﻿EXPERIMENTS 
  FOR 
  CONTROL. 
  

  

  23 
  

  

  mixture 
  spread 
  more 
  rapidly 
  than 
  the 
  straight 
  solutions, 
  but 
  did 
  not 
  

   prove 
  entirely 
  satisfactory. 
  

  

  While 
  applying 
  a 
  spray 
  composed 
  of 
  lye-sulphur, 
  flowers 
  of 
  sul- 
  

   phur, 
  and 
  flour 
  paste, 
  it 
  was 
  observed 
  that 
  the 
  material 
  spread 
  over 
  

   the 
  leaves 
  very 
  rapidly. 
  This 
  flour 
  paste 
  seemed 
  to 
  meet 
  the 
  demand 
  

   for 
  a 
  " 
  spreader" 
  and 
  was 
  accordingly 
  mixed 
  with 
  the 
  lime-sulphur 
  

   solutions. 
  The 
  result 
  was 
  a 
  smooth 
  mixture, 
  without 
  precipitate, 
  

   which 
  spread 
  over 
  the 
  leaves 
  in 
  a 
  most 
  effective 
  manner 
  (PL 
  V, 
  fig. 
  2) 
  

   and 
  gave 
  unusually 
  effective 
  results 
  as 
  an 
  insecticide. 
  The 
  proper 
  

   proportions 
  were 
  found, 
  on 
  experimentation, 
  to 
  be 
  4 
  gallons 
  of 
  flour 
  

   paste 
  (4 
  pounds 
  of 
  flour) 
  to 
  100 
  gallons 
  of 
  spray. 
  

  

  Lime-sulphur 
  and 
  flour 
  paste 
  proved 
  a 
  very 
  effective 
  and 
  rela- 
  

   tively 
  cheap 
  spray 
  for 
  use 
  against 
  the 
  red 
  spider 
  and 
  was 
  extensively 
  

   used 
  in 
  the 
  control 
  work 
  carried 
  on 
  in 
  the 
  Sacramento 
  Valley 
  in 
  1911. 
  

  

  Table 
  IV. 
  — 
  Spraying 
  experiments 
  with 
  lime-sulphur 
  solutions 
  against 
  the 
  red 
  spider 
  

  

  on 
  hops. 
  

  

  

  

  

  

  

  en 
  

  

  en 
  

   & 
  

  

  en' 
  i 
  _J 
  

  

  3^g 
  

  

  ~S 
  

  

  

  

  

  

  

  

  

  

  

  •rl 
  en 
  .It 
  

  

  bo 
  

  

  

  

  

  

  

  

  'a 
  . 
  

  

  a 
  

  

  a 
  

  

  SutS 
  

  

  o 
  

  

  

  1 
  

  

  No. 
  

  

  Date. 
  

  

  Material. 
  

  

  Applica- 
  

   tion. 
  

  

  °1 
  

  

  33 
  

  

  IS 
  

  

  

  o 
  

  

  1—1 
  en 
  

  

  srl 
  

  

  

  a 
  

  

  o 
  

  

  

  

  

  

  a 
  

  

  3 
  

  

  a 
  

  

  

  

  

  

  4^ 
  

  

  en 
  

  

  o 
  

  

  a 
  

  

  o 
  

  

  o 
  

  

  

  

  

  

  & 
  

  

  & 
  

  

  dn 
  

  

  Ph 
  

  

  ■ 
  O 
  

  

  o 
  

  

  W 
  

  

  1 
  

  

  June 
  23 
  

  

  Lime-sulphur, 
  36° 
  Baume, 
  

  

  1-75 
  i. 
  

   Lime-sulphur, 
  30° 
  Baume, 
  

  

  Thorough 
  . 
  

  

  3G0 
  

  

  135 
  

  

  37.5 
  

  

  

  SO. 
  26 
  

  

  Tag. 
  

  

  None. 
  

  

  o 
  

  

  27 
  

  

  ...do 
  

  

  698 
  

  

  692 
  

  

  99.0 
  

  

  

  .35 
  

  

  ...do. 
  

  

  Do. 
  

  

  

  

  1-75; 
  flour 
  paste, 
  4-100. 
  

  

  

  

  

  

  

  

  

  

  3 
  

  

  July 
  1 
  

  

  Lime-sulphur, 
  36 
  d 
  Baume, 
  

   1-50; 
  flour 
  paste, 
  4-100. 
  

  

  ...do 
  

  

  697 
  

  

  091 
  

  

  99.0 
  

  

  

  .49 
  

  

  ...do. 
  

  

  Slight 
  in- 
  

   jury. 
  

  

  4 
  

  

  5 
  

  

  Lime-sulphur, 
  30° 
  Baume, 
  

   1-60; 
  flour 
  paste, 
  4-100. 
  

  

  ...do 
  

  

  904 
  

  

  945 
  

  

  98.1 
  

  

  

  .51 
  

  

  ...do. 
  

  

  Do. 
  

  

  5 
  

  

  6 
  

  

  Lime-sulphur, 
  30° 
  Baume, 
  

   1-86; 
  flour 
  paste, 
  4-100. 
  

  

  ...do 
  

  

  593 
  

  

  534 
  

  

  90.0 
  

  

  97.1 
  

  

  .32 
  

  

  ...do. 
  

  

  None. 
  

  

  6 
  

  

  6 
  

  

  Lime-sulphur, 
  30° 
  Baume, 
  

   1-86; 
  flour 
  paste, 
  4-100. 
  

  

  ...do 
  

  

  593 
  

  

  580 
  

  

  98.8 
  

  

  

  .32 
  

  

  Field 
  

  

  Do. 
  

  

  7 
  

  

  9 
  

  

  Lime-sulphur, 
  3(i° 
  Baume, 
  

   1-100; 
  flour 
  paste. 
  4-100. 
  

  

  ...do 
  

  

  906 
  

  

  892 
  

  

  98.4 
  

  

  

  .29 
  

  

  Tag. 
  

  

  Do. 
  

  

  8 
  

  

  19 
  

  

  Lime-sulphur, 
  33° 
  Baume, 
  

   1-70; 
  flour 
  paste, 
  4-100. 
  

  

  ...do 
  

  

  143 
  

  

  142 
  

  

  99.7 
  

  

  99.7 
  

  

  .38 
  

  

  ...do. 
  

  

  Do. 
  

  

  9 
  

  

  19 
  

  

  Lime-sulphur, 
  33° 
  Baume, 
  

   1-70; 
  flour 
  paste, 
  4-100. 
  

  

  ...do 
  

  

  509 
  

  

  440 
  

  

  80.4 
  

  

  92.9 
  

  

  .38 
  

  

  Field 
  

  

  Do. 
  

  

  10 
  

  

  19 
  

  

  Lime-sulphur, 
  33° 
  Baume, 
  

   1 
  70; 
  flour 
  paste, 
  4-100. 
  

  

  Careless 
  . 
  . 
  . 
  

  

  509 
  

  

  55 
  

  

  10.8 
  

  

  

  .38 
  

  

  ...do. 
  

  

  Do. 
  

  

  1 
  The 
  terms 
  "lime-sulphur, 
  1-75," 
  " 
  flour 
  paste, 
  4-100," 
  etc., 
  denote 
  1 
  gallon 
  of 
  lime-sulphur 
  to 
  75 
  gallons 
  

   of 
  water, 
  4 
  gallons 
  of 
  Bour 
  paste 
  to 
  LOO 
  gallons 
  of 
  water, 
  ete. 
  

  

  NOTE. 
  The 
  amount 
  of 
  material 
  necessary 
  per 
  acre 
  varies 
  from 
  300 
  gallons 
  in 
  light 
  foliated 
  hops 
  to 
  500 
  

   gallons 
  in 
  heavy 
  foliaged 
  hops. 
  

  

  Table 
  IV 
  gives 
  an 
  accurate 
  conception 
  of 
  the 
  efficiency 
  of 
  the 
  lime- 
  

   sulphur-and-flour-paste 
  spray. 
  The 
  percentages 
  obtained 
  in 
  Nos. 
  1 
  

   and 
  2 
  of 
  this 
  (.able 
  represent 
  graphically 
  the 
  relative 
  efficiency 
  of 
  lime- 
  

   sulphur 
  solutions 
  with 
  and 
  without 
  the 
  Hour 
  paste. 
  A 
  great 
  differ- 
  

   ence 
  in 
  the 
  percentage 
  is 
  again 
  noted 
  in 
  Nos. 
  9 
  and 
  10. 
  In 
  No. 
  9 
  the 
  

   materia] 
  was 
  thoroughly 
  applied 
  and 
  in 
  No. 
  10 
  applied 
  very 
  care- 
  

   lessly. 
  The 
  lower 
  percentages 
  obtained 
  late 
  in 
  the 
  season 
  as 
  compared 
  

   with 
  the 
  hiigher 
  percentages 
  secured 
  earlier 
  in 
  the 
  season 
  are 
  due 
  to 
  

  

  