This work aimed to evaluate the insecticidal activity of the leaf essential oil of C. camphora and its major compound, linalool, on A. gemmatalis by ingestion. The individuals were evaluated in 24, 48, 72, and 96 h of exposure to the following concentrations of essential oil and linalool: 0.1, 0.5, 1.0, 1.5, and 2.0% v/v. The biometric parameters of the surviving pupae were also evaluated. The results indicated that C. camphora leaf essential oil was effective in controlling A. gemmatalis, with 96% mortality after 24 h of exposure (2.0% v/v). Linalool was more effective, causing higher mortality percentages in the same exposure time. Higher exposure times increased the mortality percentages at smaller concentrations. There was no evidence of residual or lasting toxic effects of both the essential oil and linalool on the surviving pupae since the biometric parameters of the pupae have not differed from the negative controls.