﻿538 
  

  

  P. 
  F. 
  Zur 
  chemischen 
  Bekampf 
  ung 
  des 
  Heu- 
  und 
  Sauerwurms 
  wahrend 
  

   1914. 
  [Chemical 
  control 
  of 
  both 
  generations 
  of 
  Clysia 
  ambiguella, 
  

   Hb., 
  during 
  1914.] 
  — 
  Luxemburger 
  Weinztg., 
  Grevenmacher, 
  ii, 
  

   no. 
  7, 
  1st 
  April 
  1914, 
  pp. 
  101-103, 
  

  

  The 
  encouraging 
  results 
  with 
  nicotin 
  spray 
  in 
  previous 
  years 
  have 
  led 
  

   to 
  this 
  method 
  being 
  largely 
  adopted 
  for 
  1914. 
  With 
  a 
  view 
  to 
  improv- 
  

   ing 
  the 
  technique, 
  experiments 
  are 
  being 
  made 
  on 
  a 
  total 
  area 
  of 
  3J 
  

   acres, 
  distributed 
  in 
  10 
  localities. 
  Seven 
  insecticides 
  are 
  being 
  tested, 
  

   including 
  a 
  10 
  per 
  cent, 
  tobacco 
  extract 
  for 
  which 
  three 
  formulae 
  are 
  

   given. 
  Dr. 
  Muth's 
  emulsion 
  (nicotin, 
  bisulphide 
  of 
  carbon, 
  petroleum- 
  

   soap) 
  of 
  which 
  1 
  part 
  in 
  20 
  of 
  water 
  is 
  employed 
  against 
  the 
  first 
  

   generation 
  of 
  Clysia, 
  and 
  1 
  part 
  in 
  40 
  of 
  water 
  against 
  the 
  second 
  

   generation 
  ; 
  and 
  the 
  weather-resisting 
  Schachenmiihl 
  nicotin, 
  which 
  

   costs 
  about 
  Is. 
  Id. 
  per 
  lb. 
  at 
  the 
  manufactory. 
  One 
  lb. 
  of 
  the 
  latter 
  

   is 
  used 
  with 
  10 
  gals, 
  of 
  1 
  per 
  cent. 
  Bordeaux 
  mixture, 
  and 
  no 
  grubs 
  

   were 
  seen 
  in 
  the 
  experimental 
  plots 
  where 
  this 
  insecticide 
  was 
  

   previously 
  used, 
  

  

  RoussEAux 
  (E.). 
  Le 
  Contrdle 
  des 
  Anticryptogamiques 
  et 
  des 
  Insecti- 
  

   cides. 
  [The 
  control 
  of 
  Fungicides 
  and 
  Insecticides.] 
  — 
  Jl. 
  d^Agric, 
  

   Prat, 
  Paris, 
  1914, 
  i, 
  no. 
  14, 
  2nd 
  April 
  1914, 
  pp, 
  431-433. 
  

  

  An 
  account 
  is 
  given 
  of 
  the 
  laws 
  enacted 
  in 
  France 
  to 
  prevent 
  fraud 
  

   and 
  misrepresentation 
  in 
  dealings 
  with 
  chemicals 
  used 
  as 
  fungicides 
  

   and 
  insecticides. 
  All 
  dealers 
  in 
  these 
  substances 
  must 
  declare 
  the 
  

   amount 
  of 
  copper 
  per 
  cent, 
  in 
  mixtures 
  containing 
  copper 
  compounds, 
  

   and 
  the 
  price 
  is 
  based 
  on 
  this 
  figure. 
  Samples 
  are 
  taken 
  in 
  the 
  presence 
  

   of 
  witnesses 
  ; 
  of 
  four 
  samples 
  taken 
  for 
  analysis 
  one 
  is 
  sent 
  to 
  the 
  

   buyer, 
  one 
  kept 
  in 
  the 
  analytical 
  laboratory, 
  and 
  two 
  at 
  the 
  manu- 
  

   facturer's 
  to 
  serve, 
  if 
  necessary, 
  for 
  further 
  analyses. 
  Other 
  enact- 
  

   ments 
  deal 
  with 
  the 
  precautions 
  necessary 
  to 
  obtain 
  samples, 
  as 
  far 
  as 
  

   possible 
  identical, 
  in 
  a 
  mixture 
  which 
  may 
  not 
  be 
  homogeneous 
  

   throughout. 
  

  

  ZscHOKKE 
  (K.). 
  Bericht 
  iiber 
  das 
  Auftreten 
  und 
  die 
  Bekampf 
  ung 
  von 
  

   Rebenschadlingen 
  in 
  der 
  Pfalz 
  im 
  Jahre 
  1913. 
  [Report 
  on 
  the 
  

   occurrence 
  and 
  control 
  of 
  vine 
  pests 
  in 
  the 
  Palatinate 
  in 
  1913.] 
  — 
  

   Weinbauder 
  Rheinpfalz, 
  Neustadt 
  a.d. 
  Haardt, 
  ii, 
  no. 
  8, 
  15th 
  April 
  

   1914, 
  pp. 
  86-90. 
  

  

  After 
  having 
  been 
  reduced 
  in 
  numbers 
  in 
  the 
  hot 
  summer 
  of 
  1911, 
  

   both 
  Clysia 
  ambiguella 
  and 
  Polychrosis 
  botrana 
  were 
  so 
  favoured 
  by 
  

   the 
  conditions 
  obtaining 
  in 
  1912 
  that 
  a 
  large 
  number 
  of 
  winter-pupae 
  

   developed 
  in 
  the 
  spring 
  of 
  1913. 
  After 
  the 
  first 
  flight 
  in 
  May 
  a 
  

   numerous 
  first 
  generation 
  of 
  caterpillars 
  appeared, 
  but 
  a 
  good 
  yield 
  

   of 
  grapes 
  would 
  still 
  have 
  been 
  possible 
  had 
  the 
  second 
  generation 
  not 
  

   been 
  very 
  abundant 
  and 
  favoured 
  by 
  the 
  slow 
  gro\\i:h 
  of 
  the 
  grapes. 
  

   Control 
  by 
  natural 
  enemies 
  again 
  fell 
  short 
  of 
  expectations. 
  Scratch- 
  

   brushing 
  and 
  earthing 
  up 
  the 
  stocks 
  gave 
  good 
  results 
  where 
  the 
  vine- 
  

   yards 
  were 
  isolated 
  ; 
  sticky 
  racquets 
  were 
  only 
  employed 
  in 
  one 
  

   instance 
  and 
  proved 
  a 
  success 
  ; 
  bait-traps 
  were 
  practically 
  abandoned 
  

   as 
  being 
  ineffective 
  and 
  costly, 
  and 
  sprays, 
  especially 
  of 
  tobacco- 
  

   extract, 
  were 
  chiefly 
  resorted 
  to. 
  This 
  was 
  made 
  up 
  of 
  1 
  lb. 
  soft 
  soap 
  

  

  