cabbage looper

noun1

1. •
   Trichoplusia ni, a widespread noctuid moth which in its caterpillar stage is an important crop pest.

   • The cabbage looper (Trichoplusia ni (Hbn.)) is an example of a caterpillar that feeds more or less exposed on the plant, in contrast to cutworms and borers, which are usually not seen. — 1948