﻿ORCSARD 
  INSECTS 
  PACIFIC 
  XORTITVV^EST 
  

  

  43 
  

  

  injury 
  is 
  of 
  little 
  consequence. 
  

   Much 
  of 
  the 
  injured 
  fruit 
  drops 
  

   prematurely 
  and 
  the 
  remainder 
  is 
  

   unfit 
  for 
  market. 
  The 
  adult 
  

   crickets 
  are 
  slightly 
  more 
  than 
  

   one-half 
  inch 
  long, 
  and 
  light 
  

   green 
  or 
  yellowish. 
  The 
  female 
  

   (fig. 
  50, 
  B) 
  has 
  narrow, 
  trans- 
  

   parent 
  wings, 
  and 
  the 
  male 
  has 
  

   somewhat 
  broader 
  wings. 
  There 
  

   is 
  but 
  one 
  generation 
  a 
  year, 
  and 
  

   the 
  adults 
  may 
  be 
  found 
  in 
  the 
  

   orchards 
  from 
  July 
  until 
  frost 
  

   occurs. 
  

  

  CONTROL 
  

  

  The 
  injury 
  caused 
  by 
  the 
  snowy 
  

   tree 
  cricket 
  may 
  largely 
  be 
  pre- 
  

   vented 
  by 
  poisoning 
  the 
  crickets 
  

   while 
  they 
  are 
  still 
  feeding 
  on 
  the 
  

   leaves 
  and 
  before 
  they 
  have 
  begun 
  

   to 
  eat 
  holes 
  in 
  the 
  fruit. 
  In 
  

   southern 
  Idaho 
  this 
  may 
  be 
  done 
  

   between 
  July 
  15 
  and 
  August 
  1. 
  

   The 
  trees 
  may 
  be 
  sprayed 
  with 
  

   lead 
  arsenate, 
  2 
  pounds 
  to 
  100 
  

   gallons 
  of 
  water, 
  to 
  which 
  is 
  added 
  

   1 
  pound 
  of 
  spreader. 
  

  

  Syneta 
  Leaf 
  Beetle 
  

  

  The 
  syneta 
  leaf 
  beetle 
  ordi- 
  

   narily 
  does 
  not 
  injure 
  prunes 
  so 
  

   severely 
  as 
  it 
  injures 
  pears 
  and 
  

   cherries 
  (pp. 
  24 
  and 
  34). 
  Most 
  

   of 
  the 
  prunes 
  grown 
  in 
  the 
  area 
  

   where 
  this 
  beetle 
  occurs 
  are 
  sold 
  

   in 
  the 
  dried 
  form 
  and 
  the 
  smaller 
  

   injuries 
  are 
  of 
  less 
  consequence 
  

   than 
  those 
  on 
  fruit 
  that 
  is 
  to 
  be 
  

   marketed 
  green 
  or 
  fresh. 
  Large 
  

   russeted 
  areas 
  on 
  the 
  prunes 
  de- 
  

   tract 
  from 
  the 
  appearance 
  of 
  the 
  

   dried 
  product 
  (fig. 
  51) 
  and 
  make 
  

   the 
  fresh 
  fruit 
  unmarketable. 
  

  

  CONTROL 
  

  

  Lead 
  arsenate. 
  3 
  or 
  4 
  pounds 
  to 
  

   100 
  gallons, 
  will 
  control 
  this 
  

   beetle 
  on 
  prunes. 
  It 
  is 
  most 
  effec- 
  

   tive 
  if 
  used 
  just 
  before 
  and 
  just 
  

   after 
  the 
  blooming 
  period 
  ; 
  it 
  may 
  

  

  be 
  added 
  to 
  the 
  fungicides 
  used 
  at 
  

   that 
  time 
  for 
  the 
  control 
  of 
  brown 
  

   rot. 
  A 
  third 
  application 
  when 
  

   the 
  husks 
  have 
  fallen 
  may 
  be 
  

   necessary 
  if 
  the 
  infestation 
  is 
  

   severe. 
  

  

  Figure 
  51. 
  — 
  Dried 
  prunes: 
  A, 
  Russeted 
  

   by 
  syneta 
  leaf 
  beetle; 
  B, 
  uninjured. 
  

  

  Caterpillars 
  

  

  The 
  caterpillars 
  of 
  various 
  

   moths 
  often 
  become 
  injurious 
  to 
  

   prune 
  trees 
  in 
  western 
  Oregon 
  and 
  

   Washington. 
  They 
  are 
  most 
  

   likely 
  to 
  be 
  the 
  tent 
  caterpillars, 
  

   fall 
  webworms, 
  or 
  caterpillars 
  of 
  

   tussock 
  moths. 
  A 
  discussion 
  of 
  

   these 
  insects 
  will 
  be 
  found 
  on 
  

   pages 
  24 
  to 
  26. 
  

  

  Peach 
  Twig 
  Borer 
  

  

  Prune 
  trees 
  are 
  attacked 
  by 
  the 
  

   peach 
  twig 
  borer 
  in 
  much 
  the 
  same 
  

   manner 
  as 
  are 
  peach 
  trees. 
  The 
  

   brown 
  worms 
  bore 
  into 
  the 
  tender 
  

   new 
  growth, 
  causing 
  the 
  leaves 
  to 
  

   wilt, 
  and 
  later 
  they 
  feed 
  in 
  the 
  

   fruit. 
  The 
  life 
  history 
  and 
  con- 
  

   trol 
  of 
  this 
  pest 
  are 
  given 
  on 
  page 
  

   46. 
  

  

  