Abstract
Jalysus spinosus (Say) developed from egg to adult in the laboratory in about 20 days at 25.5° C. This insect predator required animal food for optimal nymphal development, adult maintenance, and oogenesis. The mean number of eggs laid was 136.8 and the mean rate of oviposition was 4.2 eggs/day. A nymph (2nd stage to adult) destroyed an average total of 12 eggs of the tobacco hornworm, Manduca sexta (L.), compared with an average total of 79.3 eggs of the tobacco budworm, Heliothis virescens (F.), destroyed by a nymph (newlyhatched to adult). Adult females ate an average of 10.0 budworm and 1.1 hornworm eggs per day. Comparable figures for males were 5.7 and 0.3.
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