This study aims to determine the effectiveness of Phymar CSL on the attacks intensity of fruit fly and the effect of its application on the production of chili plants. This research was conducted in Konda 1 Village, Konda District, South Konawe Regency, Southeast Sulawesi Province from April to December 2021. This study used a Randomized Block Design (RBD) with 7 treatments, namely D0: Control (without Phymar CSL application), D1: 10 mL Phymar CSL/L of water with 1 application/week, D2: 10 mL of Phymar CSL/L of water with 2 applications/week, D3: 20 mL of Phymar CSL/L of water with 1 application/week, D4: 20 mL Phymar CSL/L of water with 2 applications/week, D5: 30 mL of Phymar CSL/L of water with 1 application/week and D6: 30 mL of Phymar CSL/L of water with 2 applications/week. The treatment was repeated three times so that there were 21 treatment units. The variables observed were fruit fly attack intensity (%) and crop production (kg). The results showed that the application of the pesticide Phymar CSL was effective in controlling the fruit fly Bactrocera spp. on chili plants. Treatment D6 (30 mL/L of water with two applications/week) with an average attack intensity of 17.87% showed a more effective treatment than other treatments. The highest production was obtained in the D6 treatment (30 mL/l of water with two applications/week) which was 3,932 kg.