INSECT PESTS AND THEIR CONTROL 259 



SOUTHERN CORN ROOT WORM 

 (Diabrotica duodecimpunctatd). 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- 



A B 



COTTON BOLL WEEVIL 

 (Anthonomus grandis). 2 



A Beetle, from above. B Same from 

 side. About five times natural size. 



TOBACCO FLEA BEETLE 

 (Epitrix parvula). 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. 



Bur. Ent. Bull. 43. 



Farm. Bull. 344. 



1 Bur. Ent. Cir. 123. 



