MAGGOTS ATTACKING THE ROOTS 119 
Fig. 86. — Adult of the Cabbage- 
maggot. Enlarged and natural 
size. Original. 
by soft, whitish maggots, one 
fourth of an inch long. When 
working on cabbage, the mag- 
gots eat away the root hairs and 
gnaw into the larger root. Their 
Fic. 87.— Work of the Cabbage-maggot 
work is accompanied often by evaedishes- Ceiuual, 
more or less decay of the tissue. 
When working on radishes, they frequently tunnel entirely within 
and through the fleshy main root, or cause injury of such a 
nature that a much-branched root is developed instead of a 
single, symmetrical tap root. 
A hairy, two-winged fly is the parent of the maggots. Eggs are 
laid on the ground 
near the stem, or on 
the stem itself, and 
the young maggots 
make their way into 
the ground along the 
outside of the stem. 
Fig. 88.— Tool for cutting hexagonal disks. There sa two to four 
Original. generations annually. 
