﻿611 
  

  

  Situation 
  des 
  vignobles 
  au 
  ler 
  Juin. 
  [The 
  state 
  of 
  the 
  vineyards 
  on 
  

   the 
  1st 
  of 
  June.] 
  — 
  Pr 
  ogres 
  Agric. 
  Vitic, 
  Montpellier, 
  xxxi, 
  no. 
  25, 
  

   21st 
  June 
  1914, 
  pp. 
  775-779. 
  

  

  Pyrahd 
  larvae 
  were 
  numerous 
  in 
  the 
  Aude 
  and 
  both 
  Clysia 
  and 
  Poly- 
  

   chrosis 
  moths 
  were 
  noticed 
  in 
  numbers 
  there. 
  In 
  the 
  Cote-d'Or, 
  

   Haltica 
  appeared 
  in 
  large 
  numbers 
  at 
  the 
  time 
  growth 
  started, 
  but 
  

   seemed 
  to 
  be 
  less 
  namerous 
  in 
  the 
  old 
  centres 
  of 
  1912 
  and 
  1913, 
  this 
  

   being 
  probably 
  due 
  to 
  treatment 
  with 
  copper-arsenic 
  sprays. 
  In 
  

   Indre 
  Clysia 
  was 
  numerous, 
  and 
  also 
  a 
  source 
  of 
  anxiety 
  in 
  Loir-et- 
  

   Cher. 
  In 
  the 
  Pyrenees- 
  Orientales 
  Clysia 
  and 
  Polychrosis 
  were 
  

   abundant. 
  

  

  Chaure 
  (L.). 
  De 
  la 
  non-action 
  du 
  froid 
  sur 
  les 
  insectes. 
  [The 
  negative 
  

   action 
  of 
  cold 
  on 
  insects.] 
  — 
  Moniteur 
  cfHortic, 
  Paris, 
  xxxviii, 
  

   no. 
  12, 
  25th 
  June 
  1914, 
  p. 
  135. 
  

  

  In 
  October 
  and 
  November 
  1913 
  there 
  was 
  a 
  late 
  outbreak 
  of 
  Pieris 
  

   brassicae 
  in 
  the 
  department 
  of 
  Vienne. 
  Some 
  of 
  the 
  larvae 
  were 
  still 
  

   ahve 
  in 
  January 
  1914 
  and 
  many 
  chrysalids 
  were 
  attached 
  to 
  outside 
  

   walls 
  without 
  shelter. 
  Though 
  the 
  thermometer 
  reached 
  freezing 
  

   point 
  they 
  were 
  in 
  no 
  way 
  injuriously 
  afiected. 
  

  

  CoTTE 
  (J.). 
  Recherches 
  sur 
  la 
  resistance 
  desv§g§taux 
  verts 
  aux 
  fumiga- 
  

   tions 
  d'acide 
  cyanhydrique. 
  [Kesearches 
  on 
  the 
  resistance 
  of 
  green 
  

   plants 
  to 
  fumigation 
  with 
  hydrocyanic 
  acid.] 
  — 
  C. 
  R. 
  Soc. 
  Biol., 
  

   Paris, 
  Ixxvii, 
  no. 
  22, 
  26th 
  June 
  1914, 
  pp. 
  185-187. 
  

  

  The 
  author 
  finds 
  that 
  some 
  plants 
  possess 
  a 
  remarkable 
  power 
  of 
  

   resistance 
  to 
  hydrocyanic 
  acid 
  gas. 
  The 
  fumigating 
  chamber 
  used 
  

   in 
  his 
  experiments 
  measured 
  32 
  by 
  32 
  by 
  40 
  inches. 
  The 
  potassium 
  

   cyanide 
  contained 
  96*2 
  per 
  cent, 
  of 
  the 
  pure 
  salt, 
  producing 
  an 
  amount 
  

   of 
  gas 
  practically 
  equal 
  to 
  40 
  per 
  cent, 
  of 
  the 
  weight 
  of 
  the 
  cyanide. 
  

   The 
  apparatus 
  was 
  placed 
  in 
  a 
  cellar 
  of 
  which 
  the 
  temperature 
  was 
  

   practically 
  stationary 
  at 
  about 
  61° 
  Fahr. 
  and 
  never 
  exceeded 
  62°. 
  

   The 
  cyanide 
  was 
  placed 
  in 
  a 
  dish 
  containing 
  sulphuric 
  acid 
  diluted 
  to 
  

   one-quarter 
  strength. 
  The 
  author 
  describes 
  five 
  of 
  the 
  experiments 
  

   with 
  doses 
  of 
  cyanide 
  varpng 
  from 
  12'5 
  grammes 
  to 
  39'06 
  grammes 
  per 
  

   cubic 
  metre, 
  such 
  strengths 
  being 
  considerably 
  stronger 
  than 
  those 
  

   adopted 
  in 
  fumigation 
  practice. 
  Wheat 
  is 
  slightly 
  affected 
  by 
  a 
  12 
  

   gramme 
  dose, 
  and 
  is 
  killed 
  by 
  a 
  2-hours 
  exposure 
  in 
  an 
  atmosphere 
  

   containing 
  the 
  gas 
  from 
  39 
  grammes 
  of 
  cyanide. 
  The 
  castor-oil 
  plant 
  

   first 
  shows 
  lesions 
  at 
  a 
  15-gramme 
  dose 
  ; 
  23 
  grammes 
  are 
  a 
  sufficient 
  

   strength 
  to 
  kill 
  it 
  more 
  or 
  less 
  rapidly. 
  The 
  dwarf 
  nasturtium 
  resisted 
  

   a 
  dose 
  of 
  15*51 
  grammes 
  per 
  cubic 
  metre 
  for 
  2 
  hours, 
  but 
  this 
  seemed 
  

   to 
  be 
  nearly 
  a 
  fatal 
  dose. 
  

  

  DE 
  Charmoy 
  (D. 
  d'E.). 
  Report 
  on 
  a 
  visit 
  to 
  South 
  Africa. 
  — 
  Issued 
  by 
  

   the 
  Department 
  of 
  Agriculture, 
  Mauritius, 
  15th 
  May 
  1914, 
  12 
  pp. 
  

   [Received 
  27th 
  August 
  1914]. 
  

  

  This 
  is 
  a 
  detailed 
  report 
  on 
  the 
  visit 
  of 
  the 
  Mauritius 
  Government 
  

   Entomologist 
  to 
  South 
  Africa, 
  where, 
  from 
  November 
  1913 
  to 
  

   February 
  1914 
  he 
  studied 
  entomological 
  problems. 
  After 
  describing 
  

  

  (C7 
  6) 
  c2 
  

  

  