﻿508 
  

  

  The 
  degree 
  of 
  efficiency 
  of 
  this 
  Braconid 
  in 
  controUing 
  Farias 
  is 
  

   uncertain 
  ; 
  in 
  1911, 
  at 
  Bahtin, 
  it 
  was 
  found 
  that 
  44 
  per 
  cent, 
  of 
  the 
  

   boll 
  worms 
  were 
  destroyed. 
  It 
  is 
  thought 
  that, 
  although 
  a 
  very 
  useful 
  

   asset 
  in 
  keeping 
  the 
  boll 
  worm 
  in 
  check, 
  the 
  Braconid 
  cannot 
  perform 
  

   the 
  entire 
  work 
  of 
  control. 
  

  

  WiLLcocKs 
  (F. 
  C). 
  An 
  Acarine 
  Parasite 
  of 
  the 
  Pink 
  Boll 
  Worm. 
  — 
  

   Bull. 
  Soc. 
  Entom. 
  d'Egypte, 
  Cairo, 
  April-June 
  1913, 
  no. 
  2. 
  1914, 
  

   pp. 
  68-72. 
  

  

  The 
  pink 
  boll 
  worm 
  is 
  the 
  larva 
  of 
  a 
  small 
  Tineid 
  moth, 
  Gelechia 
  

   gossyjpiella 
  ; 
  it 
  has 
  been 
  recorded 
  as 
  attacking 
  cotton 
  in 
  various 
  parts 
  

   of 
  Egypt, 
  and 
  has 
  become 
  a 
  serious 
  pest 
  during 
  the 
  past 
  few 
  years. 
  

   Recently 
  the 
  predaceous 
  acarine, 
  Pediculoides 
  ventricosus, 
  has 
  been 
  

   found 
  to 
  be 
  quite 
  common 
  on 
  pink 
  boll 
  worms 
  infesting 
  a 
  sample 
  of 
  

   cotton 
  seed 
  from 
  Behera 
  province. 
  At 
  first 
  it 
  was 
  thought 
  that 
  the 
  

   mite 
  might 
  be 
  an 
  important 
  enemy 
  of 
  G. 
  gossypiella, 
  but 
  is 
  now 
  doubtful 
  

   whether 
  this 
  is 
  the 
  case. 
  To 
  be 
  effective, 
  it 
  must 
  be 
  able 
  to 
  attack 
  the 
  

   pest 
  in 
  the 
  field, 
  but 
  its 
  powers 
  of 
  doing 
  this, 
  judging 
  by 
  its 
  effect 
  on 
  

   the 
  Mexican 
  boll 
  weevil 
  in 
  America, 
  are 
  likely 
  to 
  be 
  very 
  limited 
  ; 
  

   and 
  it 
  is 
  improbable 
  that 
  it 
  will 
  prove 
  an 
  important 
  enemy 
  of 
  the 
  pink 
  

   boll 
  worm 
  in 
  cotton 
  seed, 
  since 
  to 
  increase 
  rapidly 
  it 
  requires 
  a 
  fairly 
  

   high 
  temperature, 
  which 
  is 
  not 
  reached 
  until 
  all 
  the 
  seed 
  has 
  been 
  

   sown. 
  The 
  life-history 
  of 
  the 
  mite 
  is 
  as 
  follows 
  : 
  It 
  is 
  

   viviparous, 
  the 
  males 
  and 
  females 
  becoming 
  sexually 
  mature 
  within 
  

   the 
  body 
  of 
  the 
  parent 
  and 
  mating 
  soon 
  after 
  they 
  are 
  born 
  ; 
  under 
  

   favourable 
  conditions 
  there 
  may 
  be 
  a 
  generation 
  every 
  four 
  days. 
  

   The 
  attachment 
  of 
  the 
  young 
  mites 
  results 
  in 
  the 
  death 
  of 
  the 
  pink 
  

   boll 
  worm, 
  as 
  they 
  extract 
  all 
  its 
  fluid 
  contents. 
  

  

  These 
  mites 
  also 
  attack 
  man, 
  giving 
  rise 
  to 
  an 
  eruption 
  of 
  the 
  skin. 
  

  

  Barsacq 
  (T. 
  p.). 
  Destruction 
  of 
  Locusts 
  in 
  Turkestan. 
  — 
  Mthly. 
  BulL 
  

   Agric. 
  Intell. 
  Plant. 
  Dis., 
  Ro7ne, 
  v, 
  no. 
  4. 
  Apr. 
  1914, 
  pp. 
  558-564. 
  

  

  Turkestan 
  being 
  still 
  without 
  transit, 
  is 
  self-dependent 
  in 
  the 
  matter 
  

   of 
  cereals, 
  consequently 
  protection 
  from 
  the 
  attacks 
  of 
  locusts 
  is 
  most 
  

   necessary. 
  A 
  number 
  of 
  species 
  occur, 
  some 
  being 
  less 
  harmful 
  than 
  

   others. 
  The 
  Morocco 
  locust 
  (Stauronotus 
  maroccanus), 
  which 
  is 
  very 
  

   destructive, 
  deposits 
  its 
  eggs 
  on 
  arid 
  uncultivated 
  plains, 
  the 
  per- 
  

   manent 
  area 
  of 
  distribution 
  being 
  the 
  steppes 
  of 
  Samarkhand, 
  the 
  

   Khanat 
  of 
  Bokhara 
  and 
  Afghanistan. 
  Temporary 
  egg 
  deposition 
  

   centres 
  are 
  sometimes 
  found 
  in 
  Turkestan. 
  This 
  locust 
  has 
  been 
  

   found 
  to 
  select 
  altitudes 
  up 
  to 
  6,600 
  feet 
  above 
  sea-level 
  for 
  oviposition, 
  

   and 
  the 
  density 
  of 
  the 
  eggs 
  may 
  reach 
  10,000 
  clusters 
  per 
  square 
  yard, 
  

   the 
  whole 
  centre 
  occupying 
  some 
  hundreds 
  of 
  acres. 
  The 
  hatching 
  

   period 
  lasts 
  7-10 
  days, 
  usually 
  between 
  the 
  2nd 
  and 
  10th 
  of 
  April. 
  

   The 
  migratory 
  locust, 
  Locusta 
  (Pachytylus) 
  migratoria, 
  has 
  many 
  

   permanent 
  areas 
  of 
  distribution 
  in 
  Central 
  Asia, 
  such 
  as 
  reed-beds 
  on 
  

   banks 
  and 
  in 
  deltas 
  of 
  the 
  rivers. 
  Though 
  usually 
  preferring 
  the 
  shoots 
  

   of 
  reeds, 
  this 
  species, 
  perhaps 
  mixed 
  with 
  L. 
  danica, 
  is 
  reported 
  in 
  

   1896 
  as 
  having 
  damaged 
  75,000 
  acres 
  of 
  various 
  crops. 
  Recently 
  

   no 
  serious 
  damage 
  done 
  by 
  it 
  has 
  been 
  reported. 
  The 
  Italian 
  locust, 
  

   Caloptenus 
  italicus, 
  though 
  common 
  in 
  Turkestan, 
  has 
  only 
  recently 
  

  

  