﻿48 
  

  

  CIRCULAR 
  2 
  70, 
  U. 
  S. 
  DEPARTMENT 
  OF 
  AGRICULTURE 
  

  

  not 
  be 
  troublesome 
  on 
  the 
  other 
  

   fruits 
  because 
  they 
  are 
  harvested 
  

   early 
  or 
  because 
  of 
  control 
  meas- 
  

   ures 
  applied 
  for 
  other 
  insects. 
  

  

  Figure 
  57. 
  — 
  Oriental 
  fruit 
  moth 
  larva 
  in 
  

   a 
  peach. 
  

  

  LIFE 
  HISTORY 
  

  

  The 
  oriental 
  fruit 
  moth 
  winters 
  

   in 
  much 
  the 
  same 
  manner 
  as 
  the 
  

   codling 
  moth 
  — 
  that 
  is, 
  as 
  a 
  full- 
  

   grown 
  worm 
  in 
  a 
  cocoon 
  on 
  the 
  

   tree 
  or 
  in 
  leaves 
  or 
  stems 
  on 
  the 
  

   ground. 
  The 
  moths 
  emerge 
  in 
  the 
  

   spring 
  shortly 
  before 
  the 
  peach 
  

   trees 
  are 
  in 
  bloom 
  and 
  are 
  flying 
  

   for 
  about 
  a 
  month. 
  Eggs 
  are 
  usu- 
  

   ally 
  laid 
  singly 
  on 
  the 
  upper 
  sur- 
  

   faces 
  of 
  the 
  leaves. 
  There 
  may 
  be 
  

   four 
  or 
  five 
  broods 
  a 
  year 
  in 
  the 
  

   Pacific 
  Northwest. 
  

  

  CONTROL 
  

  

  In 
  the 
  eastern 
  United 
  States 
  the 
  

   oriental 
  fruit 
  moth 
  may 
  be 
  con- 
  

   trolled 
  by 
  applying 
  several 
  sprays 
  

   or 
  dusts 
  of 
  DDT 
  in 
  July 
  and 
  Au- 
  

  

  gust 
  to 
  kill 
  the 
  second 
  and 
  third 
  

   broods 
  of 
  worms. 
  In 
  the 
  Pacific 
  

   Northwest 
  good 
  control 
  may 
  be 
  ob- 
  

   tained 
  with 
  two 
  sprays 
  of 
  DDT 
  

   applied 
  in 
  April 
  or 
  May, 
  when 
  the 
  

   spring-brood 
  moths 
  are 
  flying, 
  the 
  

   first 
  one 
  as 
  soon 
  as 
  the 
  petals 
  start 
  

   dropping 
  from 
  peach 
  trees, 
  and 
  

   the 
  second 
  about 
  12 
  to 
  14 
  days 
  

   later. 
  A 
  third 
  application 
  should 
  

   be 
  made 
  in 
  June 
  when 
  the 
  next 
  

   brood 
  of 
  moths 
  appears. 
  The 
  

   spray 
  should 
  contain 
  2 
  pounds 
  of 
  

   50-percent 
  DDT 
  wettable 
  powder 
  

   to 
  100 
  gallons 
  of 
  water. 
  An 
  acari- 
  

   cide 
  should 
  be 
  added 
  to 
  the 
  third 
  

   application 
  to 
  prevent 
  mites 
  from 
  

   developing. 
  Only 
  the 
  first 
  appli- 
  

   cation 
  is 
  necessary 
  for 
  apricots. 
  

   Dusting 
  is 
  less 
  effective 
  than 
  

   spraying. 
  

  

  Some 
  control 
  of 
  the 
  oriental 
  

   fruit 
  moth 
  with 
  parasites 
  has 
  been 
  

   obtained 
  in 
  the 
  East, 
  but 
  because 
  

   of 
  the 
  general 
  use 
  of 
  DDT 
  in 
  the 
  

   Pacific 
  Northwest, 
  this 
  method 
  

   would 
  not 
  be 
  likely 
  to 
  succeed 
  

   there. 
  

  

  Pandemis 
  Moth 
  

  

  The 
  larva 
  of 
  the 
  pandemis 
  moth 
  

   at 
  times 
  seriously 
  injures 
  ripening 
  

   apricots. 
  For 
  a 
  discussion 
  of 
  this 
  

   insect 
  and 
  its 
  control, 
  see 
  page 
  33. 
  

  

  San 
  Jose 
  Scale 
  

  

  The 
  San 
  Jose 
  scale 
  is 
  not 
  so 
  in- 
  

   jurious 
  to 
  peach 
  as 
  to 
  apple 
  and 
  

   pear, 
  and 
  it 
  seldom 
  injures 
  apri- 
  

   cot. 
  For 
  a 
  description 
  of 
  this 
  in- 
  

   sect 
  and 
  for 
  methods 
  of 
  control, 
  

   see 
  page 
  4. 
  The 
  methods 
  used 
  

   against 
  other 
  insects, 
  such 
  as 
  the 
  

   peach 
  twig 
  borer 
  or 
  aphicls, 
  usu- 
  

   ally 
  control 
  this 
  scale. 
  

  

  European 
  Fruit 
  Lecanium 
  

  

  The 
  European 
  fruit 
  lecanium 
  

   attacks 
  peach 
  and 
  apricot 
  trees, 
  as 
  

   well 
  as 
  prunes 
  and 
  other 
  decidu- 
  

   ous 
  fruits. 
  For 
  a 
  discussion 
  of 
  the 
  

   life 
  history 
  and 
  control 
  of 
  this 
  

   insect, 
  see 
  page 
  35. 
  

  

  