﻿578 
  Seventh 
  Annual 
  Report 
  of 
  the 
  

  

  Boil 
  this 
  for 
  fifteen 
  minutes 
  and 
  then 
  take 
  for 
  spraying 
  ai 
  

   follows 
  : 
  

  

  Water 
  50 
  gallons. 
  

  

  Arsenic 
  solution 
  1 
  quart. 
  

  

  Lime 
  3 
  pounds. 
  

  

  In 
  place 
  of 
  the 
  lime 
  also 
  was 
  used 
  sugar 
  of 
  lead 
  in 
  the 
  folloW' 
  

   ing 
  proportions 
  : 
  

  

  Water 
  50 
  gallons. 
  

  

  Sugar 
  of 
  lead 
  12 
  ounces. 
  

  

  Lime 
  6 
  " 
  

  

  Arsenic 
  solution 
  1 
  quart 
  

  

  In 
  ease 
  of 
  all 
  these 
  poisons 
  except 
  that 
  of 
  the 
  London 
  purple, 
  

   whenever 
  the 
  caterpillars 
  could 
  be 
  induced 
  to 
  eat 
  it 
  they 
  were 
  

   killed, 
  even 
  though 
  thev 
  had 
  reached 
  an 
  adult 
  condition. 
  The 
  best 
  

   results 
  were 
  obtained 
  from 
  the 
  use 
  of 
  the 
  arsenites 
  of 
  lime 
  and 
  

   lead. 
  Probably 
  the 
  lead 
  will 
  give 
  the 
  best 
  results, 
  but 
  as 
  it 
  is 
  an 
  

   accumulative 
  poison 
  the 
  use 
  of 
  the 
  lime 
  arsenite 
  is 
  more 
  strongly 
  

   recommended. 
  There 
  is 
  no 
  doubt 
  but 
  that 
  the 
  use 
  of 
  these 
  poisons 
  

   when 
  the 
  caterpillars 
  are 
  feeding 
  regularly 
  will 
  greatly 
  check 
  the 
  

   work 
  of 
  destruction. 
  It 
  is 
  to 
  be 
  recommended, 
  however, 
  that 
  the 
  

   spraying 
  be 
  begun 
  early 
  while 
  the 
  caterpillars 
  are 
  still 
  small 
  and 
  

   then 
  less 
  doses 
  of 
  the 
  insecticides 
  will 
  do 
  the 
  work 
  of 
  larger 
  doses 
  

   applied 
  at 
  a 
  later 
  period. 
  

  

  Experiments 
  were 
  also 
  made 
  with 
  a 
  Doming 
  kerosene 
  pump 
  in 
  

   the 
  following 
  proportions 
  of 
  kerosene: 
  50^, 
  25^, 
  20^, 
  15^, 
  10j< 
  

   and 
  5^, 
  with 
  the 
  following 
  results 
  : 
  

  

  In 
  the 
  case 
  of 
  50^^ 
  oil 
  all 
  the 
  caterpillars 
  touched 
  were 
  killed 
  

   and 
  did 
  not 
  recover 
  in 
  the 
  least. 
  

  

  In 
  the 
  case 
  of 
  the 
  25^ 
  oil, 
  twenty-five 
  caterpillars 
  were 
  in 
  

   the 
  bunch 
  sprayed 
  and 
  the 
  following 
  results 
  were 
  obtained 
  : 
  Killed, 
  

   17 
  ; 
  escaped 
  injury, 
  6 
  ; 
  badly 
  injured, 
  2. 
  One 
  of 
  these 
  as 
  recorded 
  

   as 
  badly 
  injured 
  died 
  later. 
  

  

  