﻿ORCHARD 
  IXSECTS 
  PACIFIC 
  XORTim-EST 
  

  

  21 
  

  

  ing-oil 
  emulsion 
  kills 
  most 
  of 
  the 
  

   eggs 
  in 
  the 
  twigs 
  and 
  may 
  reduce 
  

   the 
  infestation 
  the 
  following 
  year. 
  

  

  Lygus 
  Bugs 
  

  

  L^^gus 
  bugs 
  sometimes 
  cause 
  

   considerable 
  injury 
  to 
  pears 
  (fig. 
  

   25) 
  and 
  Delicious 
  apples. 
  For 
  a 
  

  

  \ 
  

  

  Figure 
  25. 
  

  

  .*•- 
  

  

  -Young 
  pears 
  injured 
  by 
  

   lygus 
  bugs. 
  

  

  description 
  of 
  these 
  bugs 
  and 
  for 
  

   methods 
  of 
  controlling 
  them, 
  see 
  

   page 
  50. 
  

  

  BoxELDER 
  Bugs 
  

  

  Occasionally 
  clusters 
  of 
  flat 
  

   bugs, 
  black 
  with 
  red 
  lines 
  and 
  

   about 
  one-half 
  inch 
  lonof. 
  are 
  

  

  1 
  

  

  which 
  occur 
  chiefly 
  in 
  the 
  vicinity 
  

   of 
  boxelder 
  trees. 
  They 
  are 
  some- 
  

   times 
  mistaken 
  for 
  lygus 
  bugs, 
  but 
  

   may 
  be 
  distinguished 
  by 
  their 
  

   large 
  size 
  and 
  conspicuous 
  color- 
  

   ing. 
  The 
  adults 
  hibernate 
  in 
  

   swarms 
  m 
  crevices 
  about 
  trees 
  and 
  

   buildings, 
  and 
  the 
  young, 
  which 
  

   hatch 
  from 
  eggs 
  laid 
  in 
  the 
  spring, 
  

   feed 
  on 
  the 
  boxelder 
  trees. 
  

  

  Control 
  consists 
  mainly 
  in 
  pre- 
  

   vention. 
  Boxelder 
  trees 
  are 
  of 
  

   two 
  kinds, 
  those 
  that 
  bear 
  seeds 
  

   and 
  those 
  that 
  do 
  not. 
  and 
  only 
  

   the 
  latter 
  should 
  be 
  planted, 
  as 
  the 
  

   bugs 
  live 
  mostly 
  on 
  the 
  former 
  

   kind. 
  Seed-bearing 
  trees 
  in 
  the 
  

   vicinity 
  of 
  orchards 
  should 
  be 
  re- 
  

   placed 
  with 
  other 
  kinds 
  of 
  shade 
  

   trees 
  if 
  possible. 
  The 
  hibernating 
  

   adults 
  may 
  be 
  destroyed 
  with 
  a 
  

   spray 
  of 
  kerosene 
  or 
  strong 
  oil 
  

   emulsion. 
  

  

  Climbing 
  Cuiavorms 
  

  

  Apple 
  and 
  pear 
  trees 
  are 
  occa- 
  

   sionally 
  attacked 
  by 
  climbing 
  cut- 
  

   worms, 
  although 
  they 
  injure 
  

   peaches 
  chiefly. 
  For 
  a 
  description 
  

   of 
  these 
  insects 
  and 
  methods 
  of 
  

   control, 
  see 
  page 
  50. 
  

  

  Green 
  Fruitworms 
  

  

  Eelated 
  to 
  the 
  cutworms 
  are 
  the 
  

   green 
  fruitworms. 
  When 
  young 
  

   these 
  worms 
  feed 
  on 
  buds 
  and 
  

  

  

  -Boxelder 
  bugs 
  feeding 
  on 
  

   an 
  apple. 
  

  

  Figure 
  27. 
  — 
  Green 
  fruitworm 
  feeding 
  en 
  

   an 
  apple. 
  

  

  Figure 
  26 
  

  

  leaves 
  and 
  are 
  not 
  often 
  noticed, 
  

   found 
  feeding 
  on 
  the 
  maturing 
  but 
  when 
  about 
  half-grown 
  they 
  

   fruit 
  of 
  apple 
  and 
  pear 
  trees 
  (fig. 
  begin 
  feeding 
  on 
  the 
  fruit 
  (fig. 
  

   26). 
  These 
  are 
  boxelder 
  bugs 
  27). 
  They 
  are 
  then 
  smooth 
  green 
  

  

  