﻿Commissioner 
  of 
  Agkicultuee. 
  579 
  

  

  In 
  the 
  case 
  of 
  20^ 
  of 
  oil, 
  the 
  bunch 
  numbered 
  eleven, 
  and 
  the 
  

   results 
  were 
  as 
  follows 
  : 
  Killed, 
  8 
  ; 
  badly 
  injured, 
  2 
  ; 
  escaped, 
  1. 
  

  

  In 
  the 
  case 
  of 
  the 
  15^ 
  oil, 
  the 
  bunch 
  sprayed 
  was 
  twenty- 
  

   six 
  in 
  number, 
  and 
  the 
  results 
  were 
  as 
  follows:- 
  Killed, 
  14; 
  es- 
  

   caped, 
  12, 
  many 
  of 
  which 
  were 
  badly 
  injured. 
  

  

  In 
  these 
  trials 
  the 
  length 
  of 
  time 
  allowed 
  for 
  the 
  oil 
  to 
  act 
  was 
  

   three 
  minutes. 
  The 
  above 
  trials 
  were 
  repeated 
  in 
  numerous 
  

   cases 
  with 
  the 
  results 
  running 
  in 
  about 
  the 
  same 
  percentages 
  of 
  

   killed 
  and 
  badly 
  injured 
  caterpillars. 
  Lower 
  percentages 
  of 
  oil 
  

   were 
  also 
  used, 
  but 
  the 
  results 
  were 
  so 
  unsatisfactorv 
  that 
  no 
  

   records 
  of 
  them 
  were 
  kept. 
  

  

  These 
  oil 
  experiments 
  were 
  conducted 
  on 
  the 
  caterpillars 
  on 
  

   the 
  fences, 
  etc., 
  where 
  they 
  were 
  crawling 
  about 
  in 
  search 
  of 
  a 
  

   place 
  to 
  pupate 
  and 
  on 
  the 
  bunches 
  which 
  had 
  collected 
  on 
  the 
  

   trunks 
  of 
  trees. 
  In 
  the 
  cases 
  where 
  the 
  trunks 
  of 
  trees 
  are 
  sprayed 
  

   it 
  was 
  found 
  dangerous 
  to 
  use 
  more 
  than 
  a 
  20^ 
  solution 
  of 
  the 
  

   oil, 
  as 
  a 
  larger 
  proportion 
  would 
  seriously 
  affect 
  the 
  trees. 
  

  

  Many 
  of 
  the 
  caterpillars 
  which 
  are 
  recorded 
  as 
  escaping 
  were 
  

   collected 
  and 
  caged, 
  and 
  it 
  was 
  found 
  later 
  that 
  they 
  could 
  not 
  sur- 
  

   vive 
  to 
  pupate, 
  but 
  died 
  without 
  transforming. 
  The 
  use 
  of 
  the 
  

   oil 
  will 
  be 
  found 
  highly 
  beneficial 
  to 
  use 
  after 
  the 
  caterpillars 
  

   have 
  reached 
  the 
  pupating 
  stage, 
  to 
  prevent 
  the 
  maturing 
  of 
  the 
  

   moth 
  and 
  a 
  consequent 
  large 
  crop 
  for 
  the 
  succeeding 
  year. 
  

  

  This 
  winter 
  and 
  next 
  spring 
  it 
  is 
  the 
  intention 
  to 
  experiment 
  

   with 
  oil 
  on 
  the 
  egg 
  masses 
  and 
  also 
  vnih 
  poison 
  on 
  the 
  young 
  cater- 
  

   pillars 
  to 
  find 
  means 
  of 
  better 
  controlling 
  them 
  than 
  this 
  report 
  

  

  can 
  recommend. 
  

  

  Very 
  truly 
  yours, 
  

  

  CHESTER 
  YOUNG, 
  

  

  Nursery 
  Inspector, 
  

  

  