THE EUROPEAN CORN BORER! AND ITS 
CONTROL. 
D. J. Carrrey, Assistant in Charge, Corn-Borer Investigations, and L. H. 
WortHtey, Hxpert in Charge, Corn-Borer Control, Bureau of Entomology. — 
CONTENTS. 
Page. - Page. 
A pest of prime importance________ 1 | Preventing the spread of the insect__ 32 
History of the insect in the United Penalty for violation of plant quar- 
SUG a a le re 2 SMILING! ACE tee be. ieee oda eee seb 34 
Distribution in North America_____ 2 | Artificial carriers other than quar- 
Probable method of introduction____ 4 ANENEG VOlLANtSs2 = os | alee, ee 34. 
Plants attacked by the insect in this Control of European corn borer_____ 35 
COMME Peres yaa eee eet ee bb 4 Ineffective measures_________- | 35 
Character of injury ‘to: corne__-_—2== 6 Methods of control effective un- 
Character of injury to plants other der restricted conditions ____ 36 
ihe Ca ee eS ee 11 Protecting greenhouse plants___ 38 
Mxtent of injury to: corm 2-) 2 = 11 Methods recommended in market 
Extent of injury to vegetables, flow- epehet (Sor: 5 aOR a. 38 
ers, and field crops other than General methods of suppression 
CORD ee Re ee ee, 16 and Mon trol 2 oP FS a 39 
Seasonal history and habits________ 21 | Summary of control and restrictive 
Naira enemieg = 2 see oo es 26 MEASTE CSE Seen. = ee em 43 
Insects frequently mistaken for the 
Huropean ‘corn borer__—_=— —~ ——_—_ PAT 
A PEST OF PRIME IMPORTANCE. 
i eee EUROPEAN CORN BORER, the injurious stage of which 
is the young, or caterpillar, of a small moth, has become firmly 
established in the northeastern United States and in Ontario, prob- 
ably having gained entrance in 1909 and 1910 in broom corn imported 
from Hungary and Italy. The results of four years of investigation 
by the Bureau of Entomology of this department leave no room 
for doubt that this insect constitutes a corn pest of prime impor- 
tance. In addition, it attacks a large variety of useful and orna- 
mental plants as well as grasses and weeds, and this increases its 
destructiveness and adds greatly to the difficulty of controlling 
it or restricting its spread. The losses resulting from the work of 
the insect have not as yet been extensive, but a gradual increase an- 
nually in such losses has occurred throughout all of the older areas 
of infestation in this country. 
Note.—This bulletin is intended to supply practical information regarding the Euro- 
pean corn borer to corn growers, corn canners, dealers in green vegetables, and market 
and home gardeners. Complete technical details regarding the Federal investigations 
of the corn borer will be supplied in a subsequent publication. 
1 Pyrausta nubilalis Hiibn. ; order Lepidoptera, family Pyralidae, subfamily Pyraustinae. 
i! 
