Florida Agricultural Experiment Station


all winter in the latitude of Gainesville and south. The cocoon
placed on the leaf is a loosely-woven affair thru which the pupa
(fig. 66, e) may be seen plainly.
 The adult (fig. 66, f) is a small moth 5/8 of an inch across
the expanded wings, which are gray with a border of lighter
areas. When the wings are folded in the resting position (fig.
66, h) these areas form diamond-shaped patches along the back.
For this reason the moth is also called the "diamond-back" moth.
 CABBAGE BUTTERFLIES
 The caterpillars of these white butterflies are injurious to
late cabbage and collards. They do not seriously trouble the
main winter-grown crop of cabbage because they
are not active at that season.
 IMPORTED CABBAGE-WORM (Pontia rapae).-
In the northern and western parts of the State
the most common cabbage butterfly is the im-
ported cabbage-worm, a pest which was brought
to this country about 1856. It has since spread
over the entire country, reaching Florida about
1890, but has never become as abundant as in
the Northern States.
 The full-grown caterpillar (fig. 67, a) is
about 114 inches long, bright green with a FGor 6e7--mb-
yellowish line down the middle of its back and bage butter-
 fly: a, Larva;
 a row of spots of the same color along its b, pupa. Nat-
 ural size.
 sides. Two or three weeks are required for (From U. .n
 its growth. It then crawls to some sheltered
 place and there transforms into the pupa (fig. 67, b) and 8 or
 10 days later, in warm weather, the butterfly (figs. 68, 69)
 emerges. But those which enter the pupa stage in the late fall








 FIG. 68.-Imported cabbage but FIG. 69.-Imported cabbage butter-
 terfly: Female. Natural size. fly: Male. Natural size. (From
 (From U. S. Bur. of Ent.) U. S. Bur. of Ent.)
 remain there all winter, at least in the northern part of the
 State. The eggs are white or yellow in color and are scattered
 over the surface of the leaf.