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   MOKRZECKI 
  (S. 
  A.). 
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  HactKOMblfl 
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  60Jlt3HM 
  pacTeHJM, 
  

  

  Ha6nK)AaBiui5iCfl 
  s-b 
  TaepMHecKoii 
  ry5epH'm 
  e-b 
  TeneHie 
  1913 
  roAa. 
  

  

  [The 
  injurious 
  insects 
  and 
  diseases 
  of 
  plants 
  noticed 
  in 
  the 
  Govt. 
  

   of 
  Taurida 
  during 
  1913.]— 
  « 
  OlHeTTj 
  fltfliejlbHOCTM 
  fyOepHCKaro 
  

   3HTOMonora 
  TaepimecKaro 
  SeiwcTea 
  sa 
  1913 
  rofl-b. 
  [Report 
  of 
  

   the 
  Chief 
  Entomologist 
  to 
  the 
  Zemstvo 
  of 
  the 
  Govt, 
  of 
  Taurida 
  for 
  

   1913], 
  Simferopol, 
  xxi, 
  1914, 
  13 
  pp. 
  

  

  The 
  author 
  deals 
  only 
  with 
  certain 
  points 
  of 
  importance 
  regarding 
  

   the 
  insect 
  pests 
  noticed 
  during 
  the 
  year 
  under 
  report, 
  more 
  detailed 
  

   information 
  being 
  contained 
  in 
  the 
  report 
  of 
  his 
  assistant. 
  He 
  deals 
  

   first 
  with 
  Brachycolus 
  noxius, 
  Mordw., 
  which 
  did 
  enormous 
  damage 
  

   in 
  1912, 
  decreasing 
  the 
  harvest 
  in 
  the 
  area 
  infested 
  by 
  75 
  per 
  cent. 
  

   The 
  author 
  suggested 
  ploughing 
  the 
  soil 
  carefully 
  for 
  winter-sown 
  

   crops 
  and 
  sowing 
  them 
  as 
  late 
  in 
  the 
  season 
  as 
  possible 
  ; 
  in 
  all 
  places 
  

   where 
  these 
  remedies 
  were 
  acted 
  upon, 
  the 
  state 
  of 
  the 
  crops 
  in 
  the 
  

   spring 
  of 
  1913 
  was 
  very 
  good. 
  However 
  in 
  April 
  1913, 
  the 
  aphids 
  

   appeared 
  on 
  trap 
  crops 
  of 
  winter-sown 
  wheat, 
  which, 
  in 
  the 
  form 
  of 
  a 
  

   7 
  ft. 
  wide 
  strip, 
  surrounded 
  a 
  field 
  of 
  918 
  acres 
  ; 
  these 
  trap 
  strips 
  were 
  

   sown 
  early, 
  at 
  the 
  end 
  of 
  the 
  preceding 
  summer, 
  as 
  a 
  protection 
  against 
  

   Mayetiola 
  (Cecidomyia) 
  destructor 
  and 
  owing 
  to 
  their 
  specific 
  purpose 
  

   could 
  not 
  have 
  been 
  reploughed 
  ; 
  the 
  sowing 
  on 
  the 
  field 
  inside 
  this 
  

   strip 
  was 
  carried 
  out 
  later. 
  The 
  author 
  found 
  that 
  colonies 
  of 
  lice 
  

   existed 
  only 
  on 
  the 
  trap 
  strips, 
  while 
  the 
  crops 
  on 
  the 
  field 
  were 
  free 
  

   from 
  them 
  ; 
  he 
  recommended 
  mowing 
  the 
  trap 
  crops 
  and 
  re-ploughing 
  

   the 
  land, 
  and 
  after 
  this 
  had 
  been 
  done 
  no 
  more 
  hce 
  were 
  noticed. 
  

   Some 
  time 
  later 
  colonies 
  of 
  hce 
  appeared 
  also 
  on 
  some 
  other 
  plots 
  of 
  a 
  

   total 
  area 
  of 
  378 
  acres, 
  which 
  had 
  to 
  be 
  reploughed, 
  the 
  District 
  

   Zemstvo 
  compensating 
  the 
  owners 
  at 
  a 
  rate 
  of 
  7s. 
  6d. 
  per 
  acre. 
  

  

  Examination 
  of 
  the 
  plants 
  at 
  this 
  season 
  resulted 
  in 
  the 
  discovery, 
  

   in 
  the 
  central 
  shoot 
  of 
  the 
  grain, 
  of 
  colonies 
  of 
  hce 
  consisting 
  of 
  one 
  

   adult 
  and 
  up 
  to 
  a 
  dozen 
  young 
  larvae 
  ; 
  the 
  first 
  nymph 
  was 
  noticed 
  

   on 
  the 
  1st 
  May. 
  Some 
  syrphid 
  larvae 
  were 
  also 
  found 
  in 
  each 
  colony 
  

   attacking 
  the 
  hce. 
  This 
  led 
  the 
  author 
  to 
  consider 
  that 
  winter-sown 
  

   wheat 
  would 
  not 
  be 
  injured 
  by 
  the 
  pest, 
  but 
  that 
  barley 
  and 
  oats 
  

   might 
  be 
  damaged 
  ; 
  the 
  result 
  confirmed 
  this 
  view 
  and 
  only 
  after 
  

   the 
  second 
  half 
  of 
  the 
  simimer 
  did 
  the 
  number 
  of 
  hce 
  increase 
  and 
  

   some 
  sporadic 
  damage 
  occur. 
  Special 
  investigations 
  on 
  Brachycolus 
  

   were 
  conducted 
  during 
  this 
  summer 
  by 
  N. 
  A. 
  Grossheim, 
  particularly 
  

   in 
  respect 
  of 
  their 
  parasites, 
  oviposition 
  of 
  winter 
  eggs, 
  etc., 
  and 
  a 
  

   report 
  on 
  these 
  investigations 
  wdll 
  be 
  issued. 
  The 
  author 
  points 
  out 
  

   that 
  Brachycolus 
  noxius 
  lays 
  its 
  winter 
  eggs 
  on 
  the 
  germinating 
  shoots 
  

   of 
  fallen 
  grain 
  and 
  recommends 
  the 
  careful 
  removal 
  of 
  all 
  such 
  grain. 
  

   He 
  mentions 
  that 
  the 
  District 
  Zemstvo 
  of 
  Eupatoria 
  has 
  decided 
  to 
  

   appoint 
  a 
  district 
  entomologist, 
  principally 
  to 
  study 
  and 
  deal 
  with 
  this 
  

   pest. 
  Crops 
  of 
  winter-sown 
  wheat 
  in 
  the 
  same 
  district 
  were 
  also 
  

   damaged 
  by 
  some 
  small 
  velvet 
  black 
  mites 
  with 
  yellow 
  legs, 
  the 
  

   identity 
  of 
  which 
  has 
  not 
  yet 
  been 
  established 
  ; 
  these 
  mites 
  suck 
  the 
  

   lower 
  leaves 
  of 
  the 
  seedlings 
  causing 
  them 
  to 
  wither 
  ; 
  they 
  are 
  to 
  be 
  

   found 
  in 
  groups 
  on 
  the 
  axils 
  of 
  the 
  leaves 
  and 
  are 
  very 
  easily 
  disturbed. 
  

  

  The 
  next 
  pest 
  dealt 
  with 
  is 
  Lymantria 
  dispar. 
  The 
  author 
  refers 
  

   to 
  his 
  observations 
  regarding 
  this 
  pest 
  in 
  his 
  last 
  year's 
  report 
  [see 
  

   this 
  Review, 
  Ser. 
  A, 
  i, 
  p. 
  361-364] 
  and 
  to 
  the 
  remedies 
  there 
  suggested. 
  

  

  