﻿37 
  

  

  and 
  they 
  have 
  not, 
  therefore, 
  caused 
  much 
  damage 
  to 
  sprouted 
  winter- 
  

   sown 
  crops. 
  Euxoa 
  segetum 
  was 
  chief 
  amongst 
  the 
  pests 
  noticed, 
  and 
  

   it 
  has 
  been 
  reported 
  from 
  nearly 
  all 
  the 
  Governments 
  outside 
  the 
  

   " 
  chornoisiom 
  " 
  area, 
  and 
  also 
  from 
  the 
  follow^ing 
  " 
  chornoisiom 
  " 
  

   Governments 
  : 
  — 
  Orel, 
  Riazan, 
  Tambov, 
  Voronezh, 
  Kiev, 
  Taurida, 
  

   Ekaterinoslav, 
  and 
  the 
  Province 
  of 
  Don. 
  Winter-sown 
  crops, 
  especi- 
  

   ally 
  the 
  early 
  ones, 
  were, 
  however, 
  seriously 
  injured 
  by 
  this 
  pest 
  in 
  

   Kazan, 
  Viatka, 
  Olonetz, 
  and 
  the 
  w-estern 
  parts 
  of 
  Perm, 
  and 
  in 
  some 
  

   localities 
  it 
  has 
  even 
  been 
  found 
  necessary 
  to 
  re-sow. 
  Elaterid 
  larvae 
  

   have 
  done 
  some 
  small 
  damage 
  in 
  Kiev, 
  Cherson, 
  Charkov, 
  Tchernigov, 
  

   Poltava 
  and 
  Vitebsk. 
  Mayetiola 
  (Cecidomyia) 
  destructor 
  has 
  been 
  

   reported 
  from 
  Kursk, 
  Orel, 
  Tambov, 
  Podolia, 
  Kiev, 
  Bessarabia, 
  

   Cherson, 
  Taurida, 
  Ekaterinoslav 
  and 
  Poltava 
  ; 
  while 
  the 
  presence 
  of 
  

   Oscinis 
  frit 
  has 
  been 
  noticed 
  in 
  Kursk 
  and 
  Charkov. 
  In 
  Tula 
  and 
  in 
  

   the 
  Vistula 
  Governments 
  the 
  crops 
  were 
  damaged 
  by 
  larvae 
  of 
  

   Melolontha. 
  

  

  As 
  to 
  Asiatic 
  Russia, 
  Euxoa 
  segetum 
  and 
  Elaterid 
  larvae 
  were 
  

   reported 
  from 
  various 
  parts 
  of 
  Tobolsk, 
  Tomsk 
  and 
  Enisseisk, 
  and 
  in 
  

   the 
  steppe 
  provinces 
  of 
  Akmolinsk, 
  Semipalatinsk 
  and 
  Turgai, 
  although 
  

   the 
  damage 
  done 
  by 
  them 
  was 
  very 
  small 
  and 
  hmited 
  to 
  a 
  few 
  localities 
  

   only. 
  In 
  Tobolsk, 
  Haltica 
  and 
  Phyllotreta 
  were 
  found, 
  while 
  from 
  

   Enisseisk 
  and 
  the 
  province 
  of 
  Akmolinsk 
  M. 
  destructor 
  was 
  reported. 
  

   Egg-clusters 
  of 
  locusts 
  were 
  deposited 
  in 
  large 
  numbers 
  in 
  Tobolsk 
  

   and 
  Akmolinsk. 
  All 
  these 
  pests 
  have 
  done, 
  however, 
  very 
  little 
  damage, 
  

   and 
  disappeared 
  with 
  the 
  early 
  rains. 
  

  

  SijAzov 
  (M.). 
  HanOonte 
  AeiueBbm 
  m 
  CMJibHOfltMCTByroiMiw 
  MHceKT- 
  

   MCMflij 
  flnfl 
  yHMHTOweHifl 
  capaHneBbix-b 
  HacbKOMbixij. 
  [The 
  cheapest 
  

   and 
  most 
  effective 
  insecticide 
  for 
  the 
  destruction 
  of 
  locust 
  pests.] 
  

   — 
  « 
  TypKeCTaHCKOe 
  CeJlbCKOe 
  X03flMCTB0» 
  ["Agriculture 
  of 
  

   Turkestan,''] 
  Tashkent, 
  no. 
  1, 
  Jan. 
  1913, 
  pp. 
  30-35, 
  

  

  The 
  author 
  points 
  out 
  the 
  advantages 
  of 
  sodium 
  arsenite 
  as 
  com- 
  

   pared 
  with 
  the 
  insecticide 
  usually 
  apphed 
  in 
  Turkestan, 
  viz., 
  Paris 
  

   green 
  with 
  lime. 
  The 
  former 
  dissolves 
  easily 
  in 
  water, 
  giving 
  a 
  solu- 
  

   tion 
  which 
  does 
  not 
  choke 
  the 
  sprayer 
  ; 
  it 
  withstands 
  the 
  influence 
  of 
  

   even 
  heavy 
  rains, 
  when 
  mixed 
  simply 
  w^ith 
  milk 
  of 
  Ume 
  and 
  not 
  with 
  

   molasses 
  or 
  treacle, 
  sticking 
  firmly 
  to 
  the 
  plants, 
  and 
  not 
  requiring 
  

   repeated 
  sprapngs 
  ; 
  and 
  under 
  equal 
  conditions 
  and 
  in 
  equal 
  doses 
  

   it 
  proves 
  twice 
  as 
  rapid 
  in 
  its 
  effects 
  as 
  Paris 
  green. 
  He 
  also 
  states 
  that 
  

   whereas 
  Paris 
  green 
  contains 
  only 
  24*3 
  per 
  cent, 
  of 
  metallic 
  arsenic 
  

   (not 
  arsenic 
  acid), 
  sodium 
  arsenite 
  contains 
  45 
  '2 
  per 
  cent. 
  The 
  author 
  

   further 
  deals 
  with 
  the 
  prices 
  of 
  this 
  chemical 
  and 
  the 
  duties 
  on 
  it 
  in 
  

   Russia, 
  and 
  gives 
  a 
  comparative 
  table 
  show^ing 
  the 
  amount 
  and 
  cost 
  

   of 
  both 
  insecticides 
  necessary 
  for 
  one 
  dessiatin 
  (2 
  "7 
  acres) 
  in 
  Turke- 
  

   stan. 
  From 
  this 
  it 
  appears 
  that 
  w^hen 
  using 
  sodium 
  arsenite 
  it 
  is 
  

   possible 
  to 
  obtain 
  a 
  saving 
  of 
  from 
  30 
  to 
  60 
  kopecks 
  (7|d. 
  to 
  1/3) 
  per 
  

   dessiatin 
  ; 
  taking 
  into 
  consideration 
  that 
  in 
  Turkestin 
  the 
  campaign 
  

   against 
  locusts 
  is 
  distributed 
  over 
  large 
  areas 
  — 
  50,000-60,000 
  

   dessiatins 
  (162,000 
  acres) 
  — 
  this 
  would 
  result 
  in 
  a 
  saving 
  of 
  about 
  

   10,000 
  rubles 
  (£2,000). 
  

  

  The 
  author 
  points 
  out 
  that 
  sodium 
  arsenite, 
  like 
  Paris 
  green, 
  may 
  

  

  