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  sugar-cane, 
  and 
  which 
  is 
  also 
  recorded 
  from 
  Porto 
  Rico 
  by 
  Stahl. 
  

   The 
  weevil 
  root-borer 
  (Diaprepes 
  spengleri, 
  L.), 
  which 
  in 
  the 
  larval 
  

   stage 
  attacks 
  the 
  roots 
  of 
  sugar-cane, 
  must 
  now 
  be 
  added 
  to 
  the 
  list 
  

   of 
  borers 
  afiecting 
  the 
  plant 
  in 
  Porto 
  Rico. 
  The 
  adult 
  weevil 
  has 
  

   already 
  been 
  recorded 
  as 
  an 
  enemy 
  of 
  citrus 
  trees, 
  and 
  as 
  common 
  in 
  

   coffee 
  plantations, 
  and 
  was 
  stated 
  to 
  have 
  other 
  hosts, 
  as 
  the 
  guava, 
  

   avocado, 
  mango 
  and 
  rose. 
  The 
  author 
  has 
  observed 
  the 
  adult 
  weevil 
  

   feeding 
  on 
  the 
  leaves 
  of 
  the 
  sugar 
  cane 
  and 
  on 
  those 
  of 
  the 
  " 
  jobo," 
  

   Spondias 
  lutea. 
  The 
  blackbirds 
  feed 
  upon 
  the 
  weevil 
  root-borer 
  at 
  

   ploughing 
  time. 
  Generally, 
  the 
  measures 
  of 
  control 
  would 
  be 
  collect- 
  

   ing 
  the 
  grubs 
  and 
  adults. 
  

  

  Schwartz. 
  Nikotin 
  als 
  Insektengift. 
  [Nicotin 
  as 
  an 
  Insect 
  Poison.] 
  — 
  

   Mitt. 
  k. 
  biol. 
  Anst. 
  fiir 
  Land- 
  und 
  Forstwirtschaft, 
  Berlin, 
  viii, 
  

   14th 
  Sept. 
  1913, 
  pp. 
  36-37. 
  

  

  Laboratory 
  experiments 
  were 
  made 
  to 
  find 
  the 
  effect 
  of 
  nicotin 
  and 
  

   its 
  salts 
  upon 
  insects. 
  Besides 
  pure 
  nicotin 
  the 
  following 
  salts 
  of 
  it 
  

   were 
  used 
  : 
  — 
  ^lactate, 
  acetate, 
  trichloracetate 
  and 
  nitrate. 
  All 
  these 
  

   substances, 
  in 
  0*015% 
  solution, 
  acted 
  as 
  a 
  skin 
  poison 
  upon 
  Aphids 
  

   (Rhopalosiphum 
  rihis). 
  Solutions 
  containing 
  0*025% 
  of 
  the 
  substance 
  

   killed 
  93-98% 
  of 
  the 
  Aphids. 
  As 
  an 
  internal 
  poison, 
  0*05% 
  solutions 
  

   were 
  effective 
  for 
  caterpillars 
  of 
  Vanessa 
  polychloros, 
  V. 
  io, 
  and 
  Orgyia 
  

   antiqua 
  ; 
  0*2% 
  solutions 
  for 
  caterpillars 
  of 
  Lymantria 
  dispar 
  and 
  

   Stilpnotia 
  salicis 
  ; 
  and 
  1% 
  solutions 
  for 
  Malacosoma 
  neustria. 
  Poi- 
  

   soned 
  food 
  affected 
  only 
  the 
  caterpillars 
  of 
  Vanessa 
  io 
  and 
  polychloros. 
  

   In 
  the 
  cases 
  where 
  the 
  caterpillars 
  of 
  these 
  species 
  ate 
  leaves 
  sprayed 
  

   with 
  nicotin 
  compounds, 
  they 
  pupated 
  imperfectly, 
  and 
  in 
  no 
  cases 
  

   were 
  butterflies 
  produced 
  from 
  them. 
  The 
  spray 
  solution 
  used 
  was 
  

   0*05% 
  in 
  strength. 
  The 
  difference 
  in 
  action 
  of 
  the 
  several 
  compounds 
  

   of 
  nicotin 
  used 
  was 
  not 
  worked 
  out. 
  

  

  The 
  following 
  Series 
  of 
  Abstracts 
  is 
  taken 
  from 
  « 
  Cafll), 
  OropOA'b 
  M 
  

   BaXMa*» 
  [Orchard, 
  Market 
  Garden 
  & 
  Bachza.] 
  — 
  The 
  Journal 
  of 
  the 
  

   Astrachan 
  Society 
  of 
  Fruit-Growers, 
  Market-Gardeners 
  & 
  Agriculturists, 
  

   Astrachan. 
  

  

  Sacharov 
  (N.). 
  Opatrum 
  sahulosum, 
  L., 
  KaKTa 
  BpeflMiejlb 
  SaXHeBblxli 
  

   pacTeH'm 
  bii 
  AcTpaxaHCKOM 
  r. 
  m 
  noAConHyxoe-b 
  b-b 
  GapaTOBCKOM. 
  

  

  [Opatrum 
  sahulosum, 
  L., 
  as 
  a 
  pest 
  of 
  cucurbitaceous 
  plants 
  in 
  the 
  

   Govt, 
  of 
  Astrachan 
  and 
  of 
  sunflower 
  seeds 
  in 
  the 
  Govt, 
  of 
  

   Saratov.] 
  — 
  Orchard, 
  Market-Garden 
  & 
  Bachza, 
  1913, 
  Reprint, 
  2 
  pp. 
  

  

  The 
  larvae 
  of 
  this 
  Tenebrionid 
  beetle 
  in 
  their 
  life-history, 
  and 
  in 
  the 
  

   character 
  of 
  the 
  damage 
  done 
  by 
  them, 
  resemble 
  the 
  larvae 
  of 
  Agriotes 
  

   lineatus, 
  L. 
  The 
  author 
  points 
  out, 
  therefore, 
  that 
  not 
  all 
  the 
  injury 
  

  

  *[The 
  Tartar 
  word 
  EaXMa 
  (Bachza) 
  is 
  used 
  in 
  South 
  and 
  South 
  Eastern 
  

   Russia 
  of 
  fields 
  set 
  apart 
  for 
  the 
  cultivation 
  of 
  various 
  species 
  of 
  melon, 
  

   chiefly 
  water 
  melons, 
  the 
  yield 
  varying 
  from 
  110 
  to 
  300 
  melons 
  per 
  acre. 
  

   These 
  fields 
  are 
  only 
  used 
  for 
  this 
  purpose 
  for 
  one 
  year, 
  after 
  which 
  they 
  

   are 
  given 
  up 
  to 
  ordinary 
  crops. 
  In 
  some 
  parts 
  of 
  the 
  chornoiziom 
  area 
  

   cucumbers 
  and 
  other 
  vegetables 
  are 
  grown 
  on 
  these 
  fields. 
  — 
  Ed.] 
  

  

  