﻿should 
  be 
  added. 
  This 
  holds 
  the 
  arsenical 
  to 
  the 
  tree 
  and 
  also 
  marks 
  

   the 
  tree 
  so 
  that 
  the 
  thoroughness 
  of 
  the 
  application 
  may 
  be 
  visible 
  to 
  

   the 
  eye. 
  

  

  WooDWORTH 
  (C. 
  W.). 
  The 
  Woolly 
  Aphis. 
  — 
  University 
  of 
  California^ 
  

   Coll. 
  of 
  Agric, 
  Berkeley, 
  Circ. 
  no. 
  102, 
  June 
  1913, 
  4 
  pp., 
  1 
  fig. 
  

  

  Beheved 
  to 
  be 
  of 
  American 
  origin, 
  and 
  called 
  " 
  American 
  blight 
  " 
  

   by 
  English 
  entomologists, 
  this 
  insect 
  has 
  now 
  been 
  shown 
  to 
  be 
  another 
  

   form 
  of 
  the 
  elm 
  aphis 
  (Eriosoma 
  ulmi). 
  

  

  " 
  Northern 
  Spy 
  " 
  roots 
  have 
  been 
  used 
  with 
  great 
  success 
  against 
  

   it 
  in 
  Australia, 
  where 
  it 
  is 
  a 
  serious 
  pest. 
  They 
  are 
  equally 
  efficient 
  

   in 
  California, 
  and 
  should 
  be 
  used 
  wherever 
  the 
  woolly 
  aphis 
  requires- 
  

   .combating. 
  If 
  nursery 
  stock 
  is 
  wanted 
  quite 
  free 
  from 
  the 
  insect, 
  

   the 
  production 
  of 
  winged 
  forms 
  in 
  the 
  neighbourhood 
  of 
  the 
  nursery 
  

   should 
  be 
  prevented. 
  Elm 
  trees 
  should 
  be 
  carefully 
  inspected 
  in 
  

   spring, 
  and 
  as 
  soon 
  as 
  the 
  swollen 
  leaves 
  become 
  conspicuous 
  these 
  

   should 
  be 
  removed. 
  Apple 
  trees 
  in 
  the 
  vicinity 
  should 
  be 
  kept 
  free 
  

   from 
  twig 
  infestation. 
  Should 
  the 
  nursery 
  become 
  infested, 
  it 
  is 
  best 
  

   to 
  dig 
  up 
  and 
  destroy 
  everything 
  that 
  has 
  been 
  attacked, 
  as 
  the 
  wingless 
  

   forms 
  may 
  spread 
  along 
  the 
  nursery 
  rows. 
  Though 
  this 
  is 
  not 
  the 
  

   case 
  in 
  California, 
  there 
  are 
  places 
  where 
  treatment 
  is 
  justifiable. 
  

   The 
  simplest 
  and 
  generally 
  cheapest 
  method 
  is 
  the 
  direct 
  application 
  

   of 
  kerosene 
  or 
  gasolene 
  with 
  a 
  swab 
  or 
  brush. 
  Too 
  much 
  oil 
  will 
  pro- 
  

   duce 
  dead 
  spots 
  on 
  the 
  bark. 
  The 
  work 
  is 
  as 
  quick 
  as 
  spraying, 
  and 
  

   is 
  immediately 
  and 
  completely 
  effectual. 
  The 
  trees 
  should 
  be 
  gone 
  

   over 
  about 
  once 
  a 
  week 
  in 
  spring 
  until 
  the 
  danger 
  of 
  rapid 
  increase 
  is 
  

   past. 
  If 
  the 
  insects 
  cannot 
  be 
  economically 
  treated 
  with 
  oil, 
  spraying 
  

   will 
  be 
  necessary, 
  and 
  a 
  nicotin 
  spray 
  is 
  the 
  best. 
  Nicotin 
  sulphate 
  

   40%, 
  1 
  lb., 
  and 
  cresol 
  soap 
  1 
  gallon, 
  in 
  200 
  gallons 
  of 
  water, 
  form 
  an 
  

   effective 
  solution 
  ; 
  the 
  soap 
  simply 
  increases 
  the 
  penetration. 
  Spray- 
  

   ing 
  must 
  be 
  thoroughly 
  done. 
  There 
  appears 
  to 
  be 
  no 
  danger 
  of 
  winged 
  

   forms 
  issuing 
  from 
  the 
  roots, 
  but 
  sometimes 
  it 
  may 
  be 
  desirable 
  to 
  

   prevent 
  the 
  lice 
  from 
  migrating. 
  The 
  easiest 
  method 
  is 
  to 
  dig 
  out 
  a- 
  

   Jew 
  shovelsful 
  of 
  earth 
  round 
  the 
  roots 
  and 
  fill 
  in 
  with 
  sand. 
  

  

  Paeker 
  (J. 
  R.). 
  The 
  imported 
  cabbage 
  worm 
  and 
  the 
  cabbage 
  aphis. 
  

  

  — 
  Montana 
  Agric. 
  Coll. 
  Expt. 
  Stn., 
  Bozeman, 
  Montana, 
  Circ. 
  no. 
  

   28, 
  Aug. 
  1913, 
  pp. 
  9-24, 
  12 
  figs. 
  

  

  The 
  cabbage 
  heads 
  are 
  rendered 
  unsightly 
  and 
  unfit 
  for 
  a 
  first-class 
  

   market 
  by 
  the 
  dark 
  green 
  excrement 
  of 
  the 
  " 
  imported 
  cabbage 
  

   worm 
  " 
  {Pieris 
  rapae, 
  L.), 
  and 
  if 
  they 
  are 
  badly 
  riddled, 
  growth 
  is 
  

   stopped. 
  It 
  is 
  well 
  to 
  plough 
  under 
  or 
  otherwise 
  destroy 
  all 
  cabbage 
  

   stumps 
  and 
  leaves 
  remaining 
  from 
  the 
  crop, 
  as 
  they 
  afford 
  ideal 
  

   breeding 
  places. 
  A 
  few 
  heavily-poisoned 
  stumps 
  may 
  be 
  left 
  to 
  act 
  

   as 
  traps. 
  A 
  spray, 
  containing 
  either 
  Paris 
  green, 
  arsenate 
  of 
  lead 
  or 
  

   arsenite 
  of 
  zinc, 
  may 
  be 
  used 
  immediately 
  there 
  is 
  any 
  noticeable 
  

   injury. 
  The 
  author 
  says 
  that 
  there 
  is 
  no 
  danger 
  in 
  eating 
  cabbage 
  

  

  