INSECT PESTS AND THEIR CONTROL 259 



Southern Corn Root Worm 

 (Diabrotica duodecimpunctata). 1 



A — Beetle. B — Egg. C — Larva. D — Anal 



segment of larva. E — Work of larva at base of corn 



stalk. F — Pupa. All much enlarged except E, which 

 is reduced. 



two weeks after usual time 

 vent most of usual injury. 



U. S. Dept. Agri. Cir. 51, Office of 

 Secretary; Farm. Bull. 640. 



vented by late planting 

 and by the destruction of 

 volunteer wheat and oats 

 in the fall. 



Bur. Ent. Bull. 110. 

 The Hessian Fly 

 (Mayetiola destructor, 

 Say.). — This small two- 

 winged fly is one of the 

 most destructive insects 

 of growing wheat, causing 

 the plants to be stunted 

 and to break down near 

 harvest time. 



Treatment. — Burn the 

 stubble or plow it under 

 as soon after harvest as 

 possible. Destroy all 

 volunteer wheat just be- 

 fore sowing. Delay the 

 sowing until ten days or 

 The two latter precautions should pre- 



Cotton Boll Weevil 

 (Anthonomus grandis). 2 



A— Beetle, from above. B— Same from 

 side. About five times natural size. 



Tobacco Flea Beetle 

 (Epitrix parvitla). 3 



A — Adult beetle. B — Larva, side 

 view. C — Head of larva. D — Hind leg 

 of same. E — Anal segment of same. 

 F— Pupa. A, B, F— Enlarged about fif- 

 teen times. C, D, E — More enlarged. 



i Bur. Ent. BuU. 43. ! Farm. Bull. 344. ■ Bur. Ent. Cir. 123. 



