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The biological half-life and final residue levels of indoxacarb and pyridalyl were determined in cauliflower over a 10-day cultivation period following applications of a standard (100 g a.i.ha–1 and 200 g a.i.·ha–1, respectively) and double dose (200 g a.i.·ha–1 and 400 g a.i.·ha–1, respectively). The residue levels were analyzed by gas chromatography with recovery ranging from 92.1% to 109.7%. The biological half-lives of indoxacarb and pyridalyl were 6.33 and 7.74 days for the standard dose, and 6.26 and 7.44 days for the double dose, respectively. The initial and persisting concentrations of indoxacarb and pyridalyl were all below the Korean maximum residue limits for broccoli of 1.0 mgkg–1 and 3.0 mgkg–1, respectively.