﻿ORCHARD 
  INSECTS 
  PACIFIC 
  XORTHT\^EST 
  

  

  9 
  

  

  webbing, 
  making 
  a 
  sort 
  of 
  nest, 
  hatch 
  the 
  following 
  spring 
  as 
  soon 
  

   They 
  feed 
  within 
  this 
  enclosure, 
  as 
  the 
  buds 
  begin 
  to 
  open, 
  

   eating 
  large, 
  irregular 
  holes 
  in 
  the 
  The 
  caterpillars 
  are 
  active, 
  

   fruit 
  (fig. 
  9) 
  and 
  foliage. 
  In 
  ex- 
  crawling 
  backward 
  about 
  as 
  rapid- 
  

   ly 
  as 
  forward, 
  and 
  often 
  drop 
  to 
  

   4 
  ' 
  the 
  ground 
  on 
  a 
  thread 
  if 
  dis- 
  

  

  turbed. 
  They 
  become 
  fvdl-grown 
  

  

  U^ 
  

  

  Figure 
  9. 
  — 
  Apples 
  eaten 
  by 
  larvae 
  of 
  the 
  

   fruit 
  tree 
  leaf 
  roller. 
  

  

  treme 
  cases 
  they 
  practically 
  defoli- 
  

   ate 
  the 
  trees 
  and 
  destroy 
  the 
  entire 
  

   crop. 
  Where 
  much 
  spraying 
  is 
  

   done 
  for 
  the 
  codling 
  moth 
  and 
  the 
  

   San 
  Jose 
  scale, 
  the 
  fruit 
  tree 
  leaf 
  

   roller 
  has 
  not 
  been 
  an 
  important 
  

   pest, 
  but 
  occasionally 
  serious 
  out- 
  

   breaks 
  have 
  occurred 
  elsewhere. 
  

   The 
  insect 
  has 
  periodically 
  be- 
  

   come 
  of 
  x^rime 
  importance 
  in 
  the 
  

   Pacific 
  Xorthwest, 
  remained 
  so 
  

   for 
  a 
  few 
  years, 
  and 
  then 
  again 
  

   subsided 
  into 
  relative 
  unimpor- 
  

   tance. 
  It 
  is 
  a 
  native 
  insect 
  which 
  

   originally 
  fed 
  on 
  a 
  number 
  of 
  wild 
  

   plants. 
  

  

  LIFE 
  HISTORY 
  

  

  The 
  fruit 
  tree 
  leaf 
  roller 
  winters 
  

   in 
  the 
  egg 
  stage. 
  The 
  eggs 
  are 
  laid 
  

   during 
  June 
  and 
  July, 
  each 
  female 
  

   depositing 
  her 
  eggs 
  in 
  a 
  single 
  

   mass 
  (fig. 
  10, 
  J.) 
  , 
  unless 
  disturbed. 
  

   The 
  egg 
  masses, 
  each 
  containing 
  

   100 
  or 
  more 
  eggs, 
  are 
  rather 
  incon- 
  

   spicuous, 
  oval, 
  grayish 
  or 
  brown- 
  

   ish 
  patches, 
  nearly 
  one-fourth 
  inch 
  

   long, 
  on 
  the 
  limbs, 
  twigs, 
  and 
  

   trunks 
  of 
  the 
  trees. 
  The 
  eggs 
  

  

  890478=— 
  50 
  -2 
  

  

  

  B 
  

  

  Figure 
  10. 
  — 
  Fruit 
  tree 
  leaf 
  roller: 
  A, 
  Egg 
  

   mass; 
  B, 
  adult 
  moth 
  and 
  leaf 
  curled 
  

   around 
  cocoon, 
  with 
  empt}' 
  pupal 
  skin 
  

   attached. 
  Enlarged. 
  

  

  