Introduction 



** Damage usually occurring during midsummer or later. 



Damage most severe on wet alkali land or near such 

 land. Tender portion of leaf eaten, only a net- 

 work of veins remaining, which soon become dry 

 and brown. 



Look for Alkali-beetles (pages 89-90). 



00 Damage usually most severe at borders of fieldjiear 

 wild land, waste land, ditch banks and fence rows 

 where grasshoppers are numerous, or near alflafa 

 or waste land overrun with sweet clover, or near 

 grain fields. 



Look for: Grasshoppers (pages 98-109); 



Alfalfa Loopers (pages 81- 

 84); 



Western Army Cutworms 

 (pages 41-45). 



000 Damage usually slight, only a beet leaf here and 

 there being eaten. Not confined to border, but 

 occurring throughout entire field. 



Look for : Yellow-bear Caterpillars (pages 

 86-87) ; 



Zebra Caterpillars (pages 87-88) ; 

 Variegated Cutworms (pages 47-48). 



D. Leaves very much curled and distorted. Veins much enlarged, 

 often bearing cone-shaped points (Figure 5, Plate VIII, Page 

 25). Root small and stunted. Rootlets abnormally de- 

 veloped (Figure 7, Page 60). Crown often covered with a 

 sticky syrup-like substance. Curly-top (pages 124-125). 



Look for Sugar Beet Leaf-hoppers (Pages 

 123-126). 



