﻿ILLUSTRATIONS. 
  

  

  PLATES. 
  

  

  Page. 
  

   Plate 
  I. 
  Fig. 
  1. 
  — 
  Fallen 
  hopvine, 
  showing 
  characteristic 
  silvery 
  web 
  and 
  

   clusters 
  of 
  red 
  spiders 
  {Tetranychus 
  bimaculatus) 
  . 
  Fig. 
  2. 
  — 
  Fallen 
  

   hopvines, 
  showing 
  silvery 
  web, 
  on 
  which 
  red 
  spiders 
  are 
  clustered 
  . 
  . 
  16 
  

   II. 
  Fig. 
  1. 
  — 
  Male 
  hopvine 
  injured 
  by 
  the 
  red 
  spider. 
  Fig. 
  2. 
  — 
  Male 
  hop- 
  

   vine 
  uninjured 
  by 
  the 
  red 
  spider 
  16 
  

  

  III. 
  Fig. 
  1. 
  — 
  Spraying 
  hopvines 
  with 
  power 
  outfit 
  for 
  the 
  red 
  spider. 
  

  

  Fig. 
  2. 
  — 
  Applying 
  precipitated 
  sulphur 
  in 
  dust 
  form 
  as 
  a 
  remedy 
  

   against 
  the 
  red 
  spider 
  20 
  

  

  IV. 
  Fig. 
  1. 
  — 
  Sweet 
  peas 
  infested 
  by 
  the 
  red 
  spider, 
  but 
  protected 
  by 
  

  

  dusting, 
  at 
  intervals 
  of 
  one 
  week, 
  with 
  precipitated 
  sulphur. 
  

   Fig. 
  2. 
  — 
  Sweet 
  peas, 
  growth 
  aborted, 
  blossoms 
  indifferent, 
  and 
  vines 
  

  

  nearly 
  killed 
  by 
  the 
  red 
  spider 
  20 
  

  

  V. 
  Fig. 
  1. 
  — 
  Comparison 
  of 
  healthy 
  hops 
  with 
  those 
  infested 
  by 
  the 
  red 
  

   spider. 
  Fig. 
  2. 
  — 
  Leaf 
  of 
  hop, 
  the 
  left 
  half 
  of 
  which 
  was 
  sprayed 
  

   with 
  lime-sulphur 
  and 
  flour 
  paste 
  and 
  the 
  right 
  half 
  with 
  lime- 
  

   sulphur 
  alone 
  24 
  

  

  VI. 
  Fig. 
  1. 
  — 
  Cooking 
  flour 
  paste 
  out 
  of 
  doors. 
  Fig. 
  2. 
  — 
  Large 
  power 
  

  

  spraying 
  outfit, 
  showing 
  lines 
  of 
  hose 
  running 
  into 
  hopyard 
  28 
  

  

  TEXT 
  FIGURES. 
  

  

  Fig. 
  1. 
  The 
  red 
  spider 
  ( 
  Tetranychus 
  bimaculatus): 
  Egg 
  10 
  

  

  2. 
  The 
  red 
  spider: 
  Larva 
  11 
  

  

  3. 
  The 
  red 
  spider: 
  Adult 
  female 
  12 
  

  

  4. 
  The 
  red 
  spider: 
  Adult 
  male 
  1 
  2 
  

  

  5. 
  Track 
  of 
  a 
  red 
  spider 
  on 
  blotter 
  14 
  

  

  6. 
  Hopvines 
  banded 
  with 
  tanglefoot 
  in 
  an 
  attempt 
  to 
  prevent 
  the 
  miles 
  

  

  from 
  ascending 
  28 
  

  

  7. 
  Hopvine 
  tied 
  high 
  and 
  not 
  stripped; 
  lower 
  leaves 
  difficult 
  to 
  spray 
  31 
  

  

  8. 
  Hopvine 
  tied 
  high 
  and 
  stripped; 
  lower 
  leaves 
  matted 
  and 
  difficult 
  to 
  

  

  spray 
  32 
  

  

  9. 
  Hopvine 
  tied 
  low 
  and 
  stripped; 
  leaves 
  readily 
  sprayed 
  33 
  

  

  74955°— 
  Bull. 
  117—13 
  2 
  7 
  

  

  