Mass-Rearing the Cabbage Looper, Trichoplusia NI, with Notes on Its Biology in the Laboratory1

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Abstract
Large numbers of the cabbage looper can be easily reared on broccoli foliage in the laboratory provided the temperature is maintained at 75°±2° F. and strict sanitation, s employed to prevent bacterial and viral infection. Under these conditions the insects will pass through 13 generations each year. Larval weight approximately doubles each day and each larva consumes about three times its weight in food daily. Head capsule width was determined on each larval instar and the reproductive capacity was studied on each of three moth colonies.