﻿i 
  i 
  

  

  La 
  Prospaltella 
  herlesei. 
  — 
  Gaceta 
  Ruml, 
  Buenos 
  Aires, 
  vii, 
  no. 
  80, 
  

   March 
  1914, 
  p. 
  647. 
  

  

  Anlacasjpsis 
  (Diasjpis) 
  pentagona 
  appeared 
  in 
  the 
  Argentine 
  about 
  10 
  

   years 
  ago, 
  and 
  has 
  caused 
  severe 
  losses 
  near 
  Buenos 
  Aires. 
  Mulberry 
  

   twigs 
  infested 
  with 
  this 
  scale 
  parasitised 
  by 
  Prospaltella 
  berlesei 
  have 
  

   now 
  been 
  introduced 
  from 
  Uruguay, 
  whither 
  the 
  Chalcid 
  was 
  

   imported 
  last 
  year 
  and 
  promises 
  to 
  become 
  an 
  efficient 
  control. 
  

  

  Poltiglia 
  solfo-calcica. 
  [The 
  lime-sulphur 
  spray.] 
  — 
  Gimn. 
  Ag^'ic. 
  

   Merid., 
  Messina, 
  vii, 
  no. 
  3, 
  March 
  1914, 
  p. 
  37. 
  

  

  The 
  Cattedra 
  Ambulante 
  di 
  Agricoltura 
  of 
  Messina 
  has 
  enlarged 
  its 
  

   plant 
  for 
  the 
  production 
  of 
  lime-sulphur 
  mixture 
  and 
  gives 
  the 
  following 
  

   data 
  : 
  Instead 
  of 
  direct 
  heat, 
  steam 
  is 
  used, 
  and 
  mechanical 
  mixers 
  

   worked 
  by 
  steam 
  replace 
  the 
  old 
  method 
  of 
  hand- 
  mixing. 
  These 
  changes 
  

   enabled 
  about 
  1,400 
  cwt. 
  more 
  polysulphides 
  to 
  be 
  turned 
  out 
  ; 
  the 
  

   cost 
  of 
  production 
  was 
  reduced 
  by 
  25 
  per 
  cent, 
  and 
  the 
  piice 
  was 
  

   reduced 
  to 
  members, 
  from 
  about 
  3^. 
  6d. 
  per 
  cwt. 
  to 
  about 
  25. 
  8d. 
  per 
  

   cwt. 
  Furthermore, 
  the 
  clear 
  liquid 
  was 
  supplied 
  and 
  this 
  is 
  an 
  

   additional 
  advantage, 
  for 
  tests 
  made 
  by 
  the 
  Cattedra 
  have 
  proved, 
  

   contrary 
  to 
  accepted 
  belief, 
  that 
  the 
  sediment 
  is 
  valueless 
  as 
  an 
  

   insecticide. 
  

  

  Scarabee 
  or 
  Jacobs. 
  — 
  Agric. 
  News, 
  Barbados, 
  xiii, 
  no. 
  310, 
  14th 
  March 
  

   1914, 
  p. 
  90. 
  

  

  The 
  sweet 
  potato 
  weevil, 
  Euscepes 
  (Cnjptorrhynchus) 
  batatae, 
  known 
  

   as 
  the 
  Scarabee 
  or 
  Jacobs, 
  has 
  frequently 
  been 
  referred 
  to 
  [see 
  this 
  

   Review, 
  Ser. 
  A, 
  i, 
  pp. 
  263 
  & 
  329] 
  and 
  is 
  of 
  importance, 
  as 
  it 
  causes 
  

   severe 
  injury 
  to 
  a 
  valuable 
  food 
  crop. 
  It 
  is 
  difficult 
  to 
  control, 
  

   for 
  the 
  larval 
  and 
  pupal 
  stages 
  are 
  spent 
  within 
  the 
  tissues 
  of 
  the 
  root 
  

   or 
  stem 
  of 
  the 
  plant. 
  Slips 
  free 
  from 
  infestation 
  by 
  either 
  eggs 
  or 
  

   larvae 
  of 
  the 
  beetle, 
  should 
  alone 
  be 
  planted, 
  greater 
  security 
  being 
  

   attained 
  by 
  producing 
  them 
  in 
  a 
  nursery. 
  To 
  do 
  this, 
  a 
  spot 
  should 
  

   be 
  selected 
  where 
  potatoes 
  have 
  not 
  been 
  grown 
  for 
  a 
  long 
  time 
  and 
  

   this 
  should 
  be 
  planted 
  with 
  small 
  roots 
  taken 
  from 
  a 
  field 
  where 
  

   little 
  or 
  no 
  infestation 
  is 
  present. 
  The 
  first 
  attack 
  always 
  occurs 
  

   on 
  the 
  larger 
  tubers, 
  then 
  the 
  old 
  hard 
  portions 
  of 
  the 
  stem 
  are 
  

   invaded, 
  while 
  the 
  small 
  roots 
  are 
  among 
  the 
  last 
  parts 
  to 
  be 
  infested. 
  

   As 
  the 
  nursery 
  beds 
  produce 
  vines 
  of 
  sufficient 
  size 
  and 
  strength, 
  

   they 
  should 
  be 
  cut 
  and 
  planted, 
  and 
  if 
  the 
  nursery 
  beds 
  are 
  not 
  

   maintained 
  for 
  more 
  than 
  6 
  to 
  8 
  months, 
  there 
  is 
  very 
  little 
  chance 
  of 
  

   any 
  of 
  the 
  slips 
  becoming 
  infected. 
  After 
  that 
  the 
  nursery 
  should 
  be 
  

   forked 
  and 
  if 
  no 
  signs 
  of 
  scarabee 
  infestation 
  are 
  visible, 
  the 
  same 
  

   plot 
  may 
  be 
  used 
  again 
  ; 
  otherwise, 
  a 
  new 
  nursery 
  should 
  be 
  establi- 
  

   shed. 
  A 
  field 
  of 
  sweet 
  potatoes 
  planted 
  from 
  such 
  a 
  nursery 
  should 
  

   be 
  quite 
  free 
  from 
  scarabee 
  for 
  some 
  time 
  and 
  might 
  be 
  used 
  as 
  a 
  

   source 
  of 
  slips 
  for 
  planting, 
  provided 
  these 
  were 
  taken 
  at 
  the 
  earliest 
  

   possible 
  date, 
  since 
  the 
  danger 
  increases 
  with 
  the 
  age 
  of 
  the 
  plants. 
  

  

  Destruction 
  des 
  pucerons 
  noirs 
  de 
  la 
  betterave. 
  [The 
  destruction 
  of 
  

   the 
  black 
  aphis 
  of 
  the 
  beetroot.] 
  — 
  Jl. 
  d^ 
  Agric. 
  pratique, 
  Paris, 
  

   xxvii, 
  no. 
  11, 
  12th 
  March 
  1914, 
  p. 
  349. 
  

  

  In 
  reply 
  to 
  a 
  correspondent 
  whose 
  beetroots 
  have 
  been 
  attacked 
  

  

  