The study investigated the efficacy of chili and black pepper oleoresins through dry film and contact toxicity bioassays against psyllids, mites, aphids, and mealy bugs under laboratory conditions. The oleoresins were found to possess high mortality rates at all concentrations tested. Among the insects tested, aphids were the most susceptible, with 80.33% mortality, even in the dry film bioassay's lowest concentration (0.1%). The decreasing order of efficacy was aphids > mites > psyllids > mealybugs. Against mealybugs, both the oleoresins were effective at 3 and 5% concentrations under contact toxicity bioassay only. Dry film bioassay was also found to be effective, indicating the presence of residual toxicity.