﻿ORCHARD 
  INSECTS 
  PACIFIC 
  NORTHWEST 
  

  

  47 
  

  

  Oil 
  emulsion 
  at 
  the 
  rate 
  of 
  2 
  gal- 
  

   lons 
  to 
  100 
  gallons 
  of 
  spray 
  may 
  

   be 
  added 
  to 
  the 
  lead 
  arsenate 
  to 
  

   control 
  aphids. 
  If 
  the 
  worms 
  have 
  

   not 
  been 
  controlled 
  before 
  the 
  blos- 
  

   soms 
  open, 
  basic 
  lead 
  arsenate 
  may 
  

   be 
  applied 
  at 
  the 
  rate 
  of 
  -t 
  pounds 
  

   to 
  100 
  gallons 
  after 
  the 
  petals 
  have 
  

   dropped. 
  

  

  Oriental 
  Fruit 
  Moth 
  

  

  The 
  oriental 
  fruit 
  moth 
  (fig. 
  55) 
  

   was 
  discovered 
  in 
  the 
  District 
  of 
  

   Columbia 
  in 
  1916, 
  having 
  been 
  

   brought 
  in 
  from 
  Japan 
  in 
  ship- 
  

   ments 
  of 
  flowering 
  cherry, 
  peach, 
  

   or 
  other 
  fruit 
  trees. 
  It 
  seems 
  to 
  

  

  

  Figure 
  55. 
  — 
  Adult 
  oriental 
  fruit 
  moth. 
  

   Enlarged. 
  

  

  have 
  been 
  introduced 
  into 
  Japan 
  

   about 
  10 
  years 
  earlier 
  from 
  other 
  

   parts 
  of 
  the 
  Orient. 
  It 
  has 
  gradu- 
  

   ally 
  spread 
  throughout 
  the 
  United 
  

   States 
  until 
  now 
  it 
  is 
  present 
  in 
  

   most 
  of 
  the 
  peach-growing 
  dis- 
  

   tricts. 
  Moths 
  were 
  first 
  caught 
  in 
  

   baits 
  in 
  Idaho 
  in 
  1944, 
  and 
  in 
  Ore- 
  

   gon 
  and 
  Washington 
  in 
  1945. 
  The 
  

  

  first 
  infestation 
  of 
  any 
  conse- 
  

   quence 
  in 
  the 
  Pacific 
  Northwest 
  

   was 
  found 
  in 
  the 
  lower 
  Yakima 
  

   Valley 
  in 
  the 
  fall 
  of 
  1948. 
  

  

  The 
  only 
  injurious 
  stage 
  of 
  the 
  

   oriental 
  fruit 
  moth 
  is 
  the 
  larva, 
  or 
  

   worm. 
  The 
  young 
  worms 
  burrow 
  

   into 
  the 
  rapidly 
  growing 
  twigs 
  

   near 
  the 
  tips 
  and 
  feed 
  on 
  the 
  cen- 
  

  

  Figure 
  56. 
  — 
  Peach 
  twigs 
  injured 
  by 
  the 
  

   oriental 
  fruit 
  moth. 
  

  

  tral 
  core 
  (fig. 
  56). 
  They 
  also 
  en- 
  

   ter 
  the 
  fruit, 
  particularly 
  near 
  the 
  

   end 
  of 
  the 
  season, 
  either 
  through 
  

   the 
  stem 
  or 
  through 
  the 
  side, 
  and 
  

   feed 
  on 
  the 
  flesh 
  around 
  the 
  pit 
  

   (fig. 
  57). 
  The 
  worms 
  usually 
  

   leave 
  through 
  holes 
  in 
  the 
  side 
  and 
  

   often 
  considerable 
  gum 
  exudes 
  

   from 
  the 
  holes. 
  Injury 
  to 
  the 
  

   twigs 
  prevents 
  the 
  tree 
  from 
  grow- 
  

   ing 
  normally, 
  as 
  it 
  may 
  send 
  out 
  

   several 
  lateral 
  twigs 
  just 
  below 
  the 
  

   injury. 
  Injury 
  to 
  the 
  fruit 
  usu- 
  

   ally 
  ruins 
  it 
  for 
  consumption. 
  

  

  The 
  oriental 
  fruit 
  moth 
  attacks 
  

   peaches 
  primarily, 
  but 
  it 
  also 
  feeds 
  

   on 
  all 
  the 
  other 
  deciduous 
  fruits. 
  

   In 
  the 
  Pacific 
  Northwest 
  it 
  should 
  

  

  