﻿26 
  

  

  Spraying 
  must 
  be 
  carefully 
  and 
  thoroughly 
  carried 
  out, 
  otherwise 
  it 
  is 
  

   best 
  not 
  to 
  incur 
  a 
  useless 
  outlay. 
  Nicotin 
  will 
  keep 
  for 
  years 
  if 
  

   packed 
  in 
  air-tight 
  containers. 
  

  

  Williams 
  (B. 
  S.). 
  HadeMa 
  oleracea 
  destructive 
  to 
  Tomatoes. 
  — 
  Ento- 
  

   mologist, 
  London, 
  xlvi, 
  Dec. 
  1913, 
  p. 
  333. 
  

  

  In 
  a 
  short 
  note, 
  attention 
  is 
  drawn 
  to 
  the 
  fact 
  that 
  Polia 
  (Hadena) 
  

   oleracea, 
  L., 
  has 
  done 
  great 
  injury 
  to 
  tomatoes 
  all 
  over 
  England. 
  The 
  

   only 
  remedy 
  seems 
  to 
  be 
  to 
  collect 
  the 
  larvae 
  by 
  hand, 
  and 
  to 
  take 
  of¥ 
  

   the 
  top 
  layer 
  of 
  soil, 
  when 
  the 
  insects 
  are 
  in 
  the 
  pupal 
  stage, 
  and 
  burn 
  it, 
  

   both 
  of 
  which 
  processes 
  involve 
  considerable 
  labour. 
  Being 
  under 
  glass, 
  

   the 
  insects 
  are 
  protected 
  from 
  birds, 
  and 
  apparently 
  from 
  parasites 
  also. 
  

   Fumigation 
  had 
  not 
  been 
  tried. 
  

  

  Fkiedrichs 
  (K.). 
  Ueber 
  den 
  gegenwartigen 
  Stand 
  des 
  Bekamfung 
  

   des 
  Nashornkafers 
  (Oryctes 
  rJdnoceros, 
  L.) 
  in 
  Samoa. 
  [On 
  the 
  

  

  present 
  state 
  of 
  the 
  campaign 
  against 
  the 
  Rhinoceros 
  Beetle 
  in 
  

   Samoa.] 
  — 
  Der 
  Troioenjoflanzer, 
  Berlin, 
  xvii, 
  nos. 
  10, 
  11, 
  12, 
  Oct.- 
  

   Nov.-Dec. 
  1913, 
  pp. 
  538-558, 
  603-619, 
  660-675, 
  19 
  figs., 
  2 
  

   sketch-maps. 
  

  

  The 
  prosperity 
  of 
  Samoa 
  is 
  so 
  largely 
  dependent 
  on 
  the 
  coconut 
  

   palm 
  that 
  the 
  control 
  of 
  the 
  Rhinoceros 
  Beetle 
  constitutes 
  a 
  problem 
  

   of 
  the 
  very 
  highest 
  importance. 
  Where 
  the 
  Government 
  has 
  taken 
  

   immediate 
  and 
  energetic 
  measures, 
  the 
  pest 
  has 
  been 
  reduced, 
  but 
  on 
  

   the 
  whole 
  there 
  has 
  been 
  an 
  increase. 
  The 
  planting 
  district 
  around 
  

   Apia 
  has 
  suffered 
  most, 
  as 
  the 
  beetle 
  has 
  undisturbed 
  opportunities 
  

   for 
  breeding 
  in 
  the 
  cacao 
  and 
  Hevea 
  plantations, 
  and 
  the 
  coconut 
  palms 
  

   being 
  there 
  comparatively 
  few 
  in 
  number, 
  serve 
  as 
  an 
  attraction 
  for 
  

   countless 
  beetles. 
  The 
  coast 
  belt, 
  being 
  owned 
  mostly 
  by 
  natives, 
  

   who 
  prosecute 
  w^eekly 
  searches, 
  does 
  not 
  suffer 
  so 
  much. 
  

  

  The 
  direction 
  in 
  which 
  the 
  pest 
  spreads 
  is 
  generally 
  determined 
  by 
  

   the 
  prevailing 
  w^ind. 
  It 
  was 
  introduced 
  with 
  Hevea 
  plants 
  brought 
  

   to 
  Apia 
  from 
  Ceylon, 
  and 
  traces 
  of 
  its 
  ravages 
  w^ere 
  first 
  noticed 
  in 
  

   1910. 
  On 
  the 
  east 
  coast 
  the 
  damage 
  is 
  not 
  very 
  apparent, 
  but 
  the 
  

   trade 
  winds 
  on 
  the 
  w^est 
  coast 
  have 
  caused 
  a 
  rapid 
  spread. 
  The 
  

   bush 
  palm 
  {CypJiokentia 
  samoensis, 
  Warb.) 
  also 
  provides 
  the 
  insects 
  

   with 
  food, 
  but 
  it 
  is 
  not 
  feasible 
  to 
  combat 
  the 
  pest 
  in 
  the 
  bush. 
  

  

  Protection 
  of 
  the 
  Palms. 
  Vosseler 
  says 
  that 
  coarse-grained 
  sand 
  

   keeps 
  off 
  the 
  beetle. 
  This 
  may 
  be 
  useful 
  in 
  the 
  angles 
  of 
  the 
  leaves, 
  

   but 
  does 
  not 
  protect 
  the 
  yet 
  unopened 
  leaves, 
  which 
  suffer 
  most. 
  

   Labour 
  charges 
  would 
  also 
  be 
  heavy, 
  as 
  it 
  is 
  necessary 
  to 
  climb 
  the 
  

   palms 
  in 
  order 
  to 
  apply 
  the 
  sand. 
  The 
  tropical 
  rains 
  will 
  also 
  soon 
  

   wash 
  it 
  away 
  ; 
  experiments 
  are 
  being 
  made 
  with 
  tar, 
  as 
  a 
  protection 
  

   for 
  the 
  young 
  leaves, 
  but 
  it 
  seems 
  possible 
  that 
  it 
  may 
  prove 
  injurious 
  

   to 
  the 
  plants. 
  Should 
  a 
  mixture 
  of 
  tar 
  (§) 
  and 
  petroleum 
  (J) 
  reack 
  

   the 
  growing 
  point 
  through 
  a 
  bore-hole, 
  it 
  will 
  kill 
  the 
  palm. 
  Though 
  

   this 
  mixture 
  was 
  considered 
  to 
  be 
  excellent 
  by 
  a 
  local 
  planter, 
  the 
  

   author 
  saw 
  numerous 
  trees 
  destroyed 
  in 
  this 
  way 
  on 
  one 
  plantatioB. 
  

   It 
  has 
  not 
  yet 
  been 
  ascertained 
  if 
  tar 
  alone 
  acts 
  in 
  this 
  w^ay. 
  

  

  