﻿REPORT 
  OF 
  THE 
  STATE 
  ENTOMOLOGIST 
  I9OO 
  981 
  

  

  Experiments 
  with 
  a 
  whale 
  oil 
  soap 
  and 
  crude 
  petroleum 
  com- 
  

   bination 
  against 
  San 
  Jose 
  scale. 
  A 
  combination 
  of 
  these 
  two 
  in- 
  

   secticides 
  was 
  tried 
  on 
  15 
  trees. 
  The 
  whale 
  oil 
  soap 
  was 
  used 
  at 
  the 
  rate 
  

   of 
  I 
  pound 
  to 
  4 
  gallons 
  of 
  water, 
  and 
  this 
  solution 
  was 
  poured 
  into 
  the 
  

   barrel 
  of 
  the 
  kerowater 
  sprayer. 
  Crude 
  petroleum 
  was 
  put 
  in 
  the 
  oil 
  

   tank, 
  and 
  the 
  pump 
  set 
  to 
  deliver 
  10% 
  oil. 
  The 
  mixture 
  was 
  pretty 
  

   well 
  emulsified 
  in 
  passing 
  through 
  the 
  nozzles. 
  This 
  spraying 
  was 
  done 
  

   Ap. 
  20, 
  but 
  otherwise 
  the 
  conditions 
  were 
  the 
  same 
  as 
  in 
  the 
  preceding 
  

   experiments. 
  The 
  condition 
  of 
  the 
  trees 
  at 
  this 
  time 
  was 
  as 
  follows 
  : 
  

   Trees 
  62 
  and 
  6^, 
  early 
  pear 
  8 
  and 
  12 
  feet 
  high 
  respectively, 
  were 
  but 
  

   moderately 
  infested 
  with 
  the 
  San 
  Jose 
  scale. 
  Trees 
  64.-66, 
  Bardett 
  

   pear 
  14 
  feet 
  high, 
  were 
  respectively, 
  badly, 
  moderately 
  and 
  very 
  badly 
  

   infested 
  with 
  the 
  scale. 
  Tree 
  67, 
  a 
  Howell 
  pear 
  12 
  feet 
  high, 
  was 
  very 
  

   badly 
  infested, 
  and 
  tree 
  6S, 
  a 
  Vermont 
  beauty 
  pear 
  10 
  feet 
  high, 
  was 
  

   quite 
  badly 
  infested. 
  Trees 
  75-77, 
  the 
  first 
  a 
  Crawford 
  andthe 
  others 
  

   globe 
  peach, 
  respectively 
  10, 
  9 
  and 
  14 
  feet 
  high, 
  were 
  infested 
  with 
  but 
  few 
  

   scales, 
  except 
  tree 
  77, 
  which 
  was 
  moderately 
  infested. 
  Tree 
  96, 
  a 
  beurre 
  

   d'Anjou 
  pear 
  9 
  feet 
  high, 
  was 
  infested 
  with 
  but 
  few 
  scales. 
  Trees 
  97- 
  

   100, 
  seckel 
  pear 
  10 
  feet 
  high, 
  were 
  all 
  badly 
  infested, 
  except 
  99, 
  which 
  

   was 
  but 
  moderately 
  infested. 
  

  

  May 
  II. 
  Tree 
  67 
  appears 
  dead, 
  probably 
  from 
  the 
  effects 
  of 
  the 
  scale, 
  

   as 
  it 
  was 
  very 
  badly 
  infested 
  in 
  the 
  early 
  spring. 
  Tree 
  68. 
  The 
  leaves 
  

   are 
  nearly 
  out 
  and 
  there 
  are 
  many 
  blossom 
  buds 
  opening. 
  

  

  May 
  14. 
  Tree 
  62. 
  The 
  leaves 
  are 
  vigorous, 
  nearly 
  out 
  and 
  there 
  are 
  

   a 
  few 
  blossoms. 
  Tree 
  6^. 
  The 
  foliage 
  is 
  appearing 
  more 
  irregularly 
  than 
  

   in 
  the 
  preceding, 
  some 
  leaves 
  are 
  nearly 
  out 
  and 
  others 
  just 
  starting. 
  The 
  

   leaves 
  are 
  pretty 
  well 
  out 
  on 
  trees 
  64 
  and 
  65, 
  and 
  the 
  numerous 
  blossoms 
  

   are 
  open. 
  The 
  leaves 
  on 
  tree 
  66 
  are 
  scattering, 
  partly 
  out 
  and 
  there 
  are 
  but 
  

   few 
  blossoms. 
  The 
  tree 
  is 
  very 
  badly 
  infested. 
  Tree 
  67 
  has 
  died, 
  undoubt- 
  

   edly 
  in 
  consequence 
  of 
  severe 
  injury 
  by 
  the 
  scale. 
  The 
  leaves 
  on 
  tree 
  

   68 
  are 
  pretty 
  well 
  out, 
  though 
  rather 
  scattering, 
  and 
  the 
  abundant 
  blos- 
  

   soms 
  are 
  open. 
  The 
  presence 
  of 
  large 
  numbers 
  of 
  the 
  scale 
  accounts 
  for 
  

   the 
  unsatisfactory 
  condition 
  of 
  the 
  tree. 
  The 
  leaves 
  and 
  buds 
  are 
  just 
  

   starting 
  on 
  tree 
  75. 
  The 
  leaves 
  are 
  unfolding 
  and 
  the 
  blossoms 
  are 
  well 
  

   out 
  on 
  tree 
  76 
  (pi. 
  12). 
  The 
  leaves 
  are 
  pretty 
  well 
  started 
  and 
  the 
  

   blossom 
  buds 
  are 
  rather 
  few 
  on 
  tree 
  77. 
  The 
  leaves 
  on 
  trees 
  96-100 
  are 
  

   pretty 
  well 
  out, 
  though 
  rather 
  scarce 
  on 
  tree 
  96. 
  There 
  are 
  few 
  blos- 
  

   soms 
  on 
  tree 
  97 
  and 
  many 
  on 
  trees 
  98-100. 
  PI. 
  12 
  also 
  shows 
  the 
  

   condition 
  of 
  tree 
  98. 
  

  

  