﻿CONTENTS. 
  

  

  Page. 
  

  

  Introduction 
  9 
  

  

  Economic 
  importance 
  ; 
  9 
  

  

  Life 
  history 
  , 
  10 
  

  

  The 
  egg 
  10 
  

  

  Description 
  10 
  

  

  Where 
  laid 
  10 
  

  

  Incubation 
  10 
  

  

  The 
  larva 
  and 
  nymph 
  11 
  

  

  Descriptive 
  11 
  

  

  Length 
  of 
  stages 
  11 
  

  

  The 
  adult 
  12 
  

  

  Description 
  12 
  

  

  Copulation 
  12 
  

  

  Parthenogenesis 
  12 
  

  

  Habits 
  13 
  

  

  Habitation 
  13 
  

  

  Protection 
  13 
  

  

  Hibernation 
  13 
  

  

  Locomotion 
  14 
  

  

  Emergence 
  from 
  hibernation 
  15 
  

  

  First 
  appearance 
  of 
  mites 
  on 
  hops 
  15 
  

  

  Migratory 
  activities 
  15 
  

  

  Food 
  plants 
  16 
  

  

  Nature 
  of 
  damage 
  17 
  

  

  General 
  effect 
  of 
  mites 
  upon 
  foliage 
  17 
  

  

  Relative 
  effect 
  of 
  mites 
  upon 
  male 
  and 
  female 
  hopvines 
  17 
  

  

  Effect 
  upon 
  the 
  quality 
  of 
  the 
  hops 
  17 
  

  

  Effect 
  upon 
  man 
  18 
  

  

  Distribution 
  in 
  the 
  field 
  18 
  

  

  Predaceous 
  enemies 
  19 
  

  

  Experiments 
  for 
  the 
  control 
  of 
  the 
  red 
  spider 
  20 
  

  

  Methods 
  of 
  experimentation 
  20 
  

  

  Tag 
  counts 
  20 
  

  

  Field 
  counts 
  20 
  

  

  Sulphur 
  20 
  

  

  Reason 
  for 
  inefficiency 
  22 
  

  

  Lime-sulphur 
  solutions 
  22 
  

  

  Flour 
  paste 
  24 
  

  

  Lye-sulphur 
  25 
  

  

  Nicotine 
  solutions 
  and 
  other 
  materials 
  25 
  

  

  Pure 
  water 
  26 
  

  

  Value 
  of 
  second 
  application 
  L'<> 
  

  

  Formulas 
  for 
  sprays 
  27 
  

  

  Banding 
  with 
  tanglefoot 
  28 
  

  

  Application 
  28 
  

  

  Methods 
  of 
  applying 
  spraye 
  LM) 
  

  

  Cost 
  of 
  spraying 
  30 
  

  

  5 
  

  

  