﻿682 
  

  

  injured 
  the 
  plants 
  severely 
  in 
  some 
  instances. 
  This 
  year 
  the 
  vines 
  

   appear 
  to 
  have 
  had 
  httle 
  power 
  of 
  resistance, 
  as 
  scorching 
  was 
  noticed 
  

   in 
  localities 
  where 
  weak 
  Bordeaux 
  mixture 
  was 
  used. 
  Control 
  was 
  

   hampered 
  by 
  continued 
  bad 
  weather, 
  in 
  consequence 
  of 
  which 
  the 
  

   flight 
  of 
  the 
  moths 
  was 
  prolonged. 
  To 
  spray 
  100 
  stocks, 
  20 
  pints 
  of 
  

   solution 
  were 
  required 
  on 
  an 
  average, 
  the 
  usual 
  time 
  necessary 
  being 
  

   67 
  minutes. 
  In 
  one 
  case, 
  where 
  the 
  leaves 
  were 
  also 
  sprayed, 
  about 
  

   58 
  pints 
  of 
  solution 
  were 
  used 
  in 
  90 
  minutes. 
  On 
  an 
  average, 
  4 
  lb. 
  of 
  

   powder 
  and 
  12 
  minutes 
  time 
  were 
  necessary 
  for 
  dusting 
  100 
  stocks. 
  

   The 
  local 
  cost 
  of 
  the 
  various 
  insecticides 
  is 
  given. 
  

  

  P. 
  F. 
  Zur 
  geschmacklichen 
  Beeinflussung 
  der 
  Moste 
  und 
  Weine 
  durch 
  

   die 
  Wurmbekampfung 
  mit 
  Nicotin. 
  [The 
  efiect 
  of 
  nicotin 
  used 
  

   against 
  Clysia 
  ambiguella 
  on 
  the 
  taste 
  of 
  musts 
  and 
  wines.] 
  — 
  

   Luxemhurger 
  Weinztg., 
  Grevenmacher, 
  ii, 
  no. 
  14, 
  15th 
  July 
  1914, 
  

   pp. 
  228-230. 
  

  

  The 
  opinions 
  of 
  several 
  authorities 
  are 
  quoted 
  with 
  regard 
  to 
  whether 
  

   musts 
  and 
  wines 
  acquire 
  any 
  special 
  flavour 
  from 
  the 
  nicotin 
  spray 
  

   used 
  against 
  Clysia 
  ambiguella. 
  It 
  is 
  agreed 
  that 
  a 
  carefully 
  prepared 
  

   spray, 
  apphed 
  at 
  the 
  proper 
  time, 
  communicates 
  no 
  such 
  taste, 
  at 
  any 
  

   rate 
  when 
  copper 
  sulphate 
  is 
  nearly 
  or 
  entirely 
  absent. 
  The 
  spray 
  

   solution 
  should 
  therefore 
  contain 
  only 
  nicotin 
  and 
  soap. 
  

  

  ZscHOKKE 
  (A.). 
  Versuche 
  iiber 
  Heuwurmbekampfung. 
  [Experiments 
  

   in 
  the 
  control 
  of 
  the 
  first 
  generation 
  of 
  Clysia 
  ambiguella, 
  Hbn.] 
  

   — 
  Weinbau 
  der 
  Rheinpfalz, 
  Neustadt 
  a. 
  d. 
  Hdt., 
  ii, 
  no. 
  17, 
  15th 
  

   July 
  1914, 
  pp. 
  186-196. 
  

  

  The 
  chemical 
  control 
  of 
  Clysia 
  ambiguella, 
  Hbn., 
  is 
  dealt 
  with, 
  the 
  

   results 
  of 
  experiments 
  on 
  66 
  plots, 
  in 
  the 
  spring 
  of 
  1914, 
  being 
  given. 
  

   Uniform 
  results 
  are 
  not 
  possible 
  in 
  a 
  big 
  vineyard, 
  as 
  spraying 
  takes 
  

   time 
  and 
  the 
  larvae 
  grow 
  rapidly. 
  When 
  cold 
  weather 
  interrupts 
  

   the 
  flight 
  of 
  the 
  adults, 
  the 
  first 
  generation 
  becomes 
  divided 
  into 
  two 
  

   distinct 
  larval 
  periods, 
  to 
  control 
  which 
  two 
  sprayings 
  are 
  necessary. 
  

   This 
  reason 
  for 
  the 
  non-success 
  that 
  often 
  attends 
  spraying 
  against 
  

   the 
  first 
  generation, 
  does 
  not 
  operate 
  so 
  largely 
  in 
  the 
  case 
  of 
  the 
  second. 
  

   Bad 
  weather 
  may 
  not 
  only 
  delay 
  spraying 
  until 
  the 
  proper 
  date 
  has 
  

   passed, 
  but 
  may 
  wash 
  away 
  a 
  correctly 
  apphed 
  insecticide. 
  When 
  

   conducting 
  experiments 
  the 
  following 
  points 
  should 
  be 
  remembered 
  : 
  

   The 
  marginal 
  rows 
  of 
  stocks 
  and 
  the 
  terminal 
  stocks 
  of 
  each 
  row 
  are 
  

   more 
  severely 
  infested 
  than 
  those 
  in 
  the 
  centre 
  of 
  the 
  vineyard, 
  and 
  

   in 
  a 
  very 
  irregular 
  manner 
  ; 
  the 
  diflerent 
  varieties 
  of 
  vines 
  are 
  not 
  

   attacked 
  in 
  the 
  same 
  degree, 
  in 
  the 
  Palatinate, 
  " 
  Riesling 
  " 
  suflers 
  

   more 
  than 
  "Sylvaner" 
  ; 
  the 
  moths 
  prefer 
  the 
  more 
  strongly 
  developed, 
  

   thicker- 
  and 
  darker-leaved 
  stocks 
  ; 
  taller 
  stocks 
  suffer 
  more 
  heavily 
  ; 
  

   vines 
  near 
  to 
  or 
  under 
  trees 
  are 
  irregularly 
  infested, 
  sometimes 
  more, 
  

   sometimes 
  less 
  than 
  other 
  vines. 
  The 
  care 
  with 
  which 
  spra3dng 
  is 
  

   conducted 
  materially 
  influences 
  results. 
  An 
  insecticide 
  may 
  be 
  non- 
  

   injurious 
  to 
  the 
  vine 
  one 
  year 
  and 
  do 
  damage 
  the 
  next. 
  

  

  These 
  factors 
  were 
  considered 
  in 
  the 
  present 
  experiments. 
  Spray- 
  

   ing 
  mostly 
  took 
  place 
  on 
  the 
  19th 
  and 
  20th 
  May, 
  1914. 
  To 
  gauge 
  

   the 
  efficacy 
  of 
  the 
  insecticides 
  correctly 
  the 
  living 
  larvae 
  only 
  were 
  

  

  