none Suppression of the stored-product pest Cadra cautella by the parasitic wasp Bracon hebetor in conjunction with food packaging was studied. Tests were conducted in store rooms (27C, 40-60% RH) over 16 wk with small packages of raisins (0.26/kg) in paperboard boxes and corn meal (0.91/kg) in 2-ply paper bags. For both types of packaging some of the test packages were perforated (1.0 mm hole). On a weekly basis, 50 pairs of B. hebetor were released into some of the store rooms. Pest levels were assessed in sample packages at 2, 4, 6, 8 and 16 wk. Results from wk 8 and 16 were not examined due to high infestation levels. At 6 wk the introduction of B. hebetor had reduced pest populations in perforated raisin packages by 99.1% compared with levels in stored rooms without the parasitic wasp. In unperforated packages the reduction was lower at 81.7%, indicating that intact packages shielded the pest from the wasp. Effect of packaging alone (without B. hebetor) showed that infestation levels were significantly higher in packages with perforations than in intact packages. At 6 wk intact packages infestation levels were 78% lower than in perforated packages. For corn meal, package perforation had no effect on infestation levels. Presence of B. hebetor did reduce pest infestation. At 6 wk levels in rooms with B. hebetor releases were 87-89.4% less than in rooms without B. hebetor.