How to distinguish between toxic and nontoxic mosquito-repellent incense

Mosquito-repellent incense divide into two kinds, safety and toxic safety of mosquito coil incense to pyrethrum pesticide plants as the main raw material, such as mosquitoes to paralysis, make its killed, and yuan to harm to the human body;Poisonous mosquito coil incense is made use of the 666, raise pesticide DDT, can drive midge, cannot kill mosquitoes, harmful to human body.So, how to identify whether the mosquito-repellent incense toxic?1, non-toxic mosquito-repellent incense processing fine, bright color, strong adhesion, a mosquito coil can be lit around 6 hours, not easy to go out;Poisonous mosquito repellent processing rough house, have a large interested grain impurities, weak adhesion, easy to broken, a mosquito coil can only be lit around 4 hours, easy to go out.2, security mosquito-repellent incense ignited flame for creature, smoke is white or blue;Poisonous mosquito repellent lighting the fire for the green, smoke.3, light after security lit mosquito-repellent incense smoke, smell fragrant;Poisonous mosquito repellent lit after the pungent odor, smelling the dizzy.After choosing mosquito-repellent incense must pay attention to.

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