﻿200 
  

  

  (3) 
  Experiments 
  against 
  the 
  larvae 
  of 
  Meloloniha 
  with 
  \ 
  per 
  cent, 
  

   and 
  1 
  per 
  cent, 
  of 
  Schweinfurt 
  green 
  sprayed 
  on 
  the 
  roots 
  of 
  trees 
  have 
  

   failed, 
  in 
  nature 
  as 
  well 
  as 
  in 
  the 
  laboratory, 
  as 
  the 
  insecticide 
  did 
  not 
  

   affect 
  the 
  larvae, 
  but 
  injured 
  the 
  trees, 
  causing 
  the 
  leaves 
  to 
  fall 
  off. 
  

  

  Heyflana 
  CTj 
  niluetAOMTj 
  nJIOAOWOpKM. 
  [Failure 
  with 
  the 
  parasite 
  

   (Pentarthron 
  semhlidis) 
  of 
  Cydia 
  'pomonella.'] 
  — 
  «TypKeCTaHCKOe 
  

   CeJIbCKOe 
  X03flMCTB0» 
  ['' 
  Agriculture 
  of 
  Turkestan 
  ''^^ 
  Tashkent, 
  

   Dec. 
  1913, 
  pp. 
  1198-1200. 
  

  

  An 
  editorial 
  note 
  records 
  a 
  serious 
  outbreak 
  of 
  Cydia 
  (Carpocapsa) 
  

   pomonella 
  in 
  the 
  orchards 
  of 
  Tashkent 
  in 
  1913 
  and 
  the 
  apparent 
  

   failure 
  to 
  obtain 
  the 
  favourable 
  results 
  which 
  have 
  been 
  expected 
  

   from 
  the 
  parasites 
  of 
  the 
  eggs 
  of 
  this 
  pest 
  imported 
  from 
  Astrachan. 
  

   A 
  case 
  of 
  one 
  orchard 
  is 
  mentioned 
  in 
  which 
  a 
  small 
  number 
  of 
  the 
  

   parasites 
  were 
  released 
  in 
  September 
  1911 
  ; 
  they 
  hibernated 
  in 
  good 
  

   condition, 
  but 
  developed 
  in 
  great 
  numbers 
  only 
  at 
  the 
  end 
  of 
  the 
  next 
  

   summer, 
  evidently 
  having 
  required 
  the 
  first 
  half 
  of 
  the 
  summer 
  for 
  

   multiplication. 
  In 
  the 
  autumn 
  of 
  1912 
  there 
  was 
  not 
  a 
  single 
  apple 
  

   in 
  this 
  orchard 
  which 
  was 
  not 
  infested 
  by 
  C. 
  pomonella. 
  Owing 
  to 
  

   the 
  great 
  number 
  of 
  parasites 
  which 
  were 
  noticed 
  at 
  the 
  end 
  of 
  that 
  

   summer, 
  it 
  was 
  expected 
  that 
  the 
  number 
  of 
  hibernating 
  specimens 
  

   would 
  be 
  greater 
  and 
  that 
  the 
  latter 
  would 
  develop 
  and 
  prove 
  more 
  

   useful 
  in 
  1913 
  ; 
  but 
  it 
  appeared 
  that 
  the 
  number 
  of 
  parasites 
  in 
  1913 
  

   was 
  very 
  small, 
  while 
  the 
  numbers 
  of 
  C. 
  pomonella 
  were 
  enormous. 
  

   The 
  writer 
  of 
  the 
  article 
  is 
  at 
  a 
  loss 
  to 
  explain 
  the 
  reason 
  for 
  this 
  failure 
  

   and 
  suggests 
  that 
  either 
  the 
  parasites 
  themselves 
  destroyed 
  last 
  

   summer 
  all 
  the 
  eggs 
  in 
  which 
  they 
  could 
  have 
  wintered, 
  or 
  that 
  they 
  

   have 
  been 
  removed 
  from 
  the 
  orchard 
  with 
  the 
  harvest 
  of 
  apples. 
  

   In 
  view 
  of 
  the 
  serious 
  injury 
  done 
  to 
  the 
  orchards 
  of 
  Tashkent 
  by 
  the 
  

   pest 
  and 
  to 
  the 
  failure 
  or 
  cost 
  of 
  other 
  remedies, 
  it 
  is 
  suggested 
  that 
  

   evidently 
  the 
  parasites 
  must 
  be 
  bred 
  artificially 
  in 
  the 
  laboratory 
  of 
  

   the 
  Entomological 
  Station 
  and 
  let 
  loose 
  in 
  the 
  orchards 
  early 
  in 
  spring. 
  

  

  A 
  Suggestion 
  for 
  trapping 
  Pachydissus 
  sartus. 
  — 
  « 
  TypKeCTaHCKoe 
  

   GenbCKOe 
  X03flMCTB0» 
  [^'Agriculture 
  of 
  Turkestan, 
  ^''l 
  Tashkent, 
  

   Dec. 
  1913, 
  pp. 
  1226-1228. 
  

  

  A 
  correspondent 
  suggests 
  as 
  a 
  remedy 
  against 
  the 
  Longicorn, 
  

   Pachydissus 
  sartus, 
  Sols., 
  the 
  use 
  of 
  trap 
  trees, 
  the 
  bark 
  on 
  some 
  parts 
  

   of 
  which 
  has 
  been 
  removed 
  to 
  expose 
  the 
  wood. 
  He 
  contends 
  that 
  

   such 
  trees 
  would 
  attract 
  the 
  beetles, 
  and 
  could 
  be 
  destroyed 
  as 
  soon 
  

   as 
  they 
  had 
  become 
  infested. 
  This 
  method 
  is 
  successfully 
  applied 
  

   against 
  various 
  Scolytidae. 
  In 
  a 
  reply, 
  V. 
  Plotnikov 
  does 
  not 
  

   approve 
  of 
  this 
  method 
  under 
  the 
  conditions 
  prevailing 
  in 
  Turkestan, 
  

   where 
  there 
  are 
  no 
  large 
  forests. 
  Besides 
  he 
  is 
  not 
  satisfied 
  as 
  to 
  the 
  

   suggested 
  method 
  of 
  preparing 
  the 
  trap 
  trees, 
  for 
  his 
  experience 
  has 
  

   proved 
  that 
  these 
  beetles 
  are 
  not 
  attracted 
  to 
  rings 
  on 
  trees 
  made 
  by 
  

   removing 
  the 
  bark 
  ; 
  and 
  even 
  if 
  the 
  trees 
  should 
  be 
  cut 
  down 
  and 
  left 
  

   lying, 
  he 
  doubts 
  \€hether 
  they 
  would 
  attract 
  the 
  insects 
  in 
  sufficiently 
  

   large 
  quantities. 
  Pending 
  further 
  investigations, 
  he 
  repeats 
  his 
  

   previous 
  recommendations, 
  i.e. 
  to 
  remove 
  and 
  burn 
  the 
  damaged 
  

   trees 
  before 
  the 
  spring 
  and 
  again 
  later 
  in 
  the 
  season. 
  

  

  