﻿PROCEEDINGS 
  OF 
  THE 
  FOURTH 
  ENTOMOLOGICAL 
  MEETING 
  

  

  139 
  

  

  In 
  the 
  following 
  two 
  years 
  at 
  the 
  same 
  station 
  the 
  examination' 
  of 
  

   immunity 
  was 
  continued 
  and 
  it 
  was 
  found 
  out 
  that 
  the 
  superiority 
  of 
  

   Khari 
  and 
  Sannabille 
  in 
  tillering, 
  placed 
  them 
  at 
  an 
  advantage 
  over 
  

   other 
  varieties, 
  though 
  the 
  difference 
  in 
  the 
  degree 
  of 
  affection 
  was 
  

   not 
  very 
  marked. 
  Again 
  during 
  the 
  years 
  1912-13 
  and 
  1913-14 
  at 
  

   Telinkheri 
  station 
  an 
  experiment 
  was 
  started 
  to 
  find 
  oit 
  the 
  percentage 
  

   of 
  cane 
  affected 
  by 
  stem-borer, 
  and 
  the 
  average 
  number 
  of 
  canes 
  per 
  

   stool, 
  which 
  again 
  showed 
  that 
  Khari 
  and 
  Sannabille 
  are 
  superior 
  to 
  

   the 
  rest. 
  

  

  Although 
  the 
  percentages 
  of 
  attacked 
  canes 
  in 
  the 
  first 
  two 
  cases 
  

   are 
  not 
  recorded, 
  yet 
  the 
  experience 
  is 
  that 
  these 
  thin 
  varieties 
  are 
  

   less 
  susceptible 
  to 
  stem-borer. 
  

  

  The 
  time 
  of 
  the 
  planting 
  of 
  canes 
  is 
  another 
  factor 
  which 
  plays 
  an 
  

   important 
  part 
  in 
  altering 
  the 
  extent 
  of 
  attack 
  by 
  stem-borer. 
  Both 
  

   thin 
  and 
  thick 
  varieties 
  of 
  canes 
  were 
  studied 
  in 
  respect 
  of 
  this. 
  The 
  

   results 
  of 
  the 
  experim.ents 
  would 
  appear 
  to 
  indicate 
  that 
  cane 
  planted 
  

   in 
  October 
  gives 
  a 
  much 
  larger 
  yield 
  than 
  that 
  planted 
  in 
  February 
  

   and 
  March. 
  When 
  planted 
  in 
  October, 
  it 
  gets 
  a 
  good 
  start 
  before 
  the 
  

   hot 
  weather 
  sets 
  in 
  and 
  the 
  moths 
  of 
  the 
  borers 
  regain 
  their 
  normal 
  

   activity 
  after 
  a 
  spell 
  of 
  cold 
  weather. 
  Borer 
  does 
  all 
  its 
  damage 
  between 
  

   February 
  and 
  June, 
  but 
  it 
  does 
  not 
  attack 
  cane 
  appreciably 
  when 
  it 
  is 
  

   four 
  to 
  five 
  feet 
  high 
  in 
  February. 
  As 
  by 
  early 
  planting 
  the 
  damage 
  

   appears 
  to 
  be 
  reduced, 
  the 
  gain 
  will 
  be 
  very 
  great. 
  

  

  