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Abstract Liquid smoke is an acetic acid (vinegar) obtained by dry distillation of the raw materials of smoke originating from coconut shell, coconut fiber or maximal heated wood. This study aims to determine the effect of liquid smoke to the growth of Thrips tabaci pests on chili plants, as well as ecological values, social, and economic and easy to develop in the community.This research begins with the manufacture of liquid smoke treatment equipment, then coconut shell is dried until it-s the concentration is reduced and burned for 3-4 hours at a temperature of 140O-250O to produce liquid smoke. The parameters observed were pH, phenol content, acid content, a dose of liquid smoke. On chilli plants, and the effectiveness of liquid smoke on chili plants. These results of this study indicate that the temperature range of 140O - 250O antibacterial activities against Thrips tabaci with a pH value is 3.5, the phenol value is 41.88 mg / I (ppm), and the acid content obtained is 9.74%. Chili plants that are exposed to Thrips tabaci pests with a dose of 20 ml liquid smoke inhibits the growth of Thrips tabaci pests in chili plants until the death of pests and plant experienced growth of new shoots.