﻿REPORT 
  OF 
  THE 
  STATE 
  ENTOMOLOGIST 
  I9OO 
  97 
  1 
  

  

  May 
  28. 
  The 
  leaves 
  on 
  tree 
  23 
  are 
  still 
  thin, 
  but 
  the 
  weakness 
  is 
  

   doubtless 
  due 
  in 
  considerable 
  part 
  to 
  the 
  large 
  number 
  of 
  scale 
  insects 
  on 
  

   the 
  tree. 
  

  

  June 
  20. 
  Living 
  scales 
  were 
  found 
  on 
  several 
  of 
  these 
  trees, 
  

  

  July 
  2. 
  Young 
  scales 
  are 
  rather 
  abundant 
  on 
  tree 
  23, 
  there 
  are 
  appar- 
  

   ently 
  none 
  on 
  tree 
  24. 
  Few 
  young 
  scales 
  are 
  found 
  on 
  trees 
  36 
  and 
  37. 
  

  

  July 
  16. 
  The 
  presence 
  of 
  living 
  young 
  on 
  these 
  trees 
  shows 
  that 
  25 
  % 
  

   kerosene 
  emulsion 
  will 
  not 
  kill 
  all 
  the 
  scales 
  on 
  dormant 
  trees. 
  This 
  led 
  

   to 
  their 
  being 
  sprayed 
  with 
  a 
  10 
  % 
  mechanical 
  emulsion 
  under 
  the 
  same 
  

   conditions 
  as 
  those 
  treated 
  with 
  the 
  20 
  % 
  emulsion 
  (see 
  under 
  the 
  latter 
  

   head). 
  

  

  July 
  19. 
  The 
  foliage 
  was 
  uninjured, 
  and 
  no 
  living 
  young 
  scales 
  were 
  

   found. 
  

  

  July 
  30. 
  Practically 
  the 
  same 
  conditions 
  obtained 
  as 
  on 
  the 
  19th. 
  

  

  Aug. 
  3. 
  There 
  were 
  comparatively 
  few 
  young 
  on 
  tree 
  23, 
  and 
  on 
  tree 
  

   24 
  none 
  were 
  found. 
  Some 
  young 
  scales 
  were 
  found 
  on 
  trees 
  ^6 
  and 
  37, 
  

  

  Sep. 
  7. 
  Young 
  scales 
  are 
  abundant 
  on 
  tree 
  23, 
  the 
  leaves 
  of 
  which 
  are 
  

   partly 
  curled. 
  The 
  tree 
  looks 
  pretty 
  hard. 
  There 
  are 
  very 
  few 
  or 
  no 
  

   young 
  on 
  tree 
  24, 
  which 
  is 
  green 
  and 
  vigorous. 
  Young 
  scales 
  are 
  rather 
  

   abundant 
  on 
  tree 
  ^6 
  and 
  very 
  abundant 
  on 
  tree 
  37. 
  

  

  Oct. 
  25, 
  There 
  has 
  been 
  no 
  material 
  change 
  except 
  that 
  the 
  scale 
  is 
  

   more 
  abundant. 
  Tree 
  23 
  is 
  in 
  a 
  very 
  bad 
  condition. 
  

  

  Experiments 
  with 
  tmdiluted 
  kerosene. 
  It 
  appeared 
  very 
  risky 
  to 
  spray 
  

   wiih 
  this 
  substance; 
  consequently 
  the 
  number 
  of 
  trees 
  treated 
  was 
  limited 
  

   to 
  three. 
  Their 
  condition 
  at 
  the 
  beginning 
  of 
  the 
  experiments, 
  Ap, 
  11, 
  

   was 
  as 
  follows. 
  Tree 
  20 
  was 
  a 
  very 
  badly 
  infested 
  Bartlett 
  pear 
  8 
  feet 
  

   high. 
  Tree 
  21 
  was 
  a 
  very 
  badly 
  infested 
  Howell 
  pear 
  9 
  feet 
  high. 
  Tree 
  

   107 
  was 
  another 
  badly 
  infested 
  Bartlett 
  pear 
  8 
  feet 
  high. 
  

  

  Ap. 
  19. 
  The 
  kerosene 
  is 
  somewhat 
  evident 
  on 
  trees 
  20, 
  21 
  and 
  

   hardly 
  so 
  on 
  tree 
  107. 
  

  

  May 
  II. 
  Tree 
  20 
  is 
  in 
  a 
  very 
  bad 
  state, 
  but 
  possibly 
  this 
  is 
  due 
  as 
  much 
  

   to 
  the 
  abundance 
  of 
  the 
  scale, 
  which 
  almost 
  covers 
  the 
  tree, 
  as 
  to 
  the 
  

   treatment 
  given. 
  The 
  tips 
  of 
  several 
  limbs 
  show 
  a 
  few 
  leaves 
  starting. 
  

   Many 
  suckers 
  have 
  been 
  thrown 
  out 
  at 
  the 
  base 
  of 
  the 
  tree, 
  and 
  on 
  these 
  

   the 
  leaves 
  are 
  farther 
  out. 
  Tree 
  21 
  is 
  in 
  almost 
  the 
  same 
  condition. 
  It 
  

   is 
  nearly 
  covered 
  with 
  the 
  scale 
  and 
  looks 
  very 
  bad. 
  The 
  leaves 
  are 
  be- 
  

   ginning 
  to 
  appear 
  at 
  the 
  ends 
  of 
  the 
  twigs, 
  and 
  a 
  few 
  blossoms 
  buds 
  are 
  

   opening, 
  (pi. 
  4 
  ) 
  The 
  leaves 
  are 
  starting 
  on 
  the 
  tips 
  of 
  some 
  twigs 
  on 
  

   tree 
  107 
  and 
  on 
  its 
  suckers. 
  The 
  suckers 
  on 
  these 
  young 
  trees, 
  20 
  and 
  

   107, 
  show 
  to 
  some 
  extent 
  how 
  seriously 
  the 
  scales 
  have 
  affected 
  them. 
  

  

  