9G 



MANUAL OF VEGETABLE-GARDEN INSECTS 



hatch in about a week and tlic hir\'a' begin feeding on the 

 leaves. The young larva is about yV i'^^^'l^ i^^ length, dull gray, 

 with the thoracic shield and the areas at the base of the tubercles 

 dark brown. The larva becomes full-grown in nine or ten 

 days. It is then about f inch in length, dark olive brown with 

 the tubercles pale yellow. The larva? enter the ground for 

 pupation and the beetles emerge a few days later. There are 

 two generations annually. 



It has been observed in Colorado that the insect is most 

 troublesome on beets grown on or near alkali ground. 



References 



U. S. Div. Ent. Bull. 40, pp. 111-113. 1903. 

 Gillette, Rept. State Ent. Col., pp. 8-11. 1903. 



The Western Beet Leaf-Beetle 



Monoxia consputa Leconte 



This leaf-beetle ranges from California and Oregon east to 

 the Dakotas and Kansas. It has been 

 reported as injurious to beets and sugar- 

 beets in California and Oregon. Both 

 larvae and adults feed on the leaves, 

 leaving only the larger veins. The 

 beetle (Fig. 64) is nearly -J- inch in 

 length, yellowish brown; the wing- 

 covers are sometimes marked with 

 small scattered black spots often 

 arranged in rows. 



The beet leaf-beetles can be con- 

 trolled by thoroughly spraying the plants with arsenate of 

 lead (paste), 5 or G pounds in 100 gallons of water. 



Fig. 64. — The western 

 beet leaf-beetle (X 5^). 



