﻿266 
  

  

  the 
  plants 
  were 
  injured 
  by 
  the 
  larvae. 
  The 
  author 
  is 
  not 
  inchned 
  to 
  

   explain 
  this 
  as 
  due 
  to 
  the 
  influence 
  of 
  tlie 
  formalin 
  alone. 
  

  

  Experiments 
  conducted 
  in 
  the 
  laboratory 
  on 
  the 
  food 
  of 
  the 
  larvae 
  

   showed 
  that 
  they 
  preferred 
  cucumbers, 
  beetroots 
  and 
  carrots 
  ; 
  the 
  

   next 
  place 
  being 
  taken 
  by 
  potatoes, 
  while 
  they 
  ate 
  turnips 
  very 
  

   unwillingly 
  and 
  did 
  not 
  touch 
  radish. 
  CannibaUsm 
  Avas 
  also 
  observed. 
  

  

  Euxoa 
  segetum 
  was 
  present 
  in 
  the 
  government, 
  but 
  not 
  to 
  a 
  serious 
  

   extent. 
  The 
  following 
  species 
  are 
  also 
  recorded 
  : 
  Feltia 
  (Agrotis) 
  

   exdamationis, 
  L., 
  Ochsenhemieria 
  taurella, 
  SchifE., 
  an 
  unidentified 
  

   species 
  of 
  Thrips, 
  Siphonophora 
  cerealis, 
  Kalt., 
  Phyllotreta 
  vittula, 
  

   Eedt., 
  and 
  Athous 
  niger, 
  L. 
  

  

  DiNDON 
  (P.). 
  Kl 
  6opb6t 
  CTj 
  KanyCTHOM 
  myxoM. 
  [On 
  the 
  fight 
  against 
  

   Chortophila 
  {Anthomyia) 
  brassicae.] 
  — 
  « 
  CaflOBOfl"b 
  » 
  [The 
  Horticul- 
  

   turist], 
  Rostov-on-Don, 
  no. 
  2, 
  Feb. 
  1914, 
  pp. 
  111-113, 
  2 
  figs. 
  

  

  The 
  author 
  gives 
  some 
  information 
  as 
  to 
  the 
  life-history 
  of 
  this 
  

   fly. 
  The 
  larvae 
  attack 
  the 
  young 
  stalk 
  and 
  collar 
  of 
  cabbages, 
  causing 
  

   the 
  plants 
  to 
  fall 
  over. 
  The 
  imago 
  appears 
  early 
  in 
  spring 
  and 
  

   oviposits 
  on 
  the 
  stalks 
  of 
  the 
  plants, 
  near 
  the 
  earth, 
  the 
  eggs 
  hatching 
  in 
  

   about 
  ten 
  days. 
  The 
  larvae 
  pupate 
  in 
  the 
  earth 
  and 
  produce 
  a 
  second 
  

   generation 
  in 
  Jmie-July. 
  The 
  duration 
  of 
  the 
  whole 
  development 
  

   of 
  the 
  insect 
  is 
  about 
  1 
  J-2 
  months, 
  so 
  that 
  they 
  can 
  produce 
  two 
  to 
  three 
  

   generations 
  during 
  one 
  summer. 
  The 
  females 
  prefer 
  to 
  oviposit 
  on 
  

   dung, 
  so 
  that 
  plants 
  manured 
  with 
  poudrette 
  or 
  fresh 
  dung 
  or 
  similar 
  

   manure 
  are 
  more 
  liable 
  to 
  attack, 
  while 
  the 
  damage 
  done 
  by 
  the 
  pests 
  

   is 
  less 
  in 
  fields 
  manured 
  with 
  compost 
  or 
  some 
  other 
  artificial 
  manure. 
  

   The 
  most 
  radical 
  remedy 
  is 
  to 
  take 
  out 
  the 
  injured 
  plants 
  and 
  to 
  

   destroy 
  them, 
  together 
  with 
  the 
  larvae, 
  by 
  burning. 
  As 
  a 
  preventive 
  

   measure 
  the 
  author 
  suggests 
  spraying 
  the 
  plants 
  with 
  milk 
  of 
  lime 
  

   (1-2 
  lb. 
  lime 
  in 
  about 
  2 
  '7 
  gallons 
  of 
  water), 
  but 
  this 
  remedy 
  is 
  effective 
  

   only 
  for 
  a 
  short 
  time. 
  Good 
  results 
  can 
  also 
  be 
  obtained 
  by 
  rubbing 
  

   the 
  collar 
  of 
  the 
  plants 
  between 
  the 
  fingers, 
  which 
  operation 
  prevents 
  

   the 
  hatching 
  out 
  of 
  the 
  larvae, 
  this 
  must 
  be 
  repeated 
  every 
  ten 
  days 
  

   and 
  at 
  the 
  same 
  time 
  the 
  earth 
  round 
  the 
  plants 
  must 
  be 
  sprayed 
  with 
  

   milk 
  of 
  lime 
  or 
  simply 
  with 
  dry 
  lime 
  (about 
  1 
  cwt. 
  to 
  the 
  acre). 
  The 
  

   author 
  records 
  the 
  results 
  of 
  the 
  following 
  method 
  applied 
  to 
  two 
  fields 
  

   of 
  cabbage 
  during 
  last 
  year. 
  Both 
  fields 
  were 
  manured 
  only 
  with 
  

   mineral 
  manure, 
  such 
  as 
  basic 
  slag, 
  potash, 
  etc., 
  besides 
  having 
  been 
  

   limed 
  in 
  the 
  previous 
  autumn. 
  The 
  first 
  field 
  was 
  also 
  twice 
  reploughed 
  

   during 
  the 
  autumn 
  and 
  twice 
  harrowed 
  in 
  the 
  following 
  spring. 
  The 
  

   second 
  field 
  w^as 
  only 
  once 
  reploughed 
  in 
  autumn. 
  The 
  rubbing 
  of 
  

   the 
  stalks 
  w^as 
  only 
  once 
  undertaken 
  and 
  no 
  liming 
  was 
  applied 
  after- 
  

   wards. 
  The 
  results 
  were 
  that 
  on 
  the 
  first 
  field 
  only 
  5-8 
  per 
  cent, 
  of 
  

   the 
  plants 
  fell 
  out, 
  whilst 
  on 
  the 
  second 
  one 
  this 
  figure 
  reached 
  20 
  per 
  

   cent. 
  

  

  Stcherbakov 
  (Th.). 
  SawtiKM 
  no 
  (jiayHt 
  yxoeepTOKij, 
  tpmrcobtj 
  m 
  

  

  ctTHaiOKpbmblXTj 
  PoCCiMCKOM 
  MlVinepiM. 
  [Notes 
  on 
  the 
  Derm- 
  

   aptera, 
  Thysanoptera 
  and 
  Neuroptera 
  of 
  the 
  Kussian 
  Empire.] 
  — 
  

   Revue 
  Russe 
  d'Entomologie, 
  St. 
  Petersburg, 
  xiii, 
  no. 
  3-4, 
  1913, 
  

   pp. 
  461-466. 
  

  

  The 
  following 
  species 
  of 
  Thysanoptera 
  are 
  recorded 
  by 
  the 
  author. 
  

  

  