﻿EXPERIMENTS 
  FOR 
  CONTROL. 
  

  

  25 
  

  

  however, 
  an 
  effective, 
  convenient, 
  and 
  nonoffensive 
  spray, 
  and 
  the 
  

   cheapest 
  one 
  that 
  has 
  been 
  successfully 
  used 
  against 
  the 
  red 
  spider. 
  

  

  LYE-SULPHUR. 
  

  

  The 
  lye-sulphur 
  solution 
  (Formula 
  No. 
  1), 
  used 
  with 
  success 
  against 
  

   the 
  red 
  spider 
  on 
  the 
  almond 
  by 
  Mr. 
  W. 
  H. 
  Volck, 
  was 
  applied 
  with 
  

   flour 
  paste 
  and 
  with 
  cresol 
  soap 
  in 
  various 
  proportions. 
  The 
  results 
  

   of 
  these 
  experiments 
  (Table 
  VI) 
  were 
  obtained 
  from 
  tag 
  counts 
  and 
  

   are 
  very 
  promising. 
  

  

  The 
  lye-sulphur 
  solution, 
  used 
  with 
  either 
  the 
  cresol 
  soap 
  or 
  the 
  

   flour 
  paste, 
  was 
  very 
  effective, 
  and 
  when 
  used 
  in 
  the 
  proper 
  propor- 
  

   tions 
  did 
  not 
  injure 
  the 
  foliage 
  hi 
  the 
  least. 
  It 
  would 
  have 
  been 
  

   used 
  more 
  extensively 
  in 
  field 
  experiments 
  had 
  not 
  the 
  lye 
  been 
  

   disagreeable 
  to 
  handle 
  in 
  making 
  up 
  the 
  stock 
  solution. 
  The 
  lime- 
  

   sulphur 
  on 
  the 
  market 
  at 
  a 
  relatively 
  low 
  figure 
  proved 
  just 
  as 
  

   effective 
  as 
  the 
  lye-sulphur 
  and, 
  being 
  much 
  more 
  convenient, 
  was 
  

   preferred. 
  

  

  Table 
  VI. 
  — 
  Spraying 
  experiments 
  with 
  lye-sulphur 
  in 
  various 
  combinations 
  against 
  the 
  

  

  red 
  spider 
  on 
  hops. 
  

  

  No. 
  

  

  Date. 
  

  

  Material. 
  

  

  Applica- 
  

   tion. 
  

  

  Num- 
  

   ber 
  of 
  

   mites 
  

  

  Num- 
  

   ber 
  of 
  

   mites 
  

  

  Per 
  

  

  cent 
  of 
  

   mites 
  

  

  Cost 
  per 
  

  

  100 
  

   gallons. 
  

  

  Effect 
  on 
  vine. 
  

  

  

  

  

  

  present. 
  

  

  killed. 
  

  

  killed. 
  

  

  

  1 
  

  

  June 
  23 
  

  

  Lye-sulphur, 
  4-100; 
  cresol 
  

   soap, 
  1-300. 
  

  

  Thorough. 
  

  

  377 
  

  

  367 
  

  

  97.4 
  

  

  $1.05 
  

  

  Slight 
  injury. 
  

  

  2 
  

  

  June 
  26 
  

  

  Lye-sulphur, 
  2-100; 
  sul- 
  

   phur, 
  15 
  pounds 
  to 
  100 
  

   gallons; 
  flour 
  paste, 
  4-100. 
  

  

  ...do 
  

  

  374 
  

  

  366 
  

  

  97.8 
  

  

  .708 
  

  

  No 
  injury. 
  

  

  3 
  

  

  July 
  2 
  

  

  Lye-sulphur, 
  1-100; 
  sul- 
  

   phur, 
  15 
  pounds 
  to 
  100 
  

   gallons; 
  flourpaste, 
  4-100. 
  

  

  ...do 
  

  

  371 
  

  

  361 
  

  

  97.4 
  

  

  .55 
  

  

  Do. 
  

  

  4 
  

  

  July 
  15 
  

  

  Lye-sulphur, 
  1-100 
  

  

  ...do 
  

  

  518 
  

  

  458 
  

  

  88.5 
  

  

  .15 
  

  

  Do. 
  

  

  5 
  

  

  ...do.... 
  

  

  Lye-sulphur, 
  2-100 
  

  

  ...do 
  

  

  437 
  

  

  384 
  

  

  87.8 
  

  

  .31 
  

  

  Do. 
  

  

  Although 
  the 
  lime-sulphur, 
  or 
  lye-sulphur, 
  and 
  flour-paste 
  solution 
  

   did 
  not 
  injure 
  the 
  foliage 
  or 
  the 
  blossoms 
  of 
  the 
  hop 
  vines, 
  it 
  did 
  

   injure 
  the 
  more 
  tender 
  hop 
  cones. 
  The 
  late 
  spraying 
  with 
  lime- 
  

   sulphur, 
  if 
  practiced, 
  should 
  be 
  completed 
  before 
  the 
  hop 
  cones 
  come 
  

   out 
  from 
  the 
  burr. 
  

  

  NICOTINE 
  SOLUTIONS 
  AND 
  OTHER 
  MATERIALS. 
  

  

  The 
  nicotine 
  solutions, 
  used 
  with 
  the 
  lima-sulphur, 
  or 
  with 
  soap, 
  

   or 
  alone, 
  were 
  quite 
  expensive, 
  as 
  may 
  be 
  seen 
  in 
  Table 
  VII. 
  The 
  

   lime-sulphur 
  and 
  flour 
  paste 
  was 
  so 
  much 
  cheaper 
  and 
  so 
  effective 
  

   that 
  the 
  nicotine 
  experiments 
  which 
  had 
  been 
  outlined 
  were 
  conducted 
  

   on 
  a 
  small 
  scale 
  only. 
  The 
  results 
  of 
  these 
  experiments, 
  together 
  with 
  

   the 
  results 
  of 
  some 
  miscellaneous 
  experiments, 
  are 
  given 
  in 
  Table 
  VTI. 
  

  

  