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  The 
  thinnest 
  layer 
  gives 
  complete 
  protection. 
  If, 
  however, 
  the 
  tubers 
  

   are 
  already 
  damaged 
  the 
  larvae 
  will 
  hatch 
  out 
  and 
  work 
  their 
  way 
  to 
  

   the 
  surface 
  of 
  the 
  sand. 
  This 
  is 
  of 
  no 
  great 
  importance, 
  as 
  the 
  resulting 
  

   adults 
  will 
  not 
  be 
  able 
  to 
  cause 
  injury 
  and 
  the 
  loss 
  will 
  be 
  limited. 
  

   Boxes 
  in 
  which 
  the 
  tubers 
  are 
  stored 
  under 
  a 
  layer 
  of 
  sand 
  may 
  have 
  

   lioles 
  or 
  cracks 
  permitting 
  the 
  pest 
  to 
  enter, 
  so 
  that 
  it 
  is 
  better 
  to 
  lay 
  

   the 
  tubers 
  on 
  the 
  ground 
  and 
  cover 
  them. 
  Disinfection 
  of 
  the 
  premises 
  

   is 
  absolutely 
  necessary. 
  Collection 
  of 
  the 
  larvae 
  is 
  of 
  very 
  great 
  use 
  

   if 
  practised 
  in 
  spring 
  or 
  summer, 
  when 
  the 
  pest 
  is 
  not 
  numerous. 
  

   Stems 
  showing 
  bore 
  holes 
  should 
  be 
  collected 
  and 
  burned 
  before 
  

   the 
  larvae 
  have 
  time 
  to 
  escape. 
  Cultural 
  methods, 
  care 
  in 
  the 
  choice 
  

   of 
  clean 
  seed 
  and 
  the 
  destruction 
  of 
  all 
  wild 
  Solanaceae 
  capable 
  of 
  

   affording 
  food 
  are 
  very 
  necessary 
  measures. 
  A 
  bibliography 
  of 
  48 
  

   works 
  issued 
  up 
  to 
  1913 
  completes 
  this 
  paper. 
  

  

  Beauverie 
  (J.). 
  Etude 
  d'une 
  maladie 
  des 
  pechers 
  dans 
  la 
  valine 
  du 
  

   Rhdne. 
  [A 
  peach 
  disease 
  in 
  the 
  Ehone 
  valley.] 
  — 
  Ann. 
  du 
  Service 
  

   des 
  Epiphyties 
  (1912), 
  Paris, 
  1913, 
  pp. 
  186-195, 
  8 
  figs. 
  [Received 
  

   18th 
  Feb. 
  1914.] 
  

  

  The 
  Ambrosia 
  fungus 
  which 
  lines 
  the 
  galleries 
  made 
  by 
  Xyleborus 
  

   dispar 
  is 
  only 
  an 
  accompaniment 
  of 
  the 
  injury 
  which 
  is 
  due 
  to 
  the 
  

   insect 
  itself. 
  The 
  author 
  has 
  observed 
  cases 
  where 
  the 
  attack 
  has 
  

   proved 
  fatal 
  to 
  trees 
  of 
  small 
  diameter 
  in 
  the 
  Rhone 
  valley. 
  The 
  

   fungus 
  favours 
  the 
  development 
  of 
  the 
  beetle 
  by 
  extracting 
  from 
  the 
  

   wood 
  the 
  nutritious 
  matter 
  contained 
  in 
  it, 
  but 
  could 
  not, 
  by 
  itself, 
  

   injure 
  the 
  plant. 
  This 
  the 
  author 
  has 
  proved 
  by 
  inoculating 
  young 
  

   peach 
  trees 
  with 
  fungus, 
  the 
  results 
  being 
  always 
  negative. 
  The 
  trees 
  

   attacked 
  include 
  the 
  oak, 
  beech, 
  maple, 
  hornbeam, 
  alder, 
  ash, 
  plane, 
  

   chestnut 
  and 
  fruit 
  trees, 
  such 
  as 
  the 
  peach, 
  cherry, 
  pear 
  and 
  apricot. 
  

   The 
  insect 
  also 
  attacks 
  the 
  vine 
  and, 
  exceptionally, 
  conifers. 
  It 
  

   prefers 
  trees 
  which 
  are 
  drooping 
  or 
  have 
  been 
  felled, 
  but 
  where 
  such 
  

   are 
  lacking 
  it 
  attacks 
  healthy 
  individuals. 
  In 
  the 
  Rhone 
  valley, 
  only 
  

   trees 
  of 
  three 
  years 
  or 
  older 
  growth 
  are 
  injured. 
  

  

  As 
  a 
  preventive 
  measure 
  the 
  burning 
  of 
  all 
  old 
  wood 
  is 
  necessary. 
  

   Where 
  the 
  pest 
  has 
  actually 
  appeared, 
  all 
  infested 
  trees 
  must 
  be 
  burned 
  

   without 
  delay. 
  Besides 
  this, 
  plugging 
  the 
  entrance 
  holes, 
  or 
  painting 
  

   with 
  sodium 
  arsenate 
  or 
  with 
  a 
  mixture 
  of 
  lime, 
  lysol, 
  alcohol, 
  nicofcin 
  

   and 
  linseed 
  oil 
  may 
  be 
  tried, 
  but 
  these 
  methods 
  are 
  of 
  doubtful 
  efficacy. 
  

   Sticky 
  bands 
  or 
  trap 
  heaps 
  have 
  been 
  advised. 
  The 
  latter 
  are 
  very 
  

   useful 
  if 
  carefully 
  watched 
  and 
  their 
  contents 
  burned 
  at 
  the 
  proper 
  

   time. 
  Infested 
  trees 
  may 
  also 
  be 
  utilised 
  in 
  this 
  way. 
  An 
  important 
  

   prophylactic 
  measure 
  consists 
  in 
  rational 
  manuring, 
  whereby 
  the 
  trees 
  

   are 
  kept 
  in 
  a 
  flourishing 
  and 
  healthy 
  condition, 
  which 
  repels 
  the 
  

   pest. 
  

  

  Gastine 
  (Gt.). 
  La 
  lutte 
  contre 
  la 
  Diaspis 
  pentagona 
  en 
  Italie. 
  [Mul- 
  

   berry 
  scale 
  control 
  in 
  Italy.] 
  — 
  Ann. 
  du 
  Service 
  des 
  Epiphyties 
  

   (1912), 
  Paris, 
  1913, 
  pp. 
  196-219, 
  4 
  pis. 
  [Received 
  18th 
  Feb. 
  

   1914.] 
  

  

  Much 
  of 
  the 
  information 
  given 
  here 
  has 
  been 
  recorded 
  in 
  

   a 
  booklet 
  by 
  the 
  author 
  [see 
  this 
  Review, 
  Ser. 
  A, 
  ii, 
  p. 
  123]. 
  

   In 
  the 
  present 
  paper 
  instances 
  of 
  successful 
  control 
  of 
  Aulacaspis 
  

  

  