage 
  of 
  damage 
  caused 
  by 
  borers 
  and 
  varieties 
  of 
  canes 
  planted 
  

   from 
  about 
  forty 
  different 
  places 
  in 
  this 
  Province. 
  The 
  time 
  of 
  planting 
  

   ranges 
  from 
  November 
  till 
  March 
  and 
  percentage 
  of 
  affectation 
  by 
  borer 
  

  

  