﻿VI 
  DECIDUOUS 
  FRUIT 
  INSECTS 
  AND 
  INSECTICIDES. 
  

  

  Page, 
  

   Plate 
  X. 
  Fig. 
  1. 
  — 
  Cherry 
  blossom 
  clusters 
  at 
  stage 
  of 
  development 
  when 
  most 
  

  

  of 
  the 
  eggs 
  of 
  the 
  cherry 
  fruit 
  sawfly 
  are 
  being 
  deposited. 
  Fig. 
  

  

  2. 
  — 
  Larvae 
  and 
  cocoons 
  of 
  the 
  cherry 
  fruit 
  sawfly 
  76 
  

  

  XI. 
  Fig. 
  1. 
  — 
  Sprayed 
  twig 
  of 
  wild 
  cheny 
  showing 
  larvae 
  of 
  the 
  fall 
  web- 
  

   worm 
  (Hyphantria 
  cunea) 
  feeding 
  on 
  leaves; 
  at 
  right, 
  same, 
  covered 
  

   with 
  paper 
  bag, 
  to 
  prevent 
  escape 
  of 
  larvae. 
  Fig. 
  2. 
  — 
  Unsprayed 
  

   twig 
  of 
  wild 
  cherry 
  upon 
  which 
  fall 
  webworms 
  have 
  been 
  feeding 
  

  

  for 
  some 
  time; 
  for 
  comparison 
  with 
  sprayed 
  twig 
  84 
  

  

  XII. 
  Stages 
  and 
  work 
  of 
  the 
  fruit-tree 
  leaf-roller 
  (Archips 
  argyrospila). 
  

   Fig. 
  1. 
  — 
  Hatched 
  egg 
  masses 
  on 
  apple 
  twigs. 
  Fig. 
  2. 
  — 
  Full 
  grown 
  

   larva. 
  Fig. 
  3. 
  — 
  Pupae. 
  Fig. 
  4. 
  — 
  Cocoon 
  and 
  pupal 
  case. 
  Fig. 
  

   5. 
  — 
  Young 
  apples 
  injured 
  by 
  larvae 
  94 
  

  

  XIII. 
  Work 
  of 
  the 
  fruit-tree 
  leaf-roller. 
  Fig. 
  1. 
  — 
  Apple 
  branch, 
  showing 
  

  

  webbing 
  and 
  injury 
  to 
  foliage 
  by 
  larvae. 
  Fig. 
  2. 
  — 
  Apples 
  injured 
  

  

  by 
  larvae 
  94 
  

  

  XIV. 
  Apple 
  orchard 
  at 
  Canon 
  City, 
  Colo., 
  defoliated 
  by 
  the 
  fruit-tree 
  leaf- 
  

  

  roller 
  94 
  

  

  XV. 
  Excessive 
  webbing 
  by 
  larvae 
  of 
  the 
  fruit-tree 
  leaf 
  -roller 
  94 
  

  

  XVI. 
  Stages 
  of 
  the 
  fruit-tree 
  leaf 
  -roller. 
  Fig. 
  1. 
  — 
  Egg 
  masses 
  on 
  trunk 
  of 
  

   apple 
  tree. 
  Fig. 
  2. 
  — 
  Moth 
  and 
  extruded 
  pupal 
  case. 
  Fig. 
  3. 
  — 
  

   Unhatched 
  egg 
  masses 
  on 
  apple 
  twigs 
  98 
  

  

  TEXT 
  FIGURES. 
  

  

  Fig. 
  1. 
  The 
  grape 
  leaf 
  hopper 
  (Typhlocyba 
  comes 
  var. 
  coloradensis): 
  Adult 
  1 
  

  

  2. 
  The 
  grape 
  leafhopper: 
  Nymph 
  of 
  the 
  first 
  stage 
  2 
  

  

  3. 
  The 
  grape 
  leafhopper: 
  Fully 
  developed 
  nymph 
  of 
  the 
  fifth 
  stage 
  2 
  

  

  4. 
  Map 
  showing 
  distribution 
  of 
  the 
  grape-berry 
  moth 
  (Polychrosis 
  viteana) 
  . 
  . 
  20 
  

  

  5. 
  Injury 
  to 
  grape 
  cluster 
  by 
  larva 
  of 
  grape-berry 
  moth 
  during 
  and 
  just 
  

  

  after 
  the 
  blooming 
  period 
  24 
  

  

  6. 
  Pupal 
  cases 
  made 
  on 
  grape 
  leaf 
  by 
  full-grown 
  larvae 
  of 
  the 
  first 
  brood 
  of 
  

  

  the 
  grape-berry 
  moth 
  24 
  

  

  7. 
  Cluster 
  of 
  Concord 
  grapes 
  on 
  which 
  many 
  second-brood 
  eggs 
  of 
  the 
  grape- 
  

  

  berry 
  moth 
  are 
  present 
  25 
  

  

  8. 
  The 
  grape 
  curculio 
  (Craponius 
  in&qualis): 
  Adult, 
  larva, 
  pupa 
  26 
  

  

  9. 
  Work 
  of 
  the 
  grape 
  curculio 
  in 
  berry 
  of 
  grape 
  27 
  

  

  10. 
  Diagram 
  showing 
  time 
  of 
  emergence 
  of 
  spring-brood 
  moths 
  of 
  the 
  grape- 
  

  

  berry 
  moth 
  in 
  1909 
  at 
  North 
  East, 
  Pa 
  30 
  

  

  11. 
  Diagram 
  showing 
  time 
  of 
  emergence 
  of 
  the 
  first-brood 
  moths 
  of 
  the 
  grape- 
  

  

  berry 
  moth 
  in 
  1909 
  at 
  North 
  East, 
  Pa 
  35 
  

  

  12. 
  Diagram 
  showing 
  time 
  of 
  leaving 
  the 
  grape 
  berries 
  by 
  second-brood 
  

  

  larvae 
  of 
  the 
  grape-berry 
  moth, 
  from 
  fruit 
  collected 
  in 
  the 
  field, 
  North 
  

   East, 
  Pa., 
  1909 
  40 
  

  

  13. 
  Diagram 
  showing 
  time 
  of 
  emergence 
  of 
  the 
  first-brood 
  moths 
  of 
  the 
  grape- 
  

  

  berry 
  moth 
  in 
  1907 
  at 
  North 
  East, 
  Pa 
  42 
  

  

  14. 
  Diagram 
  showing 
  time 
  of 
  emergence 
  of 
  the 
  spring-brood 
  moths 
  of 
  the 
  

  

  grape-berry 
  moth 
  in 
  1908 
  at 
  North 
  East, 
  Pa 
  43 
  

  

  15. 
  Seasonal 
  history 
  of 
  the 
  grape-berry 
  moth 
  as 
  observed 
  in 
  1909 
  at 
  North 
  

  

  East, 
  Pa 
  45 
  

  

  16. 
  Thymaris 
  sling 
  erlandana, 
  a 
  common 
  parasite 
  of 
  the 
  grape-berry 
  moth. 
  . 
  . 
  46 
  

  

  17. 
  Vineyard 
  in 
  which 
  poison-spray 
  experiments 
  were 
  conducted 
  against 
  

  

  larvae 
  of 
  the 
  grape-berry 
  moth 
  during 
  the 
  seasons 
  of 
  1907, 
  1908, 
  and 
  

  

  1 
  909 
  ; 
  vineyard 
  of 
  Mr. 
  W. 
  S. 
  Wheeler, 
  North 
  East, 
  Pa 
  53 
  

  

  