In 1885, Wakayama county of the city known as the “king of orange” up the hill (Wakayama is well-known for oranges), there is a mountain the Keio University graduated Ichiro (24) at the time, set up the mountain shop, want to let the home production of oranges exported to foreign countries.
The carrier of incense is sawdust, and the carrier of electric mosquito coil repellent is carbon hydrogen compound. But the dish is polluted big, produce smoke, suitable for use in outdoor, balcony and so on. And the film type electric mosquito coil incense and liquid electric mosquito-repellent incense is small, suitable for indoor use. Only a few of component mosquito-repellent incense, arrange toxicity (from big to small) : organophosphate class (trichlorfon/chlorpyrifos/pest enemy) — carbamate (propoxur/mix out Wei) – strain (cypermethrin/propionic chrysanthemum ester/propylene chrysanthemum ester/ES, chrysanthemum ester).
How to choose mosquito coil?
1. Buy mosquito coil with guaranteed quality.
If you look at the box, it's better to use the anti-mosquito products such as “electric mosquito beat” and other safe and non-toxic side effects to avoid mosquito coil poisoning. If the selection of mosquito – repellent incense, insecticide, repellent, etc., the low – toxic products should be selected as appropriate, and the harm is minimized. And the box should have the factory name, the site, the production date, the expiration date, the composition, the execution standard, the pesticide registration certificate and so on, these are the guarantees.
2. Judging from the appearance.
Take the coil of mosquito coil incense as an example, the surface roughness shows the quality is not good. For electric mosquito-repellent incense and liquid mosquito coil incense, its plastic parts should not have obvious buckling deformation, cracks, scratches, burrs, etc., the fasteners shall not be loosened. Look at the production date. The closer the production date, the better the mosquito repellent effect.
3. Judging from the use time length.
In appearance, the qualified mosquito-repellent incense processing is fine, the color is even, the anti-folding force is strong, the time is about 7 ~ 8 hours; Inferior mosquito-repellent incense is rough and loose, easy to break and put out. The qualified mosquito-repellent incense is lit only with a yellow flame and white smoke, while the poisonous mosquito coil is green flame and black smoke. Qualified mosquito – repellent incense is ignited, the smoke is diluted, the smell is not strong, and there is a natural fragrance; In the process of opening and lighting the poisonous mosquito coil, there will be a feeling of pungent, giddy feeling, and will also have the heart palpitation chest tightness and other adverse reactions. The smell of mosquito coil is very strong, and it is harmful to human body.
We need to think carefully when we buy mosquito-repellent incense. Qualified mosquito – repellent incense ash should be white or gray, while toxic mosquito – repellent incense ash is black. If it is impossible to identify whether the mosquito coil is safe and qualified, it should be stopped immediately after lighting the mosquito coil with a strong smell.