﻿127 
  

  

  were 
  made, 
  and 
  cultures 
  brought 
  to 
  their 
  maximum 
  virulence 
  in 
  the 
  

   laboratory 
  were 
  introduced 
  on 
  a 
  swarm 
  of 
  half-grown 
  locusts. 
  The 
  

   results 
  were 
  practically 
  nil 
  and 
  the 
  contagion 
  did 
  not 
  spread. 
  

  

  Stand 
  der 
  Reblausbekampfung 
  im 
  Jahre 
  1912 
  in 
  den 
  Kantonen 
  Zurich 
  

   und 
  Thurgau. 
  [Phylloxera 
  control 
  in 
  the 
  cantons 
  of 
  Zurich 
  and 
  

   Thurgau 
  in 
  1912.] 
  — 
  Schweiz. 
  Zeits. 
  Obst- 
  und 
  Weinbau, 
  Frauenfeld, 
  

   no. 
  22, 
  24th 
  Nov. 
  1913, 
  pp. 
  349-350. 
  

  

  In 
  26 
  communes 
  4,781 
  infected 
  stocks 
  were 
  noticed 
  in 
  247 
  new 
  points. 
  

   Five 
  permits 
  were 
  granted 
  to 
  replant 
  previously 
  infected 
  areas 
  with 
  

   745 
  native 
  stocks 
  and 
  two 
  permits 
  for 
  443 
  were 
  refused. 
  Twenty-five 
  

   proprietors 
  renounced 
  re-planting 
  on 
  payment 
  of 
  a 
  lump 
  sum. 
  

   Replanting 
  with 
  grafts 
  on 
  American 
  stocks 
  is 
  allowed 
  after 
  an 
  interval 
  

   of 
  at 
  least 
  four 
  years, 
  or 
  eight 
  years 
  in 
  the 
  case 
  of 
  native 
  stocks. 
  As 
  

   a 
  trial, 
  nurseries 
  for 
  grafted 
  vines 
  were 
  established 
  at 
  Steinmaur 
  and 
  

   Dielsdorf 
  . 
  In 
  the 
  latter 
  place 
  two 
  new 
  experimental 
  plots 
  were 
  planted 
  

   with 
  grafted 
  vines. 
  This 
  brings 
  the 
  number 
  of 
  Zurich 
  plots 
  up 
  to 
  26, 
  

   all 
  in 
  an 
  average 
  good 
  condition, 
  and 
  the 
  material 
  for 
  these 
  was 
  supplied 
  

   by 
  the 
  Swiss 
  Experiment 
  Station 
  at 
  Wadenswil. 
  In 
  spite 
  of 
  the 
  

   vine 
  tax, 
  the 
  vine 
  fund 
  has 
  fallen 
  from 
  £5,218 
  to 
  £5,055. 
  From 
  1886 
  to 
  

   1912, 
  731,895 
  stocks 
  on 
  an 
  area 
  of 
  about 
  125,000 
  acres 
  were 
  destroyed 
  

   in 
  the 
  Canton 
  of 
  Zurich, 
  and 
  the 
  costs 
  were 
  as 
  follows 
  : 
  — 
  Wages, 
  

   £31,189 
  ; 
  Chemicals, 
  £6,563 
  ; 
  compensation, 
  £33,971 
  ; 
  other 
  expenses, 
  

   £10,522. 
  The 
  total 
  cost 
  was 
  £82,246. 
  A 
  portion 
  of 
  the 
  cleared 
  land 
  

   has 
  again 
  been 
  planted 
  with 
  vines, 
  partly 
  as 
  experimental 
  plots 
  with 
  

   grafted 
  stocks, 
  and 
  partly 
  with 
  native 
  stocks. 
  

  

  The 
  Canton 
  of 
  Thurgau 
  report 
  mentions 
  333 
  infected 
  stocks 
  at 
  59 
  

   points. 
  Proprietors 
  were 
  paid 
  £71 
  compensation 
  for 
  the 
  destruction 
  

   of 
  2,591 
  stocks 
  on 
  an 
  area 
  of 
  half 
  an 
  acre. 
  In 
  1912, 
  no 
  infection 
  was 
  

   noticed 
  in 
  the 
  communes 
  of 
  Landschlacht, 
  Gachnang, 
  Aadorf 
  and 
  

   Altnau. 
  The 
  campaign 
  was 
  begun 
  in 
  1897 
  and 
  up 
  to 
  1912 
  a 
  total 
  of 
  

   440,844 
  stocks 
  had 
  been 
  destroyed 
  and 
  the 
  proprietors 
  paid 
  £1,574 
  

   for 
  the 
  grapes 
  and 
  £5,274 
  for 
  the 
  stocks. 
  The 
  report 
  does 
  not 
  give 
  any 
  

   other 
  figures. 
  Five 
  experimental 
  plots 
  of 
  grafted 
  vines 
  have 
  been 
  

   planted 
  in 
  the 
  former 
  Phylloxera 
  centres. 
  

  

  J. 
  D. 
  Zum 
  diesjahrigen 
  Mottenflug. 
  [The 
  vine-moth 
  flight 
  in 
  1913.] 
  — 
  

   Luxemhurger 
  Weinztng., 
  Grevenmacher 
  , 
  i, 
  no. 
  30, 
  15 
  Nov. 
  1913, 
  

   pp. 
  517-518. 
  

  

  Experiments 
  lasting 
  from 
  10th 
  July 
  to 
  30th 
  August 
  were 
  conducted 
  

   by 
  Herr 
  Fixmer 
  of 
  Grevenmacher, 
  who 
  found 
  that 
  the 
  flight 
  took 
  place 
  

   from 
  18th 
  July 
  to 
  29th 
  August, 
  thus 
  occupying 
  no 
  less 
  than 
  43 
  days. 
  

   Four 
  beer- 
  traps 
  were 
  used. 
  A 
  total 
  of 
  1,393 
  moths 
  were 
  captured, 
  or 
  

   348 
  per 
  trap. 
  According 
  to 
  these 
  figures 
  the 
  system 
  of 
  trapping 
  is 
  

   a 
  profitable 
  one. 
  The 
  largest 
  number 
  taken 
  was 
  112, 
  on 
  the 
  28th 
  July. 
  

   The 
  great 
  variation 
  in 
  the 
  numbers 
  caught 
  daily 
  does 
  not 
  allow 
  of 
  a 
  

   useful 
  average 
  being 
  struck 
  and 
  cannot 
  be 
  accounted 
  for. 
  It 
  is 
  hoped 
  

   that 
  next 
  time 
  the 
  figures 
  will 
  be 
  completed 
  by 
  notes 
  on 
  the 
  weather 
  

   conditions 
  prevaihng. 
  Such 
  experiments 
  are 
  a 
  valuable 
  aid 
  in 
  deter- 
  

   mining 
  the 
  proper 
  time 
  for 
  beginning 
  control 
  measures. 
  

  

  