﻿40 
  THE 
  RED 
  SPIDER 
  ON 
  HOPS 
  IN 
  CALIFORNIA 
  

  

  Page. 
  

  

  Pea, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  sweet, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Peanut, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Pecan, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Pelargonium, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Pentilia 
  sp., 
  enemy 
  of 
  red 
  spiderl 
  19 
  

  

  Pepino. 
  (See 
  Solanum 
  muricatum.) 
  

  

  Pepper, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Persicaria 
  lapathifolia, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Phlox, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Pigweed, 
  rough. 
  (See 
  Amaranthus 
  retroflexus 
  .) 
  

  

  Poplar, 
  Carolina, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Privet, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Psylliodes 
  punctulata, 
  banding 
  of 
  hopvines 
  with 
  tanglefoot 
  in 
  control 
  28 
  

  

  Ptelea 
  trifoliata, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Pumpkin, 
  protection 
  from 
  red-spider 
  injury 
  35 
  

  

  Raspberry, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Red 
  spider, 
  adult, 
  description, 
  copulation, 
  parthenogenesis 
  12-13 
  

  

  bibliography 
  35-36 
  

  

  citrus. 
  (See 
  Tetranychus 
  mytilaspidis.) 
  

  

  control 
  experiments 
  on 
  hops 
  20-34 
  

  

  methods 
  of 
  experimentation 
  20 
  

  

  recommendations 
  on 
  hops 
  34 
  

  

  upon 
  plants 
  other 
  than 
  hops 
  and 
  cotton 
  34-35 
  

  

  cost 
  of 
  spraying 
  hopyards 
  30 
  

  

  cultural 
  methods 
  on 
  hops 
  30-34 
  

  

  damage 
  to 
  hops, 
  nature 
  17-18 
  

  

  distribution 
  in 
  the 
  field 
  18-19 
  

  

  economic 
  importance 
  on 
  hops 
  9-10 
  

  

  effect 
  upon 
  man 
  18 
  

  

  egg, 
  description, 
  location, 
  incubation 
  10 
  

  

  emergence 
  from 
  hibernation 
  15 
  

  

  enemies, 
  predaceous 
  19 
  

  

  first 
  appearance 
  on 
  hops 
  in 
  season 
  15 
  

  

  food 
  plants 
  16 
  

  

  habitation 
  on 
  hops 
  13 
  

  

  habits 
  13-16 
  

  

  hibernation 
  13 
  

  

  emergence 
  therefrom 
  15 
  

  

  larva, 
  descriptive, 
  length 
  of 
  stages 
  11 
  

  

  life 
  history 
  on 
  hops 
  10Vl2 
  

  

  locomotion 
  14-15 
  

  

  methods 
  of 
  applying 
  sprays 
  on 
  hops 
  29 
  

  

  migrating 
  activities 
  15-16 
  

  

  nymph, 
  descriptive, 
  length 
  of 
  stages 
  11 
  

  

  protection 
  on 
  hops 
  13 
  

  

  summary, 
  with 
  recommendations 
  for 
  control 
  34 
  

  

  Rose, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Roses, 
  greenhouse, 
  protection 
  from 
  red-spider 
  injury 
  35 
  

  

  protection 
  from 
  red-spider 
  injury 
  35 
  

  

  Rudbeckia 
  sp., 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Salvia, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  Sassafras, 
  ornamental, 
  food 
  plant 
  of 
  Tetranychus 
  bimaculatus 
  16 
  

  

  