Table of Contents 



CHAPTER II 



Page 



Root Feeders 38 



A. Biting Root Feeders 38 



1 . Cutworms 38 



a. Western Army Cutworm 41 



b. Pale Western Cutworm 45 



c. Variegated Cutworm 47 



2. White Grubs 48 



3 . Wireworms 52 



B. Sucking Root Feeders 55 



1 . Sugar Beet Root-louse 55 



2. Sugar Beet Nematode 59 



3. Root-knot Nematode or Gallworm 64 



CHAPTER III 



Leaf Feeders 67 



A. Biting Leaf Feeders 67 



1 . Leaf-eating Caterpillars 67 



a. Sugar Beet Webworm 67 



b. True Army Worm 78 



c. Alfalfa Looper 81 



d. Alfalfa Webworm 84 



e. Yellow-bear Caterpillar 86 



f. Zebra Caterpillar 87 



2. Leaf-eating Beetles 88 



a. Larger Sugar Beet Leaf-beetle or Alkali-beetle 89 



b. Western Beet Leaf-beetle 90 



c. Flea-beetles. 91 



c-1. Banded Flea-beetle 92 



c-2. Potato Flea-beetle 93 



c-3. Three-spotted Flea-beetle 93 



d. Spinach Carrion-beetle 94 



e. Blister-beetles 96 



3 . Grasshoppers 98 



a. Two-lined Hopper 100 



b. Differential Hopper 100 



c. Red-legged Locust 100 



4. Field Crickets 109 



5 . Leaf-miners 110 



a. Beet or Spinach Leaf-miner 110 



iv 



