— 45 — 
over winter upon cabbages or their stumps that are left in 
the field in the fall, d'hese should all be plowed deeply 
under or otherwise destroyed in the fall. An additional pre- 
caution of considerable value is to rotate the crop so as not 
to grow a crop nearer than necessary to ground where the 
lice were present the preceding year. 
THE IMPORTED CABBAGE BUTTERFLY. {Pierls rapae 
Linn.) 
This insect in the mature state is a white butterfly with 
black tips to the anterior wings and the male usually has 
four and the female six small black spots on the wings above 
as shown in the accompanying illustration. 
The butterflies appear early in the spring and are ready 
to begin laying eggs on leaves of cabbages, cauliflowers,, 
turnips and some other Cruciferous plants as soon as the 
plants are set out. The eggs are light yellow in color and 
are deposited singly. The worms, soon after hatching, 
assume a dark green color, almost identical with that of the 
leaves which serve as their food. Not infrequently the 
worms eat into the head of cabbages and ruin them for the 
market. 
B A 
Pig. 43. — Imported Cabbage ButteiHy; A, male; B, female. As seen 
from above, natural size. (After Riley.) 
Remedies^ — Mix one pound of Paris green with twenty 
pounds of wheat flour and lightly dust the leaves while the 
dew is on. Apply freely up to the time the heads begin to 
form and after that use rather sparingly on cabbage heads 
and not at all on cauliflowers. Do not use nearer than ten 
days to the time when the cabbages are to be harvested. If 
used freely when the cabbages are small, there will be little 
need of much being applied when the heads are nearly 
grown. If used as above directed there will be no danger 
from eating the cabbages. Cabbage leaves are all the time 
opening out so that the leaves that are a part of the head 
