Abstract
A 4-yr study showed cabbage loopers, Trichoplusia ni (Hübner), and soybean loopers, Pseudoplusia includens (Walker), most abundant in April, July and August. Cabbage loopers were collected from 28 host plant species and soybean loopers from 22 hosts. Total parasitism of loopers was considerable (58–71%) during all but 4 mo of the year. Twentynine parasite species were reared from looper larvae and pupae.