A Successful Technique for Mass-Rearing Cabbage Loopers on a Semisynthetic Diet

The medium, apparatus, and procedures used in rearing cabbage loopers ( Trichoplusia ni (Hubner)) are described. Studies on the biology of diet-reared loopers include information on number of larval instars and duration, measurements of head-capsule width and body length, rates of prepupation, pupation, and adult emergence, and average longevity of the different stages.