| 摘要 |
<p>A combustible pesticidal product (10) is disclosed which comprises a planar continuous helix (11) in the form of a hexagon having sides (24, 25, 26, 27, 28 and 29). An intersection (20, 22) of each side of the structure has a radius of curvature of 5.0 mm to less than 58.5 mm, most preferably 9.0 to 10.0 mm. Typically the combustible product will be a mosquito coil formed from cardboard which has been impregnated with one or more insecticides effective against mosquitoes. On combustion of the coil, insecticide may be emanated into the atmosphere for a period of up to 24 hours. However, typically the coils of the invention will be active against mosquitoes for 12 hours.</p> |
