﻿446 
  

  

  Haltica 
  ampelophaga. 
  Although 
  the 
  latter 
  has 
  practically 
  disappeared 
  

   from 
  most 
  regions 
  in 
  Algeria, 
  it 
  is 
  still 
  necessary 
  to 
  combat 
  it 
  to 
  prevent 
  

   its 
  undue 
  multiplication. 
  As 
  soon 
  as 
  the 
  first 
  flea-beetles 
  appear, 
  

   arsenical 
  or 
  other 
  poisonous 
  sprays 
  must 
  be 
  applied 
  without 
  delay, 
  many 
  

   of 
  these 
  sprays 
  being 
  also 
  efficacious 
  in 
  killing 
  Polychrosis^ 
  which 
  caused 
  

   serious 
  damage 
  at 
  Rouiba 
  in 
  1913. 
  Nicotin 
  spray 
  is 
  prepared 
  from 
  

   the 
  concentrated 
  juice 
  of 
  tobacco, 
  1 
  lb. 
  of 
  the 
  extract 
  being 
  dissolved 
  

   in 
  100 
  gallons 
  of 
  water. 
  Arsenical 
  sprays 
  are 
  made 
  up 
  with 
  either 
  

   the 
  arsenite 
  or 
  arsenate 
  of 
  soda, 
  4 
  to 
  5 
  lb. 
  to 
  500 
  gallons 
  of 
  water. 
  

   Arsenate 
  of 
  lead 
  solutions 
  are 
  prepared 
  by 
  dissolving 
  2 
  lb. 
  of 
  anhydrous 
  

   sodium 
  arsenate 
  in 
  25 
  gallons 
  of 
  water 
  ; 
  to 
  this 
  is 
  added 
  a 
  solution 
  

   made 
  by 
  dissolving 
  6 
  lb. 
  of 
  lead 
  acetate 
  in 
  75 
  gallons 
  of 
  water 
  ; 
  the 
  

   action 
  of 
  the 
  spray 
  is 
  increased 
  by 
  adding 
  from 
  a 
  half 
  to 
  1 
  lb. 
  of 
  soft 
  

   soap. 
  Arsenate 
  of 
  copper 
  solution 
  is 
  prepared 
  by 
  adding 
  a 
  solution 
  

   containing 
  2 
  lb. 
  sodium 
  arsenate 
  to 
  one 
  containing 
  4 
  lb. 
  copper 
  sulphate, 
  

   lime 
  being 
  added 
  to 
  neutralise 
  the 
  solution. 
  Copper 
  arsenite 
  may 
  be 
  

   prepared 
  by 
  mixing 
  solutions 
  of 
  sodium 
  arsenite 
  and 
  copper 
  sulphate 
  ; 
  

   the 
  sodium 
  arsenite 
  may 
  be 
  obtained 
  in 
  commerce, 
  but 
  for 
  those 
  who 
  

   prefer 
  to 
  prepare 
  it 
  afresh 
  from 
  arsenious 
  acid, 
  the 
  following 
  details 
  

   are 
  given 
  : 
  in 
  2 
  gallons 
  of 
  boiling 
  water 
  dissolve 
  2 
  lb. 
  carbonate 
  of 
  

   soda, 
  and 
  add 
  by 
  degrees, 
  2 
  lb. 
  arsenious 
  acid 
  ; 
  boil 
  for 
  f 
  of 
  an 
  hour 
  ; 
  

   the 
  copper 
  sulphate 
  solution 
  is 
  prepared 
  by 
  dissolving 
  2 
  lb. 
  of 
  the 
  salt 
  

   in 
  10 
  gallons 
  of 
  water 
  ; 
  the 
  solution 
  of 
  lime 
  for 
  neutralising 
  is 
  prepared 
  

   by 
  adding 
  2 
  lb. 
  of 
  lime 
  to 
  10 
  gallons 
  of 
  water. 
  When 
  required 
  for 
  use, 
  

   one 
  part 
  of 
  the 
  sodium 
  arsenate 
  solution 
  is 
  added 
  to 
  50 
  parts 
  of 
  the 
  

   copper 
  sulphate 
  : 
  the 
  mixture 
  is 
  stirred, 
  and 
  to 
  it 
  is 
  added 
  50 
  parts 
  

   of 
  the 
  lime 
  solution. 
  

  

  ViVET 
  (E.). 
  Vignobles 
  attaques 
  par 
  la 
  Cetoine 
  velue. 
  [Vines 
  attacked 
  

   by 
  Epicometis 
  hirta, 
  Poda.] 
  — 
  Bull. 
  Agric. 
  Alger., 
  Tun., 
  Maroc, 
  

   Algiers, 
  xx, 
  no. 
  6, 
  March 
  1914, 
  pp. 
  191-192, 
  1 
  fig. 
  

  

  Vines 
  at 
  Rivet, 
  Maison-Blanche, 
  Desaix, 
  .4in-Bessem, 
  etc., 
  were 
  

   attacked 
  early 
  in 
  April 
  by 
  large 
  numbers 
  of 
  Epicometis 
  hirta, 
  Poda 
  

   {E. 
  hirtella, 
  L.), 
  which 
  devours 
  the 
  buds 
  and 
  young 
  grapes. 
  The 
  period 
  

   during 
  which 
  the 
  damage 
  is 
  done 
  is 
  short, 
  the 
  beetles 
  leaving 
  the 
  vines 
  

   as 
  soon 
  as 
  other 
  flowers 
  open 
  on 
  which 
  they 
  can 
  feed. 
  Hand-picking, 
  

   as 
  soon 
  as 
  the 
  insects 
  appear, 
  and 
  the 
  use 
  of 
  arsenical 
  sprays 
  are 
  

   advocated 
  ; 
  this 
  also 
  kills 
  the 
  flea-beetle 
  which 
  make 
  its 
  appearance 
  

   about 
  this 
  time. 
  

  

  HoLLRUNa 
  (M.). 
  Gedanken 
  uber 
  einige 
  neuzeitliche 
  Erkrankungen 
  an 
  

   tropischen 
  Nutzgewachsen. 
  [Review 
  of 
  recently 
  observed 
  diseases 
  

   of 
  tropical 
  cultivated 
  plants.] 
  — 
  Der 
  Tropenpflanzer, 
  Berlin, 
  xviii, 
  

   no. 
  3, 
  March 
  1914, 
  pp. 
  136-148. 
  

  

  This 
  paper 
  is 
  a 
  brief 
  review 
  of 
  the 
  more 
  recently 
  discovered 
  diseases 
  

   caused 
  by 
  insects 
  and 
  fungi 
  on 
  tropical 
  cultivated 
  plants. 
  

  

  MoRSTATT 
  (H.). 
  Kaffeekultur, 
  Kaffeeschadlinge 
  und 
  andere 
  schadliche 
  

   Insekten 
  im 
  Bezirk 
  Bukoba. 
  [Coffee 
  cultivation, 
  coflee 
  pests 
  and 
  

   other 
  injurious 
  insects 
  in 
  the 
  province 
  of 
  Bukoba.] 
  — 
  Der 
  Pflanzer, 
  

   Daressalaam, 
  x, 
  no. 
  3, 
  March 
  1914, 
  pp. 
  133-141. 
  

  

  Coffee 
  cultivation 
  in 
  Bukoba 
  is 
  facilitated 
  bv 
  the 
  fact 
  that 
  there 
  are 
  

  

  