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  author 
  found 
  that 
  in 
  certain 
  cases 
  the 
  insect 
  may 
  complete 
  its 
  life- 
  

   cycle 
  on 
  one 
  or 
  other 
  of 
  its 
  hosts 
  alone, 
  so 
  that 
  although 
  the 
  pest 
  may 
  be 
  

   reduced 
  by 
  destroying 
  one 
  of 
  the 
  host 
  plants, 
  it 
  will 
  not 
  necessarily 
  

   be 
  exterminated 
  altogether. 
  

  

  Jarvis 
  (E.). 
  Notes 
  on 
  the 
  Bean 
  Fly 
  (Agromyza 
  phaseoli). 
  — 
  Queens- 
  

   land 
  Agnc. 
  JL, 
  Brisbane, 
  Feb. 
  1913, 
  pp. 
  124-125, 
  & 
  Mar. 
  1913, 
  

   pp. 
  192-195, 
  2 
  pi. 
  

  

  French 
  beans 
  in 
  Southern 
  Queensland 
  are 
  subject 
  to 
  the 
  attack 
  of 
  

   the 
  bean 
  fly, 
  which 
  is 
  w^idely 
  distributed 
  in 
  the 
  Colony 
  and 
  does 
  con- 
  

   siderable 
  damage. 
  The 
  female 
  oviposits 
  in 
  the 
  leaf, 
  and 
  the 
  larva, 
  

   when 
  hatched, 
  tunnels 
  its 
  way 
  towards 
  the 
  leaf-stalk 
  ; 
  pupation 
  takes 
  

   place 
  in 
  the 
  swollen 
  bases 
  of 
  the 
  leaf-stalks. 
  

  

  Two 
  small 
  hymenopterous 
  insects 
  have 
  been 
  bred 
  from 
  the 
  bean 
  fly 
  

   in 
  sufficient 
  numbers 
  to 
  suggest 
  that 
  they 
  are 
  doing 
  considerable 
  control 
  

   work. 
  Regarding 
  artificial 
  remedies, 
  it 
  is 
  recommended 
  to 
  grow 
  a 
  

   small 
  crop 
  of 
  Canadian 
  Wonder 
  beans 
  to 
  meet 
  the 
  first 
  brood 
  of 
  flies 
  ; 
  

   if 
  found 
  to 
  be 
  harbouring 
  grubs 
  they 
  should 
  be 
  pulled 
  up 
  and 
  burned 
  

   without 
  delay. 
  All 
  old 
  bean 
  plants 
  that 
  have 
  ceased 
  to 
  be 
  profitable 
  

   should 
  be 
  rooted 
  up 
  and 
  burned. 
  The 
  stems 
  may 
  be 
  protected 
  by 
  

   earthing 
  them 
  up. 
  It 
  has 
  been 
  said 
  that 
  good 
  results 
  have 
  been 
  

   derived 
  from 
  growing 
  beans 
  in 
  a 
  shallow^ 
  trench 
  and 
  applying 
  to 
  the 
  

   soil, 
  so 
  as 
  not 
  to 
  touch 
  the 
  plants, 
  whitewash 
  made 
  from 
  acetylene 
  

   refuse 
  [see 
  this 
  Revieiv, 
  ser. 
  A, 
  i, 
  p. 
  191,] 
  or 
  lime 
  slaked 
  with 
  water 
  

   containing 
  carbolic 
  acid. 
  

  

  Jarvis 
  (E.). 
  Pumpkin 
  Beetles 
  and 
  how 
  to 
  destroy 
  them. 
  — 
  Queensland 
  

   Agric. 
  Jl, 
  Brisbane, 
  May 
  1913, 
  pp. 
  326-333, 
  2 
  pi. 
  

  

  Cucurbitaceous 
  plants, 
  which 
  would 
  otherwise 
  do 
  exceedingly 
  w^ell 
  

   in 
  Southern 
  Queensland, 
  are 
  subject 
  to 
  the 
  attacks 
  of 
  insect 
  enemies, 
  

   which 
  devour 
  the 
  foliage 
  and 
  flowers 
  and 
  frequently 
  kill 
  both 
  seed- 
  

   lings 
  and 
  young 
  plants. 
  The 
  worst 
  of 
  these 
  insects 
  is 
  the 
  Banded 
  

   Pumpkin 
  Beetle, 
  erroneously 
  called 
  the 
  " 
  Pumpkin 
  Ladybird 
  " 
  

   {AuJacophora 
  olivieri, 
  Guerin). 
  Although 
  especially 
  partial 
  to 
  the 
  

   leaves 
  and 
  flowers 
  of 
  cucurbits, 
  they 
  are 
  found 
  on 
  other 
  trees 
  and 
  shrubs, 
  

   and 
  doubtless 
  have 
  a 
  Avide 
  range 
  of 
  food-plants. 
  In 
  1908 
  they 
  were 
  

   recorded 
  as 
  having 
  seriously 
  damaged 
  ripe 
  cherries 
  in 
  New" 
  South 
  

   Wales. 
  They 
  have 
  also 
  been 
  known 
  to 
  destroy 
  apples 
  by 
  biting 
  

   throus^h 
  the 
  stalks 
  of 
  the 
  vounsf 
  fruit 
  and 
  causing^ 
  them 
  to 
  fall. 
  

  

  At 
  times 
  they 
  are 
  present 
  in 
  thousands 
  on 
  a 
  single 
  pumpkin 
  plant, 
  

   a 
  fact 
  not 
  to 
  be 
  attributed, 
  according 
  to 
  the 
  author, 
  to 
  gregarious 
  habits, 
  

   but 
  to 
  the 
  conspicuous 
  colouring 
  of 
  the 
  beetle 
  itself, 
  which 
  w^ould 
  attract 
  

   others 
  of 
  its 
  kind. 
  The 
  pest 
  has 
  been 
  recorded 
  in 
  Queensland 
  from 
  

   various 
  localities 
  in 
  the 
  districts 
  of 
  East 
  Moreton, 
  AVide 
  Bay, 
  Burnett, 
  

   Darling 
  Downs, 
  Port 
  Curtis, 
  Cook, 
  Warrego, 
  Leichardt, 
  and 
  Burke. 
  

   In 
  1907 
  it 
  w^as 
  especially 
  harmful 
  in 
  Southern 
  Queensland 
  during 
  

   November 
  ; 
  but 
  the 
  most 
  serious 
  outbreak 
  occurred 
  two 
  years 
  later, 
  

   when 
  the 
  insect 
  did 
  enormous 
  damage 
  over 
  a 
  wide 
  area 
  of 
  the 
  State. 
  

  

  The 
  eggs, 
  which 
  are 
  yellow^ 
  and 
  large 
  enough 
  to 
  be 
  plainly 
  visible, 
  

   are 
  laid 
  on 
  the 
  surface 
  of 
  damp 
  soil 
  or 
  immediately 
  under 
  it 
  among 
  

  

  