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  bacteria 
  which 
  are 
  harmful 
  in 
  agriculture, 
  is 
  given, 
  followed 
  by 
  detailed 
  

   descriptions 
  of 
  the 
  more 
  important 
  species. 
  The 
  following 
  insects 
  are 
  

   dealt 
  with 
  : 
  Aulacaspis 
  pentagona 
  imported 
  into 
  France 
  from 
  Italy 
  ; 
  

   I 
  eery 
  a 
  purchasi 
  in 
  the 
  Maritime 
  Alps 
  ; 
  Vanessa 
  cardui 
  and 
  Hydroecia 
  

   xanthenes 
  on 
  artichokes 
  ; 
  the 
  beetroot 
  Aphis 
  ; 
  and 
  Clysia 
  ambiguella 
  

   and 
  Polychrosis 
  botrana 
  on 
  vines. 
  Insect 
  parasites 
  and 
  insecticides 
  

   are 
  also 
  discussed. 
  

  

  Marchal 
  (P.). 
  La 
  Desinfection 
  des 
  Plantes 
  par 
  les 
  Fumigations 
  d'Acide 
  

   Cyanhydrique. 
  [Disinfecting 
  plants 
  by 
  fumigation 
  with 
  hydro- 
  

   cyanic 
  acid.]— 
  Lo 
  Vie 
  Agric. 
  et 
  Rur., 
  Paris, 
  iii, 
  no. 
  14, 
  7th 
  March 
  

   1914, 
  pp. 
  383-386. 
  

  

  This 
  article 
  gives 
  a 
  popular 
  account 
  of 
  the 
  methods 
  employed 
  in 
  using 
  

   hydrocyanic 
  acid 
  as 
  a 
  fumigating 
  gas 
  to 
  protect 
  shrubs 
  and 
  trees 
  in 
  

   the 
  field, 
  and 
  stored 
  grain 
  or 
  other 
  vegetable 
  products 
  from 
  the 
  attacks 
  

   of 
  insects. 
  The 
  account 
  is 
  based 
  on 
  the 
  methods 
  practised 
  on 
  a 
  large 
  

   scale 
  in 
  America, 
  and 
  details 
  are 
  given 
  of 
  the 
  apparatus 
  used 
  and 
  the 
  

   methods 
  of 
  its 
  manipulation. 
  (See 
  t\n.^ 
  Review, 
  Ser. 
  A, 
  ii, 
  pp. 
  103-104). 
  

  

  VuiLLET 
  (A.). 
  La 
  Lutte 
  contra 
  les 
  Ennemis 
  des 
  Plantes 
  par 
  les 
  Insectes 
  

   auxiliares. 
  [Combating 
  the 
  enemies 
  of 
  plants 
  by 
  means 
  of 
  useful 
  

   insects.] 
  — 
  La 
  Vie 
  Agric. 
  et 
  Rur., 
  Paris, 
  iii, 
  no. 
  14, 
  7th 
  March 
  1914, 
  

   pp. 
  387-389. 
  

  

  A 
  general 
  account 
  is 
  given 
  summarising 
  the 
  results 
  obtained 
  when 
  

   insects 
  have 
  been 
  employed 
  to 
  control 
  others 
  harmful 
  to 
  cultivated 
  

   plants 
  ; 
  a 
  detailed 
  account 
  is 
  given 
  of 
  Novius 
  cardinalis 
  and 
  its 
  use 
  

   against 
  Icerya 
  purchasi, 
  including 
  descriptions 
  of 
  how 
  it 
  may 
  be 
  reared 
  

   in 
  the 
  laboratory 
  and 
  distributed 
  in 
  the 
  field. 
  (See 
  this 
  Review, 
  

   Series 
  A, 
  ii, 
  p. 
  397). 
  

  

  PiCARD 
  (F.). 
  Les 
  Insectes 
  Nuisible 
  a 
  la 
  Betterave 
  dans 
  la 
  Midi 
  de 
  la 
  

   France. 
  [Insects 
  harmful 
  to 
  the 
  beetroot 
  in 
  the 
  South 
  of 
  France.] 
  

   — 
  La 
  Vie 
  Agric. 
  et 
  Rur., 
  Paris, 
  iii, 
  no. 
  14, 
  7th 
  March 
  1914, 
  

   pp. 
  390-391. 
  

  

  Beetroot 
  is 
  cultivated 
  in 
  large 
  quantities 
  in 
  the 
  south 
  of 
  France, 
  both 
  

   for 
  sugar 
  and 
  for 
  fodder, 
  though 
  to 
  a 
  less 
  extent 
  than 
  in 
  the 
  north. 
  It 
  is 
  

   subject 
  to 
  the 
  attacks 
  of 
  many 
  insect 
  enemies, 
  some 
  of 
  which 
  have 
  

   threatened 
  at 
  times 
  to 
  ruin 
  the 
  crops, 
  and 
  these 
  are 
  for 
  the 
  most 
  part 
  

   different 
  from 
  those 
  found 
  in 
  the 
  north. 
  

  

  The 
  beetroot 
  moth, 
  Phthorimaea 
  ocellatella, 
  lays 
  its 
  eggs 
  on 
  the 
  young 
  

   plants 
  in 
  the 
  spring, 
  the 
  larvae 
  boring 
  galleries 
  into 
  all 
  parts 
  of 
  the 
  

   plant 
  ; 
  the 
  number 
  of 
  generations 
  in 
  a 
  year 
  may 
  be 
  three, 
  four, 
  or 
  

   even 
  five 
  ; 
  the 
  damage 
  continues 
  even 
  after 
  the 
  crop 
  has 
  been 
  

   gathered. 
  The 
  upper 
  part 
  of 
  the 
  plant 
  should 
  be 
  cut 
  off 
  before 
  

   the 
  larvae 
  have 
  penetrated 
  into 
  the 
  root, 
  and 
  all 
  attacked 
  plants 
  

   given 
  to 
  cattle 
  as 
  fodder. 
  Stored 
  roots 
  should 
  be 
  kept 
  in 
  a 
  pit, 
  

   which 
  may, 
  if 
  necessary, 
  be 
  fumigated 
  with 
  carbon 
  bisulphide, 
  

   4J 
  oz. 
  to 
  the 
  cubic 
  yard. 
  Deep 
  ploughing 
  will 
  bury 
  the 
  pupae 
  

   that 
  may 
  remain 
  on 
  the 
  ground 
  after 
  the 
  harvest. 
  

  

  The 
  beetroot 
  fly 
  (Pegomyia 
  hyoscyami), 
  which 
  is 
  common 
  throughout 
  

   France, 
  attacks 
  the 
  leaves, 
  living 
  between 
  the 
  two 
  epidermal 
  layers. 
  

  

  