﻿30 
  

  

  CIRCrLAR 
  2 
  7 
  0. 
  U 
  

  

  DEPARTMEXT 
  OE 
  AGRICrLTrRE 
  

  

  prop? 
  and 
  the 
  tree 
  trunks 
  with, 
  cot- 
  

   ton 
  or 
  some 
  sticky 
  substance 
  in 
  

   August 
  and 
  leaving 
  the 
  bands 
  on 
  

   until 
  after 
  the 
  frtiit 
  has 
  been 
  

   harvested. 
  

  

  Ants 
  

  

  Orchards 
  of 
  the 
  Pacific 
  Xorth- 
  

   west 
  are 
  sometimes 
  troubled 
  by 
  

   ants, 
  particidarly 
  the 
  large, 
  pug- 
  

   nacious 
  re<:l 
  ants 
  ^Fornuca 
  spp. 
  ) 
  . 
  

   that 
  build 
  nests 
  in 
  the 
  H'ruund. 
  

   often 
  covered 
  with 
  rather 
  con- 
  

   spicuous 
  heaps 
  of 
  dried 
  stems 
  and 
  

   twigs 
  of 
  plants. 
  These 
  ants 
  are 
  

   attracted 
  to 
  the 
  trees 
  primarily 
  to 
  

   feed 
  on 
  the 
  honey 
  dew 
  excreted 
  by 
  

   apliids. 
  At 
  times 
  the 
  ants 
  may 
  

   chew 
  the 
  blos-oms 
  and 
  cause 
  direct 
  

   injury. 
  If 
  the 
  nests 
  are 
  not 
  ad- 
  

   jacent 
  to 
  the 
  trees 
  or 
  other 
  valtt- 
  

   able 
  plants, 
  the 
  ants 
  may 
  be 
  eradi- 
  

   cated 
  or 
  greatly 
  reduced 
  in 
  

   numbers 
  by 
  placing 
  about 
  an 
  

   omice 
  of 
  granular 
  calcitmi 
  cyanide 
  

   in 
  the 
  center 
  of 
  the 
  hill 
  or 
  nest, 
  

   several 
  inches 
  Ijelow 
  the 
  surface, 
  

   and 
  covering 
  it 
  with 
  dirt. 
  This 
  

   material 
  is 
  dangerous 
  to 
  use 
  near 
  

   growing 
  plants, 
  and 
  in 
  such 
  cases 
  

   some 
  control 
  may 
  be 
  obtained 
  by 
  

   drenching 
  the 
  nests 
  with 
  water 
  

   containing 
  pyrethrinn 
  extract. 
  

   The 
  extract 
  should 
  be 
  ttsed 
  at 
  the 
  

   highest 
  strength 
  reconnnended 
  by 
  

   the 
  mantif 
  acttirer 
  ( 
  usually 
  about 
  

   1 
  gallon 
  to 
  2i 
  id 
  o-illons 
  of 
  water 
  ) 
  . 
  

   A 
  thorough 
  dusting 
  of 
  the 
  nests 
  

   with 
  DDT 
  or 
  parathion 
  dust 
  is 
  

   also 
  effective. 
  ( 
  See 
  Caution, 
  p. 
  b^. 
  ) 
  

  

  CHERRY 
  INSECTS 
  

  

  Sax 
  Jose 
  Scale 
  

  

  The 
  San 
  Jose 
  Scale 
  is 
  not 
  often 
  

   injurious 
  to 
  sour 
  cherries, 
  but 
  it 
  

   does 
  a 
  great 
  deal 
  of 
  damage 
  to 
  

   sweet 
  cherries. 
  As 
  the-e 
  trees 
  

   ustially 
  grow 
  large, 
  the 
  tops 
  are 
  

   difficult 
  to 
  spray 
  thorottghly. 
  

   Dead 
  leaves 
  sometimes 
  seen 
  cling- 
  

   ing 
  to 
  the 
  upper 
  branches 
  of 
  large 
  

   sweet 
  cherrv 
  trees 
  durinof 
  the 
  

  

  winter 
  tisttally 
  indicate 
  the 
  pres- 
  

   ence 
  of 
  this 
  scale. 
  Treatment 
  is 
  

   the 
  same 
  as 
  for 
  scale 
  on 
  apple 
  and 
  

   pear 
  trees 
  (p. 
  6 
  ) 
  . 
  The 
  tops 
  of 
  

   large 
  trees 
  may 
  be 
  reached 
  by 
  

   climbing 
  into 
  the 
  trees 
  and 
  spray- 
  

   ing 
  the 
  tops 
  first. 
  

  

  Black 
  Cherry 
  Aphid 
  

  

  The 
  black 
  cherry 
  aphid 
  is 
  a 
  

   large, 
  shiny, 
  black 
  aphid 
  which 
  

   occurs 
  on 
  the 
  young 
  foliage 
  of 
  

   cherry 
  trees 
  and 
  often 
  interferes 
  

   with 
  the 
  terminal 
  growth. 
  It 
  is 
  

   found 
  much 
  more 
  often 
  on 
  sweet 
  

   cherrv 
  trees 
  than 
  on 
  the 
  sour 
  va- 
  

  

  Figure 
  3 
  . 
  — 
  Chern,- 
  foliage 
  injured 
  by 
  the 
  

   black 
  cherry 
  aphid. 
  

  

  rieties. 
  and 
  is 
  particularly 
  in- 
  

   jurious 
  to 
  young 
  trees 
  and 
  to 
  nurs- 
  

   ery 
  stock. 
  The 
  leaves 
  of 
  infested 
  

   trees 
  are 
  severely 
  curled 
  (fig. 
  37) 
  

   and 
  covered 
  with 
  a 
  sticky 
  lioney- 
  

   dew. 
  This 
  aphid 
  is 
  a 
  Etiropean 
  

   species 
  that 
  has 
  become 
  prevalent 
  

   in 
  the 
  United 
  States. 
  

  

  LIFE 
  HISTORY 
  

  

  The 
  winter 
  eggs, 
  which 
  are 
  

   tucked 
  in 
  among 
  the 
  buds, 
  hatch 
  

   at 
  aboiu 
  the 
  time 
  the 
  buds 
  burst. 
  

   The 
  young 
  develop 
  rapidly 
  on 
  the 
  

   new 
  growth, 
  curliuii- 
  the 
  leaves 
  and 
  

   feeding 
  within 
  tlie 
  protection 
  thus 
  

   afforded. 
  There 
  are 
  several 
  gen- 
  

   erations. 
  "Winged 
  adtilts 
  develop 
  

   in 
  the 
  middle 
  of 
  the 
  stunmer 
  and 
  

  

  