﻿16 
  

  

  Bakthou 
  (— 
  ,). 
  Les 
  Ennemis 
  du 
  Framboisier. 
  [Enemies 
  of 
  the 
  

   raspberry 
  cane.] 
  — 
  Moniteur 
  d' 
  Horticulture, 
  Paris, 
  xxxvii, 
  no. 
  21, 
  

   10th 
  Nov. 
  1913, 
  pp. 
  248-249. 
  . 
  

  

  The 
  stem 
  of 
  the 
  raspberry 
  is 
  frequently 
  attacked 
  by 
  the 
  daddy-long- 
  

   legs 
  {Tipula 
  oleracea). 
  The 
  larva, 
  known 
  as 
  the 
  leather 
  jacket, 
  devours 
  

   the 
  stem 
  not 
  only 
  of 
  raspberry 
  canes, 
  but 
  of 
  strawberries, 
  vegetables 
  

   and 
  flowers. 
  Carbon 
  bisulphide 
  may 
  be 
  used 
  as 
  a 
  remedy, 
  also 
  gas- 
  

   lime. 
  The 
  best 
  method 
  is 
  said 
  to 
  be 
  to 
  collect 
  the 
  larvae 
  in 
  the 
  neigh- 
  

   bourhood 
  of 
  the 
  plant. 
  This 
  should 
  be 
  done 
  in 
  the 
  early 
  morning 
  

   when 
  they 
  come 
  out 
  to 
  feed. 
  Spraying 
  with 
  water 
  and 
  gas-oil 
  emulsion 
  

   is 
  effectual, 
  but 
  it 
  has 
  the 
  disadvantage 
  of 
  destroying 
  the 
  leaves 
  of 
  the 
  

   plant. 
  

  

  Another 
  insect 
  attacking 
  the 
  raspberry 
  is 
  Lasioptera 
  obfuscata, 
  

   Macq., 
  which 
  produces 
  galls 
  on 
  the 
  stems, 
  full 
  of 
  reddish- 
  coloured 
  

   larvae. 
  The 
  remedy 
  is 
  to 
  cut 
  off 
  and 
  burn 
  the 
  excrescences. 
  The 
  

   leaves 
  are 
  often 
  attacked 
  by 
  the 
  caterpillars 
  of 
  Polia 
  oleracea, 
  L. 
  

   The 
  canes 
  should 
  be 
  sprayed 
  at 
  their 
  base 
  with 
  a 
  concentrated 
  solution 
  

   of 
  sulpho-carbonate 
  of 
  potassium 
  ; 
  a 
  trial 
  spray 
  must 
  be 
  made 
  first 
  

   to 
  ensure 
  that 
  the 
  concentration 
  is 
  not 
  such 
  as 
  to 
  harm 
  the 
  plant. 
  

  

  MoEEAu 
  (L.) 
  & 
  ViNET 
  (E.). 
  Au 
  sujet 
  de 
  remploi 
  des 
  pieges 
  a 
  vin 
  pour 
  

   capturer 
  les 
  papillons 
  de 
  la 
  Cochylis. 
  [On 
  the 
  use 
  of 
  wine-traps 
  for 
  

   capturing 
  Clysia 
  ambiguella.] 
  — 
  C. 
  R. 
  Acad. 
  Sci., 
  Paris, 
  clvii, 
  

   no. 
  23, 
  8th 
  Dec. 
  1913, 
  1158-1160. 
  

  

  The 
  traps 
  consist 
  of 
  simple 
  glasses, 
  8 
  cms. 
  (3 
  2 
  inches) 
  deep 
  and 
  

   6 
  cms. 
  (2*4 
  inches) 
  in 
  diameter 
  at 
  the 
  orifice. 
  They 
  are 
  provided 
  with 
  

   a 
  plate 
  of 
  glass 
  9 
  x 
  12 
  cms., 
  which 
  forms 
  a 
  roof, 
  and 
  which 
  is 
  held 
  above 
  

   by 
  a 
  piece 
  of 
  iron 
  wire, 
  which 
  serves 
  also 
  to 
  suspend 
  the 
  traps 
  between 
  

   the 
  vine 
  plants. 
  The 
  liquid 
  consists 
  of 
  wine 
  lees, 
  to 
  which 
  is 
  added 
  

   vinegar, 
  one 
  part 
  to 
  ten 
  of 
  wine. 
  The 
  glasses 
  are 
  three-quarters 
  filled. 
  

   The 
  capture 
  of 
  the 
  moths 
  of 
  Clysia 
  by 
  means 
  of 
  these 
  traps 
  is 
  influenced 
  

   by 
  atmospheric 
  conditions, 
  and 
  does 
  not 
  give, 
  according 
  to 
  the 
  writers, 
  

   satisfactory 
  results, 
  in 
  spite 
  of 
  the 
  numbers, 
  which 
  show 
  that 
  2,289 
  

   moths 
  were 
  caught 
  in 
  thirty-one 
  traps. 
  It 
  does 
  not 
  appear 
  to 
  

   constitute 
  a 
  sufl&cient 
  means 
  of 
  control, 
  and 
  can 
  only 
  be 
  regarded 
  as 
  

   complementary 
  to 
  other 
  methods. 
  

  

  Thompson 
  (W. 
  K.). 
  Sur 
  la 
  sp6cificite 
  des 
  Parasites 
  Entomophages. 
  

  

  [On 
  the 
  speciaHsed 
  habits 
  of 
  parasites 
  of 
  insects.] 
  — 
  C. 
  R. 
  hebd. 
  Soc. 
  

   Biol, 
  Paris, 
  Ixxv, 
  no. 
  35, 
  12th 
  Dec. 
  1913, 
  pp. 
  520-521. 
  

  

  The 
  operation 
  of 
  parasites 
  in 
  keeping 
  harmful 
  insects 
  under 
  control 
  

   has 
  been 
  a 
  considerable 
  asset 
  to 
  agriculturists 
  during 
  the 
  past 
  few 
  

   years. 
  There 
  is 
  a 
  tendency, 
  however, 
  to 
  attribute 
  to 
  particular 
  

   parasites 
  too 
  great 
  a 
  power 
  of 
  becoming 
  acclimatised 
  to 
  new 
  surround- 
  

   ings 
  into 
  which 
  they 
  have 
  been 
  artificially 
  introduced, 
  and 
  the 
  author 
  

   points 
  out 
  that 
  parasites 
  are 
  often 
  sharply 
  restricted 
  to 
  particular 
  

   hosts. 
  Also, 
  since 
  many 
  undergo 
  an 
  alternation 
  of 
  hosts, 
  the 
  intro- 
  

   duction 
  of 
  such 
  parasites 
  into 
  new 
  countries 
  becomes 
  still 
  more 
  

   complicated. 
  

  

  