﻿296 
  

  

  Contra 
  el 
  bicho 
  moro. 
  [Control 
  of 
  the 
  black 
  (Meloid) 
  beetle.]— 
  (roce^a 
  

   Rural, 
  Buerws 
  Aires, 
  vii, 
  no, 
  78, 
  Jan. 
  1914, 
  p. 
  525. 
  

  

  This 
  insect 
  belongs 
  to 
  the 
  family 
  Meloidae 
  and 
  is 
  | 
  to 
  f 
  of 
  an 
  inch 
  in 
  

   length, 
  with 
  a 
  blackish 
  conical 
  body, 
  covered 
  with 
  light 
  grey 
  pubescence 
  

   The 
  perfect 
  insect 
  feeds 
  on 
  the 
  leaves 
  of 
  the 
  potato, 
  tomato, 
  and 
  other 
  

   solanaceous 
  plants 
  and 
  devours 
  them 
  with 
  such 
  voracity 
  as 
  to 
  strip 
  

   the 
  fields 
  in 
  a 
  few 
  days. 
  The 
  female 
  oviposits 
  on 
  the 
  ground 
  and 
  the 
  

   primary 
  larvae 
  emerge 
  in 
  20 
  or 
  25 
  days. 
  These 
  larvae 
  are 
  active 
  and 
  move 
  

   about 
  in 
  search 
  of 
  food. 
  When 
  full 
  fed 
  they 
  assume 
  the 
  second 
  sedentary 
  

   form, 
  their 
  shape 
  altering 
  as 
  they 
  approach 
  the 
  pseudochrysalis 
  stage, 
  

   in 
  which 
  they 
  pass 
  the 
  winter. 
  From 
  this 
  pseudochrysalis 
  another 
  

   larva 
  emerges 
  in 
  spring 
  and 
  pupates 
  in 
  a 
  few 
  days, 
  the 
  imago 
  emerging 
  

   after 
  an 
  interval 
  of 
  8 
  days. 
  

  

  The 
  destruction 
  of 
  the 
  beetle 
  may 
  be 
  effected 
  in 
  various 
  ways. 
  The 
  

   rows 
  of 
  attacked 
  plants 
  may 
  be 
  gone 
  over 
  with 
  a 
  large 
  broad 
  tray 
  into 
  

   which 
  the 
  insects 
  may 
  be 
  shaken 
  from 
  the 
  plants. 
  This 
  must 
  be 
  done 
  

   early 
  in 
  the 
  morning 
  and 
  is 
  not 
  much 
  more 
  costly 
  than 
  the 
  use 
  of 
  

   arsenic, 
  if 
  suitable 
  labour 
  is 
  cheap. 
  The 
  second 
  method 
  is 
  to 
  spray 
  

   with 
  Bordeaux 
  mixture 
  or 
  other 
  cupric 
  solution. 
  The 
  applications 
  

   must 
  be 
  made 
  immediately 
  the 
  first 
  insects 
  appear. 
  The 
  addition 
  of 
  

   1 
  part 
  of 
  lysol 
  to 
  1,000 
  parts 
  of 
  the 
  mixture 
  is 
  useful. 
  The 
  third 
  

   method 
  is 
  the 
  employment 
  of 
  copper 
  arsenate 
  in 
  liquid 
  form, 
  4 
  oz. 
  

   being 
  dissolved 
  in 
  22 
  gals, 
  water. 
  If 
  of 
  cheap 
  quality, 
  the 
  quantity 
  may 
  

   be 
  increased 
  up 
  to 
  8 
  oz. 
  

  

  MuRANiA 
  (G.). 
  Bianca 
  rossa 
  {Chrysomphalus 
  dictyospermi 
  var. 
  rinnu- 
  

   lifera, 
  Mask.). 
  — 
  Rinnovamento 
  econ&mico-agrario, 
  Trapani, 
  viii, 
  

   no. 
  1, 
  Jan. 
  1914, 
  pp. 
  7-9. 
  

  

  The 
  author 
  states 
  that 
  the 
  Agricultural 
  Station 
  at 
  Messina 
  has 
  

   worked 
  out 
  the 
  cost 
  of 
  lime-sulphur 
  for 
  each 
  citrus 
  tree 
  at 
  just 
  under 
  

   3 
  pence 
  for 
  winter 
  treatment 
  and 
  a 
  little 
  less 
  for 
  spring 
  treatment. 
  In 
  

   the 
  United 
  States, 
  hydrocyanic 
  acid 
  fumigation 
  is 
  practised 
  at 
  a 
  cost 
  

   of 
  20 
  pence 
  per 
  tree, 
  each 
  tree 
  bringing 
  in 
  a 
  net 
  revenue 
  of 
  over 
  17 
  

   shilHngs. 
  Spraying 
  with 
  lime-sulphur 
  is 
  only 
  of 
  use 
  when 
  the 
  larvae 
  

   are 
  naked, 
  as 
  the 
  adults 
  have 
  a 
  thick 
  skin 
  which 
  protects 
  them 
  from 
  it. 
  

   A 
  simple 
  guide 
  is 
  provided 
  by 
  a 
  bottle 
  in 
  which 
  some 
  attacked 
  twigs 
  

   or 
  leaves 
  are 
  placed 
  in 
  January, 
  May, 
  or 
  August, 
  and 
  daily 
  examined 
  

   by 
  transmitted 
  light 
  until 
  minute 
  insects 
  are 
  seen 
  wandering 
  on 
  the 
  

   sides. 
  The 
  appearance 
  of 
  these 
  larvae 
  indicates 
  that 
  the 
  favourable 
  

   moment 
  for 
  operating 
  has 
  been 
  reached. 
  Of 
  the 
  enemies 
  introduced 
  

   for 
  control 
  purposes, 
  the 
  Coccinellid 
  beetles, 
  Chilocorus 
  Jcuvanae 
  and 
  

   Rhizohius 
  lophantae, 
  seem 
  efficacious. 
  

  

  Zimmerman 
  (H.). 
  Einige 
  Beobachtungen 
  iiber 
  die 
  Johannisbeergallmilbe 
  

  

  (Eriophyes 
  (Phytoptus) 
  rihis, 
  Westwood) 
  an 
  Rihes 
  alpinum 
  in 
  

   Mecklenburg. 
  [Observations 
  on 
  the 
  currant 
  gall-mite 
  in 
  Mecklen- 
  

   burg.] 
  — 
  Archiv. 
  des 
  Ver. 
  der 
  Freunde 
  der 
  Naturgeschichte 
  in 
  

   Mecklenburg, 
  Rostock, 
  Ixvii, 
  pt. 
  1, 
  1913, 
  pp. 
  130-136. 
  

  

  The 
  currant 
  gall-mite 
  (Eriophyes 
  rihis) 
  is 
  a 
  pest 
  of 
  currants 
  (Rihes 
  

   ruhrum 
  and 
  R. 
  nigrum) 
  of 
  widespread 
  distribution, 
  and 
  occurs 
  in 
  the 
  

   neighbourhood 
  of 
  Rostock, 
  Mecklenburg, 
  on 
  Rihes 
  alpinum. 
  Eggs 
  are 
  laid 
  

  

  