Extreme pesticide use in tomato growing could have negative impact on the environment and human health. In this study, the rate of dissipation of three commonly used pesticides for growing tomatoes, acetamiprid, metalaxyl-M, and fenpyroximate was assessed. Within two weeks after the application of pesticides, tomato samples were collected from field and greenhouses and the pesticide residues were extracted using QuEChERS technology and quantified using high-performance liquid chromatography and diode array detection (HPLC-DAD). Recovery assays were performed in the levels of 0.1, 0.5 and 1.0 mg/kg. The recovery rates for acetamiprid, metalaxyl-M, and fenpyroximate were 87.71 ± 1.33 %, 92.08 ± 2.35 % and 91.77 ± 1.06 %, respectively. The Preharvest intervals (PHI) for these pesticides in greenhouse and field tomato plants ranged from 5 to 7 days. The half-lives of these pesticides were determined to be 1.80, 0.80 and 1.75 days, respectively, for acetamiprid, metalaxyl-M, and fenpyroximate in tomato samples taken from open fields, and to be 1.48, 2.27 and 1.36 days, respectively, in tomato samples taken from greenhouses. The amount of detected pesticide residues remained in the treated tomato fruits are affected by cooking. Pesticide residues were essentially undetectable in tomato paste.