103 
The Cabbage Cut- Worm (Agrotis annexa, Fr.) 
The larva of this moth (kindly determined for me by Prof C V 
ley) was found destroying young cabbage plants at'Normal’ in 
e middle of April. It came out of the ground when the sun was 
11 m, cut off the plants at or near the surface, and then ate 
e leaves. In a garden containing 600 plants not over twenty 
thirty were left. The owner killed about 200 worms on the 
st day of their appearance, and 500 or 600 on the day follow- 
?• The held was afterwards set to late cabbages, which were not 
Dlested. The application of Paris green would have probably ex- 
rminated the worms, if made in time. 
u!' ' 
The Stalk-Borer (Gortyna nitela, Guenee). 
r 
Fig. 23.—Stalk borer (Gortyna nilela, Guenee). 1 Moth, 2 larva. 
This worm was found injurious to oats throughout Central and 
j-rthern Illinois, in July and August. The effect upon the grain 
'S to blast the head, preventing the kernel from filling. 
The entrance of the worm to the stalk was made anywhere from 
3ve the first joint to the fourth joint below. The worms found in 
e oats were not more than half grown, and the size of the open- 
?s by which they entered the stalk made it evident that they were 
hatched upon this grain. In some cases they emerged by the 
■fice of entrance, and in others made a separate exit. The differ- 
?e in size between the openings of entrance and exit was usually 
Hal, showing that the worms grew but slightly in a single stalk, 
t one larva to a straw was found, except in a single instance, 
ere two had. met face to face. One of these had attacked the 
Uer, and eaten away part of its head, although both were still 
Lng. The damage done, as far as noticed, was within a few rods 
ffthe margins of the fields, showing that the worms had penetrated 
m without. They had doubtless bred in the grass and other 
pds adjacent, and such injury as resulted might probably have 
■n prevented by keeping down the weeds outside the field. 
The Zebra Caterpillar (Mamestra picta, Haw.) 
l single larva of this species was found at Normal in September, 
ling upon kernels of corn in the ear. 
