﻿234 
  

  

  obtain 
  data 
  about 
  the 
  next 
  generation. 
  The 
  following 
  costs 
  are 
  

   based 
  on 
  practice 
  with 
  a 
  vineyard 
  of 
  10 
  hectares 
  (25 
  acres) 
  ; 
  earthen- 
  

   ware 
  pots 
  of 
  the 
  stated 
  dimensions 
  costing 
  45. 
  9d. 
  per 
  100 
  delivered 
  

   at 
  the 
  nearest 
  station 
  ; 
  3 
  complete 
  fillings 
  — 
  1 
  for 
  each 
  generation, 
  

   and 
  15 
  refills 
  — 
  one 
  every 
  third 
  day 
  during 
  the 
  three 
  18-day 
  average 
  

   periods, 
  each 
  refill 
  being 
  of 
  80 
  c.c. 
  (2| 
  oz.) 
  The 
  total 
  solution 
  required 
  

   is 
  3,300 
  litres 
  (726 
  gals.), 
  to 
  prepare 
  which 
  a 
  maximum 
  of 
  350 
  kilogs. 
  

   (770 
  lb.) 
  of 
  molasses 
  costing 
  84^., 
  and 
  150 
  litres 
  (33 
  gals.) 
  of 
  wine-lees 
  

   costing 
  24.S. 
  are 
  necessary. 
  The 
  cost 
  of 
  2,000 
  pots 
  is 
  965., 
  which 
  may 
  

   be 
  spread 
  over 
  5 
  years, 
  giving 
  the 
  cost 
  for 
  one 
  year's 
  operations 
  as 
  

   195. 
  The 
  total 
  cost 
  of 
  labour 
  (30 
  days 
  at 
  2 
  francs) 
  is 
  485. 
  Thus 
  the 
  

   total 
  expense 
  works 
  out 
  at 
  £8 
  I65. 
  per 
  annum. 
  The 
  traps 
  must 
  be 
  

   inspected 
  about 
  twice 
  a 
  week 
  and 
  all 
  moths 
  captured 
  must 
  be 
  removed 
  

   before 
  re-filling 
  to 
  the 
  original 
  level. 
  This 
  system 
  of 
  bait 
  traps 
  is 
  

   eminently 
  suitable 
  for 
  appHcation 
  by 
  co-operative 
  associations. 
  

  

  La 
  destruction 
  du 
  Puceron 
  Lanigere. 
  [Destruction 
  of 
  the 
  woolly 
  aphis.] 
  

   — 
  Bull. 
  Soc. 
  d' 
  Etude 
  Vulg. 
  Zool. 
  Agric, 
  Bordeaux, 
  xiii, 
  no. 
  1, 
  Jan. 
  

   1914, 
  pp. 
  14-15. 
  

  

  Three 
  formulae 
  are 
  given 
  which, 
  upon 
  the 
  advice 
  of 
  M. 
  Duval 
  of 
  

   Boulogne-sur-Seine, 
  have 
  been 
  used 
  against 
  the 
  woolly 
  aphis 
  (Schizo- 
  

   nevra 
  lanigera) 
  and 
  have 
  proved 
  satisfactory. 
  (1) 
  In 
  the 
  case 
  of 
  leaves 
  

   and 
  young 
  shoots 
  newly 
  invaded, 
  apply 
  a 
  spray 
  made 
  up 
  as 
  follows 
  : 
  — 
  

   Rain 
  w^ater, 
  1 
  litre 
  ; 
  potassium 
  carbonate, 
  4 
  gms. 
  ; 
  sulphoricinate 
  of 
  

   soda, 
  30 
  gms. 
  ; 
  methylated 
  spirit, 
  30 
  gms. 
  ; 
  nicotin 
  (extract 
  100 
  grms. 
  

   per 
  litre), 
  10 
  gms. 
  ; 
  the 
  potassium 
  carbonate 
  is 
  dissolved 
  in 
  water 
  

   and 
  the 
  other 
  ingredients 
  added, 
  the 
  solution 
  being 
  boiled 
  and 
  stirred. 
  

   Under 
  the 
  action 
  of 
  this 
  spray 
  the 
  downy 
  covering 
  of 
  the 
  insects 
  is 
  

   dissolved 
  and 
  the 
  insects 
  themselves 
  at 
  length 
  destroyed. 
  (2) 
  In 
  the 
  

   case 
  of 
  attacks 
  on 
  older 
  parts 
  of 
  the 
  tree, 
  the 
  spray 
  must 
  be 
  applied 
  

   as 
  soon 
  as 
  the 
  white 
  down 
  of 
  the 
  insects 
  is 
  observed 
  ; 
  the 
  foregoing 
  

   formula 
  may 
  be 
  used, 
  but 
  generally 
  it 
  is 
  necessary 
  to 
  have 
  recourse 
  to 
  

   some 
  stronger 
  spray, 
  as 
  at 
  this 
  time 
  the 
  insects 
  are 
  covered 
  with 
  a 
  

   more 
  resistant 
  coat 
  ; 
  the 
  following 
  formula 
  is 
  given 
  : 
  — 
  rain 
  water, 
  

   1 
  litre 
  ; 
  sulforicinate 
  of 
  soda, 
  40 
  gms. 
  ; 
  American 
  potash, 
  12 
  gms. 
  ; 
  

   methylated 
  spirit, 
  20 
  gms. 
  ; 
  and 
  nicotin 
  extract, 
  20 
  gms. 
  This 
  solu- 
  

   tion 
  is 
  liable 
  to 
  damage 
  the 
  leaves 
  more 
  than 
  the 
  other, 
  but 
  not 
  seriously. 
  

   (3) 
  The 
  third 
  formula 
  given 
  is 
  for 
  destroying 
  the 
  eggs 
  in 
  winter 
  ; 
  it 
  is 
  

   recommended 
  to 
  fill 
  all 
  crevices 
  and 
  holes 
  in 
  the 
  trunk 
  and 
  branches 
  

   at 
  the 
  end 
  of 
  October 
  with 
  the 
  following 
  liquid 
  : 
  — 
  rain 
  water, 
  1 
  litre 
  ; 
  

   black 
  soap, 
  350 
  gms. 
  ; 
  sulforicinate 
  of 
  soda, 
  50 
  gms. 
  ; 
  the 
  soap 
  is 
  

   dissolved 
  in 
  warm 
  water 
  and 
  the 
  sulforicinate 
  added, 
  a 
  thick 
  syrup 
  

   being 
  formed, 
  which 
  can 
  be 
  applied 
  with 
  a 
  brush. 
  Woolly 
  aphids 
  

   which 
  attack 
  the 
  roots 
  should 
  be 
  destroyed 
  at 
  the 
  end 
  of 
  November 
  

   by 
  opening 
  the 
  ground 
  round 
  the 
  trees 
  and 
  spraying 
  on 
  the 
  attacked 
  

   roots 
  the 
  liquid 
  recommended 
  for 
  the 
  leaves 
  and 
  shoots. 
  

  

  Boucher 
  (W. 
  A.). 
  Orchard 
  Work 
  for 
  February 
  Codlin 
  Moth. 
  — 
  Jl. 
  

  

  Agric, 
  Wellington, 
  N.Z., 
  xiii, 
  no. 
  1, 
  1914, 
  p. 
  87. 
  

  

  Fruit-growers 
  in 
  New 
  Zealand 
  are 
  advised 
  to 
  spray 
  with 
  a 
  reliable 
  

   brand 
  of 
  arsenate 
  of 
  lead 
  before 
  the 
  end 
  of 
  the 
  second 
  week 
  of 
  

   February. 
  Serious 
  infection 
  by 
  codling 
  moth 
  has 
  often 
  occurred 
  in 
  

   February 
  when 
  sprapng 
  has 
  been 
  discontinued 
  at 
  the 
  end 
  of 
  January, 
  

  

  I 
  

  

  