﻿52 
  

  

  CIRCULAR 
  2 
  70, 
  U. 
  S. 
  DEPARTMENT 
  OF 
  AGRICULTURE 
  

  

  west. 
  For 
  a 
  discussion 
  of 
  this 
  in- 
  

   sect 
  see 
  page 
  38. 
  

  

  Stone 
  Flies 
  

  

  Stone 
  flies 
  or 
  salmon 
  flies 
  oc- 
  

   casionally 
  injure 
  the 
  buds 
  of 
  peach, 
  

   apricot, 
  and 
  plum 
  trees 
  in 
  the 
  

  

  1^.— 
  <- 
  

  

  Figure 
  62. 
  

  

  -Stone 
  fly 
  feeding 
  on 
  peach 
  

   buds. 
  

  

  They 
  often 
  climb 
  into 
  fruit 
  trees, 
  

   particularly 
  apricot 
  and 
  peach 
  

   trees, 
  and 
  feed 
  on 
  the 
  ripening 
  

   fruit. 
  They 
  also 
  feed 
  on 
  various 
  

   veo;etables 
  and 
  flowers. 
  

  

  spring 
  (fig. 
  62), 
  particularly 
  

   where 
  these 
  trees 
  are 
  growing 
  near 
  

   the 
  Columbia 
  River 
  or 
  some 
  other 
  

   large 
  stream. 
  The 
  young 
  insects 
  

   live 
  in 
  the 
  streams. 
  The 
  adult 
  flies 
  

   emerge 
  early 
  in 
  the 
  spring, 
  when 
  

   thousands 
  of 
  cast 
  skins 
  may 
  be 
  

   found 
  among 
  the 
  rocks 
  along 
  the 
  

   stream 
  banks. 
  The 
  flies 
  feed 
  on 
  

   the 
  fruit 
  buds 
  mostly 
  during 
  

   warm, 
  sunny 
  weather, 
  destroying 
  

   many 
  of 
  the 
  buds 
  and 
  injuring 
  

   others 
  so 
  that 
  they 
  produce 
  de- 
  

   formed 
  fruit. 
  If 
  control 
  is 
  neces- 
  

   sary, 
  lead 
  arsenate, 
  2 
  pounds 
  to 
  

   100 
  gallons 
  of 
  water, 
  should 
  be 
  

   effective 
  if 
  applied 
  as 
  soon 
  as 
  the 
  

   insects 
  appear. 
  

  

  Earwigs 
  

  

  The 
  European 
  earwig 
  has 
  

   spread 
  into 
  many 
  of 
  the 
  fruit- 
  

   growing 
  areas 
  of 
  the 
  Pacific 
  

   Northwest. 
  It 
  is 
  most 
  often 
  seen 
  

   in 
  the 
  adult 
  stage 
  (fig. 
  63) 
  as 
  a 
  

   slender, 
  shining 
  brown 
  insect, 
  

   about 
  two-thirds 
  inch 
  long, 
  with 
  a 
  

   pair 
  of 
  consj^icuous 
  forceps 
  on 
  the 
  

   posterior 
  end. 
  The 
  insects 
  hide 
  

   under 
  leaves 
  and 
  trash 
  during 
  the 
  

   day 
  and 
  feed 
  mostly 
  at 
  night. 
  

  

  Figure 
  63.- 
  

  

  -Adult 
  European 
  earwig. 
  

   Enlarged. 
  

  

  CONTROL 
  

  

  To 
  keep 
  earwigs 
  out 
  of 
  fruit 
  

   trees, 
  the 
  soil 
  at 
  the 
  base 
  of 
  the 
  

   trees 
  and 
  the 
  tree 
  trunks 
  should 
  be 
  

   thoroughly 
  dusted 
  with 
  10-percent 
  

   DDT 
  about 
  a 
  month 
  before 
  the 
  

   fruit 
  ripens. 
  

  

  NUT 
  INSECTS 
  

  

  FiLBERTWORM 
  

  

  The 
  filbertworm, 
  also 
  known 
  as 
  

   the 
  Catalina 
  cherry 
  moth, 
  is 
  the 
  

   most 
  serious 
  pest 
  of 
  filberts 
  in 
  

   western 
  Oregon 
  and 
  Washington. 
  

   It 
  is 
  generally 
  distributed 
  

   throughout 
  the 
  Pacific 
  Northwest, 
  

   but 
  causes 
  commercial 
  loss 
  only 
  in 
  

   certain 
  localities. 
  This 
  worm 
  is 
  

   the 
  larva 
  of 
  a 
  pale 
  to 
  dusky 
  moth 
  

   having 
  two 
  coppery 
  bands 
  near 
  

  

  