﻿97^ 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  May 
  14. 
  Tree 
  20 
  has 
  only 
  a 
  few 
  tips 
  and 
  the 
  suckers 
  starting. 
  Its 
  

   condition 
  at 
  this 
  time 
  is 
  represented 
  on 
  pi. 
  6. 
  Tree 
  21 
  . 
  The 
  tips 
  of 
  most 
  

   of 
  the 
  branches 
  bear 
  only 
  a 
  few 
  leaves. 
  There 
  are 
  very 
  few 
  blossoms. 
  

   Tree 
  107. 
  The 
  leaves 
  are 
  starting 
  on 
  only 
  a 
  few 
  twigs 
  and 
  suckers. 
  

  

  May 
  28. 
  Tree 
  20. 
  Only 
  four 
  small 
  twigs 
  in 
  the 
  top 
  have 
  developed 
  

   leaves, 
  and 
  these 
  are 
  small. 
  The 
  foliage 
  of 
  the 
  suckers 
  is 
  vigorous, 
  

   though 
  light. 
  Tree 
  21. 
  The 
  leaves 
  are 
  rather 
  abundant 
  for 
  a 
  tree 
  treated 
  

   with 
  kerosene. 
  The 
  top 
  of 
  tree 
  107 
  is 
  nearly 
  dead. 
  The 
  foliage 
  of 
  the 
  

   suckers 
  is 
  rather 
  vigorous. 
  

  

  June 
  20, 
  There 
  are 
  only 
  a 
  few 
  leaves 
  in 
  the 
  top 
  of 
  tree 
  20. 
  The 
  

   suckers 
  were 
  trimmed 
  down 
  to 
  one. 
  The 
  leaves 
  out 
  pretty 
  well 
  on 
  some 
  

   branches 
  and 
  a 
  number 
  of 
  others 
  are 
  dead. 
  Suckers 
  are 
  being 
  thrown 
  

   out, 
  and 
  the 
  tree 
  may 
  eventually 
  recover. 
  The 
  top 
  of 
  tree 
  107 
  died 
  

   and 
  was 
  cut 
  off. 
  

  

  July 
  2. 
  There 
  are 
  apparently 
  no 
  living 
  scales 
  on 
  trees 
  20 
  and 
  107; 
  on 
  

   tree 
  21 
  they 
  are 
  rather 
  abundant. 
  For 
  cond 
  ition 
  of 
  tree 
  21 
  at 
  this 
  time 
  

   see 
  pi, 
  4. 
  

  

  Aug. 
  3. 
  There 
  are 
  apparently 
  no 
  living 
  young 
  on 
  tree 
  20, 
  and 
  but 
  a 
  

   few 
  on 
  tree 
  21. 
  Many 
  living 
  young 
  are 
  found 
  on 
  tree 
  107. 
  

  

  Sep. 
  7. 
  The 
  top 
  of 
  tree 
  20 
  is 
  dead 
  and 
  the 
  suckers 
  are 
  growing 
  rather 
  

   vigorously. 
  Young 
  are 
  abundant 
  On 
  tree 
  21. 
  Tree 
  107 
  was 
  cut 
  back, 
  

   and 
  only 
  the 
  stump 
  remains. 
  

  

  Oct. 
  25. 
  Even 
  the 
  suckers 
  of 
  tree 
  20 
  are 
  in 
  bad 
  condition 
  and 
  

   appear 
  to 
  be 
  dying 
  back. 
  There 
  are 
  many 
  suckers 
  on 
  tree 
  21, 
  and 
  con- 
  

   siderable 
  scale, 
  but 
  it 
  is 
  not 
  in 
  very 
  bad 
  condition. 
  

  

  Experiments 
  with 
  crude 
  petroleum 
  against 
  San 
  Jose 
  scale. 
  

  

  Considerable 
  has 
  been 
  said 
  in 
  recent 
  months 
  about 
  the 
  value 
  of 
  crude 
  

   petroleum, 
  and 
  one 
  entomologist 
  has 
  stated, 
  in 
  giving 
  his 
  conclusions 
  

   regarding 
  its 
  effects 
  on 
  fruit 
  trees, 
  that 
  this 
  substance 
  " 
  is 
  harmless 
  to 
  the 
  

   most 
  tender 
  varieties 
  and 
  on 
  the 
  youngest 
  trees." 
  This 
  opinion 
  has 
  since 
  

   been 
  modified, 
  it 
  is 
  only 
  fair 
  to 
  state. 
  Crude 
  petroleum 
  is 
  undoubtedly 
  

   a 
  valuable 
  insecticide 
  when 
  its 
  use 
  is 
  understood, 
  and 
  when 
  a 
  product 
  

   with 
  a 
  definite 
  composition 
  can 
  be 
  secured. 
  Very 
  diverse 
  results 
  have 
  

   been 
  obtained 
  by 
  experimenters 
  with 
  this 
  material, 
  and 
  some 
  of 
  them, 
  

   at 
  least, 
  can 
  undoubtedly 
  be 
  charged 
  to 
  the 
  difference 
  in 
  composition 
  of 
  

   the 
  petroleum. 
  Crude 
  petroleum, 
  as 
  now 
  placed 
  on 
  the 
  market, 
  is 
  a 
  

   mixture 
  of 
  the 
  product 
  of 
  a 
  number 
  of 
  wells, 
  the 
  proportion 
  of 
  oil 
  from 
  

   each 
  varying 
  with 
  the 
  productivity 
  of 
  the 
  well 
  and 
  influencing 
  the 
  com- 
  

   position 
  of 
  the 
  whole 
  to 
  some 
  extent, 
  at 
  least. 
  The 
  oil 
  used 
  in 
  the 
  

  

  