TABLE OF CONTENTS 



I *age 



Introduction 1 



Outline of the Bulletin 3 



Key for Determining Insect Injury to Sugar Beets: 



Explanation of Key 4 



The Key 5 



Colored Plates 11 



CHAPTER I 



Insects in General 29 



Structure 29 



Development 29 



The Egg 30 



The Larva 30 



The Pupa 30 



The Adult 30 



The Integument 30 



Classification 31 



Root Feeders 31 



Leaf Feeders 31 



Biting Insects 31 



Sucking Insects 31 



Methods of : Control 31 



Natural Methods 31 



Crop Rotation 31 



Plowing 32 



Late Planting 32 



Burning 32 



Clean Culture 32 



Artificial Methods — Insecticides 32 



Control of Biting Insects 32 



Control of Sucking Insects — Contact Poisons 33 



Repellents 33 



Sprayers 33 



Traction Sprayer 33 



Care of Sprayers 34 



Knapsack Sprayer 3t> 



Hand Sprayer 36 



Home-made Sprayer 37 



Paris'Green, Caution Regarding the Handling of 37 



