DIV.INSECTS 
UNITED STATES DEPARTMENT OF AGRICULTURE 
FARMERS’ 
BULLETIN 
WasuineTon, D. C. ress | May 23, 1916 
Contribution from the Bureau of Entemology, L. O. Howard, Chief. 
THE TRUE ARMY WORM' AND ITS CONTROL. 
By W. R. Watton, Entomological Assistant, Cereal and Iorage Insect 
Investigations. 
INTRODUCTION. 
This publication is designed to convey to the farmer, in a brief and 
simple manner, the natural history of the true army worm, a caterpil- 
ic. 1.—The true army worm: Full-grown larva or eaterpillar. Enlarged. 
(Original. ) 
lar which from time to time becomes enormously destructive to grow- 
ing cereals, and sometimes to forage crops; to give him a summary 
of the information necessary for its control; and especially to urge 
upon him the necessity for constant vigilance in the combat with 
this insect. 
The true army worm (fig. 1) is often confused in the public mind 
with the fall army worm,’ “ overflow worm,” or “ grass worm” as 
1 (Heliophila) Oirphis unipuncta Haw. ; order Lepidoptera, family Noctuidae. 
2 Laphygma frugiperda S§. & A, 
Notr.—This bulletin is of general interest to crop growers everywhere, and especially 
east of the Rocky Mountains. 
34940°—Bull. 731—16 
