【Aim】 Drepanococcus chiton, a newly discovered pest affecting Phyllanthus emblica in China, poses a significant threat to both agricultural production and ecological security. This study aims to identify effective pesticides for controlling D. chiton and guides practitioners in their rational application. 【Method】 We conducted indoor toxicity tests on eight insecticides using the immersion method. Subsequently, we evaluated the field control efficacy of five insecticides displaying high toxicity using the spray method. 【Result】 In the indoor toxicity tests, chlorpyrifos, acetamiprid, imidacloprid, avermectin, and emamectin benzoate exhibited strong toxicity to first- and second- instar nymphs. Their respective lethal concentrations (LC₅₀) within 48 h were 11.1245 and 26.2376 mg·L^-1, 17.5381 and 26.1910 mg·L^-1, 27.5896 and 34.2868 mg·L^-1, 26.5876 and 38.8034 mg·L^-1, 29.0528 and 43.0443 mg·L^-1. Chlorpyrifos and avermectin displayed higher toxicity to the third-instar nymphs and female adults, with LC₅₀ values of 87.3427 and 495.8339 mg·L^-1, 95.4751 and 1131.6430 mg·L^-1 respectively. In contrast, spirotetramate, pyriproxyfen, and lambda-cyhalothrin exhibited lower toxicity to insects of all developmental stages. Among the insecticides, chlorpyrifos demonstrated high virulence in nymphs of all ages. In the field control test, chlorpyrifos and avermectin proved highly effective in inhibiting the growth of D. chiton populations, with control success rates of 96.90% and 92.00%, respectively, seven days after treatment. Imidacloprid, emamectin benzoate, and acetamiprid effectively killed young nymph populations, achieving success rates of 78.06%, 67.62%, and 62.78%, respectively, seven days after treatment. 【Conclusion】 Effective chemical control of D. chiton should target the 1-2 instar nymph stage using avermectin, chlorpyrifos, imidacloprid, emamectin benzoate and acetamiprid alternately. Chlorpyrifos and avermectin are recommended when the third-instar female nymphs and female adults are observed at a high frequency. Additionally, continuous monitoring of pesticide damage and resistance is essential.