﻿36 
  NEW 
  YORK 
  STATE 
  MUSEUM 
  

  

  led 
  the 
  Entomologist 
  to 
  study 
  carefully 
  the 
  cases 
  and 
  the 
  behavior 
  

   of 
  the 
  trees 
  through 
  the 
  season. 
  A 
  comparison 
  was 
  also 
  made 
  

   between 
  the 
  condition 
  of 
  these 
  trees 
  and 
  injury 
  of 
  earlier 
  years 
  

   following 
  applications 
  of 
  petroleum. 
  He 
  was 
  unable 
  to 
  note 
  any 
  

   material 
  difference 
  between 
  the 
  two 
  and, 
  furthermore, 
  observed 
  

   a 
  marked 
  restriction 
  of 
  the 
  damage 
  to 
  trees 
  or 
  even 
  portions 
  of 
  

   trees 
  which 
  had 
  received 
  the 
  application. 
  After 
  a 
  careful 
  study 
  

   of 
  the 
  various 
  phases 
  of 
  the 
  matter 
  he 
  was 
  forced 
  to 
  conclude 
  

   that 
  a 
  certain 
  measure 
  of 
  risk 
  attaches 
  to 
  the 
  application 
  of 
  min- 
  

   eral 
  oils 
  or 
  preparations 
  of 
  the 
  same 
  to 
  trees 
  in 
  a 
  dormant 
  con- 
  

   dition. 
  This 
  matter 
  is 
  discussed 
  in 
  detail 
  in 
  the 
  Entomologist's 
  

   report. 
  

  

  Fruit 
  tree 
  pests. 
  The 
  experiments 
  conducted 
  by 
  the 
  Entomol- 
  

   ogist 
  during 
  the 
  last 
  three 
  years 
  against 
  the 
  codling 
  moth 
  were 
  

   continued 
  in 
  the 
  orchard 
  of 
  Mr 
  Thomas 
  Albright, 
  of 
  New 
  Bal- 
  

   timore, 
  and 
  very 
  satisfactory 
  returns 
  obtained. 
  The 
  check 
  or 
  

   unsprayed 
  tree 
  produced 
  only 
  38.95 
  per 
  cent 
  of 
  sound 
  fruit, 
  while 
  

   sprayed 
  trees 
  of 
  the 
  same 
  variety, 
  less 
  than 
  100 
  feet 
  away, 
  yielded 
  

   over 
  97 
  and 
  in 
  some 
  instances 
  more 
  than 
  98 
  per 
  cent 
  of 
  worm- 
  

   free 
  apples. 
  The 
  results 
  of 
  this 
  experiment 
  and 
  those 
  of 
  earlier 
  

   years 
  were 
  checked 
  by 
  a 
  careful 
  study 
  of 
  representative 
  trees 
  in 
  

   the 
  orchards 
  of 
  Messrs 
  W. 
  H. 
  Hart, 
  of 
  Poughkeepsie, 
  and 
  Ed- 
  

   ward 
  Van 
  Alstyne, 
  of 
  Kinderhook. 
  These 
  latter 
  were 
  sprayed 
  

   under 
  strictly 
  commercial 
  conditions 
  with 
  no 
  expectation 
  at 
  that 
  

   time 
  of 
  their 
  being 
  subjected 
  to 
  a 
  test 
  later. 
  The 
  results 
  in 
  these 
  

   commercial 
  orchards 
  were 
  very 
  gratifying. 
  The 
  northern 
  spies 
  

   belonging 
  to 
  Mr 
  Hart 
  produced 
  an 
  average 
  of 
  over 
  98 
  per 
  cent 
  

   of 
  sound 
  fruit, 
  while 
  the 
  greenings 
  and 
  Baldwins 
  on 
  the 
  Van 
  

   Alstyne 
  place 
  gave 
  an 
  average 
  of 
  over 
  96 
  per 
  cent 
  of 
  worm-free 
  

   apples. 
  The 
  past 
  four 
  years' 
  experiments 
  go 
  far 
  to 
  show 
  that 
  

   under 
  normal 
  crop 
  conditions 
  one 
  thorough 
  and 
  timely 
  spraying 
  

   for 
  the 
  codling 
  moth 
  should 
  result 
  in 
  producing 
  from 
  95 
  to 
  98 
  

   per 
  cent 
  of 
  sound 
  fruit. 
  These 
  tests 
  are 
  of 
  great 
  practical 
  value 
  

   to 
  the 
  fruit 
  grower, 
  since 
  they 
  afford 
  a 
  reliable 
  basis 
  for 
  correctly 
  

   estimating 
  the 
  value 
  of 
  spray 
  applications. 
  

  

  The 
  pear 
  thrips, 
  a 
  minute 
  insect 
  which 
  blasted 
  or 
  nearly 
  de- 
  

   stroyed 
  the 
  pear 
  crop 
  in 
  a 
  few 
  orchards 
  in 
  the 
  Hudson 
  valley, 
  

   was 
  studied 
  with 
  special 
  reference 
  to 
  conditions 
  favoring 
  injury, 
  

   and 
  the 
  efficacy 
  of 
  spraying 
  with 
  a 
  tobacco 
  preparation 
  demon- 
  

   strated. 
  The 
  insect, 
  potentially 
  a 
  very 
  dangerous 
  form, 
  is 
  discussed 
  

  

  