菜青虫

[ noun ]
white butterfly whose larvae (cabbageworms) feed on cabbage
<noun.animal>

cabbage butterfly \cab"bage butterfly\ (Zo["o]l.),
a white butterfly ({Pieris rap[ae]} of both Europe and
America, and the allied {Pieris oleracea}, a native American
species) which, in the larval state, devours the leaves of
the cabbage and the turnip. See also {Cabbage worm}, below.