﻿CONTENTS. 
  

  

  P 
  \GE, 
  

  

  Introductory 
  Note 
  '. 
  y 
  

  

  The 
  San 
  Jose 
  Scale 
  in 
  Illinois 
  : 
  1 
  

  

  Food 
  Plants 
  1 
  

  

  Injuries 
  by 
  the 
  Scale 
  2 
  

  

  Extension 
  of 
  Range 
  and 
  Diminution 
  of 
  Numbers 
  3 
  

  

  Origin 
  and 
  Disper&al 
  4 
  

  

  Discovery 
  in 
  Illinois 
  

  

  Inspection 
  of 
  Illinois 
  Orchards 
  7 
  

  

  Conditions 
  at 
  Infested 
  Localities 
  8 
  

  

  Disinfection 
  of 
  Quincy 
  Orchard 
  12 
  

  

  Description 
  j5, 
  

  

  Life 
  History 
  17 
  

  

  Natural 
  Checks 
  on 
  Multiplication 
  , 
  18 
  

  

  Climatic 
  Checks 
  19 
  

  

  Entomological 
  Enemies 
  19 
  

  

  Fungus 
  Diseases 
  22 
  

  

  Precautionary 
  and 
  Remedial 
  Measures 
  23 
  

  

  Field 
  Observations 
  on 
  the 
  White 
  Grubs 
  26 
  

  

  Outline 
  of 
  History 
  of 
  Christian 
  County 
  Fields 
  Infested 
  by 
  White 
  Grubs 
  during 
  Sum- 
  

   mer 
  of 
  1&95 
  29 
  

  

  Injuries 
  to 
  Different 
  Crops 
  31 
  

  

  Relations 
  of 
  Injury 
  to 
  Agricultural 
  History 
  of 
  Land 
  31 
  

  

  Clover 
  and 
  White-Grub 
  Injury 
  32 
  

  

  Injuries 
  as 
  affected 
  by 
  Soil 
  and 
  Situation 
  32 
  

  

  Species 
  of 
  Grubs 
  concerned 
  33 
  

  

  Life 
  History 
  33 
  

  

  Prevention 
  and 
  Remedy 
  34 
  

  

  Midsummer 
  Measures 
  against 
  the 
  Chinch-bug. 
  35 
  

  

  Experimental 
  Details 
  38 
  

  

  The 
  Georgetown 
  Campaign 
  40 
  

  

  Kansas 
  Method 
  44 
  

  

  Experiment 
  with 
  Kerosene 
  and 
  Salt 
  and 
  other 
  Repellants 
  43 
  

  

  A 
  Study 
  of 
  the 
  Causes 
  of 
  the 
  Disappearance 
  of 
  a 
  Chinch-bug 
  Outbreak 
  45 
  

  

  The 
  District 
  as 
  a 
  Whole 
  50 
  

  

  Summary 
  Statement 
  for. 
  each 
  Observing 
  Station 
  51 
  

  

  Field 
  and 
  Laboratory 
  Notes 
  in 
  Detail 
  55 
  

  

  Tamaroa, 
  Perry 
  County 
  55 
  

  

  Odin, 
  Marion 
  County 
  gO 
  

  

  Edgewood, 
  Effingham 
  County 
  64 
  

  

  Mattoon, 
  Coles 
  County 
  -. 
  57 
  

  

  Champaign 
  County, 
  Crbana 
  6!> 
  

  

  Champaign 
  County, 
  Mahomet 
  71 
  

  

  Economic 
  Conclusion 
  74 
  

  

  