A fumigating composition comprises an intimate mixture of D.D.T., white gum (Almus japonica), cheung sik (Achillea sibirica) and fa fan (Cryptomeria japonica). The preferred composition contains 10 per cent D.D.T., 10 per cent cheung sik, 25 per cent fa fan and 55 per cent white gum. It is prepared in the form of a coil by adding to the powdered ingredients sufficient water to form a mouldable mass, pressing said mass into a suitable mould and thereafter drying said coil. When ignited the coil produces a fumigating smoke.
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