112 PESTS OF GARDEN AND FIELD CROPS 
two fifths of an inch long, slender, whitish or yellowish, and has a 
black or brown head. 
The adult is a small beetle, greenish in color, one fourth of an inch in 
length. It is 
found occasion- 
ally on melons 
orsquashes, along 
with its relative, 
the striped cu- 
cumber beetle, 
but is more apt 
to be seen on sun- 
Fic. 74. — The Western Corn Root- flowers, golden 
worm. Adult. Enlarged and natu- rod, or thistle 
ral size. Original. 
blossoms. 
There is one generation each year. The winter 
is passed as eggs beneath the surface of the ground. 
The simplest means of control is crop rotation. ee ee 
The eggs are laid only in cornfields in late summer, of the: West= 
and the larv are injurious only to corn. If corn — ern Corn Root- 
is planted in fields that have been in other crops, it Me aa veer 
will not be injured. In practice it is usually safe 
to run corn two years in succession, changing to another crop the 
third year. 
Corn-root Webworms (Crambus spp.) 
Young corn plants are seriously injured or killed by several species 
of webworms feeding on the roots, or on the stalk close to the surface of 
the ground. The outward evidence of attack is the stunted growth of 
the corn or the death of young plants. Injury is always worse in ground 
just broken up from sod. 
The same insects attack in similar fashion young tobacco plants in 
certain eastern sections. 
Several species are recorded, all in the genus Crambus, and including 
C. rulriragellus Clem., C. luteolellus Clem., C. trisectus Walk., and C. 
mutabilis Clem. 
