The fumigation toxicity of carbonyl sulfide to T. castaneum as a storage grain pest was evaluated. Carbonyl sulfide (COS) is registered in Australia for microorganism present in soil, root and fertilizer. the fumigation activity of carbonyl sulfide was investigated in 12 L desiccator for 24 h exposure to eggs, larvae, pupae, adults of T. castaneum. Eggs and pupae were showed 87.3% and 95.6% mortality for 25 mg/L of COS, respectively. Larvae and adults were investigated with 80.0% and 100.0% mortality at 15 mg/L treatment, respectively. Therefore, the eggs of T. castaneum showed the highest tolerance to COS.

• Geun Ho Jeong(Department of Plant Medicine, Chungbuk National University)
• Sung Woo Cho(Department of Plant Medicine, Chungbuk National University)
• Hyun-Na Koo(Department of Plant Medicine, Chungbuk National University)
• Hyun Kyung Kim(Department of Plant Medicine, Chungbuk National University)
• Bongsu Kim(Department of Plant Medicine, Chungbuk National University/Animal and Plant Quarantine and Inspection Agency (APQA))
• Jeongoh Yang(Animal and Plant Quarantine and Inspection Agency (APQA))
• Gil-Hah Kim(Department of Plant Medicine, Chungbuk National University)