Pour a small amount of water into the finished mineral water bottle, add a small amount of white sugar into the bottle (that is, the kind of cooking at home), shake well, and let the sugar liquid stick to the bottle wall evenly. Without a lid, just put the bottle in the corner of the room or other mosquito-infested places. The next morning, you will find those greedy mosquitoes sticking to the bottle wall.
Principle: Mosquitoes prefer sweet things, but the sugar solution itself is sticky and the bottle mouth is relatively small, which is equivalent to setting a sweet trap for mosquitoes.
Super mosquito control program
How to make good use of the anti-mosquito weapon to prevent mosquitoes safely and effectively without harming health? Mosquito experts teach you to be smart against mosquitoes! Jian Kang 3 1 phase
Text/Lin Zhencen/Zheng Jialing
In summer, the season of mosquito activity begins. Do you know how to use all kinds of mosquito repellent products to effectively prevent mosquitoes without damaging your health, from DDT pesticides and pyrethrum essence to DEET mosquito repellent liquid and mosquito trap lamp? What natural plants can prevent mosquitoes?
Electric mosquito-repellent incense
The principle of electric mosquito-repellent incense is that the insecticide (pyrethrum essence) is inhaled into paper and evaporated by hot air, and the general efficacy can last for 6 ~ 8 hours.
The disadvantage is that the efficacy is good at first, and it may be "excessive", but after 4-5 hours, the pesticide volatilizes completely, the efficacy becomes worse, and the mosquito killing effect becomes weaker, said Wang, deputy director of the Environmental Testing Institute of the Department of Health who worked in the Environmental Protection Bureau 12.
Using the principle of capillary tube, the liquid electric mosquito-repellent incense that releases pesticide substances can be heated continuously, which can just make up for the shortage of electric mosquito-repellent incense. The liquid electric mosquito-repellent incense can be used continuously for a long time, about 60 days, and even released regularly.
However, at present, the effective mosquito control days claimed by various manufacturers are lack of evidence, and the Environmental Protection Agency has now asked all manufacturers to submit relevant certification reports.
In addition, according to the report of TEDA Institute of Public Health, there are many unknown harmful compounds besides anthocyanins and toluene in electric mosquito coils. If used in a closed room, it may cause serious allergic phenomena, such as sore throat, stuffy nose and headache. Therefore, it is recommended to keep air circulation when using electric mosquito coils.
Half an hour before going to bed is a good time to use electric mosquito coils. When in use, the doors and windows should be closed, and people and pets should leave. Lin Dingxiang, the leader of vector control group who participated in dengue fever prevention and control for many times, put forward this method.
Mosquito repellent (also called mosquito repellent)
DEET is a component of mosquito repellent, and it is recognized as one of the most effective mosquito repellent products in recent 40 years.
Anti-mosquito liquid can directly act on the tactile organs and chemoreceptors of mosquitoes to drive them away.
Usually, mosquitoes can smell the carbon dioxide produced when people breathe at a distance of 100 meters. When mosquito repellent is applied to the skin, the drug will evaporate with the body temperature, forming protective mold, which makes mosquitoes afraid to approach.
The results showed that 99.9% of mosquito bites could be blocked within 8 hours by applying anti-mosquito liquid. Moreover, it has low toxicity and can repel mosquitoes without high concentration. Generally speaking, 10% DEET has achieved considerable results. Experts suggest that it is best to use it when going out.
Generally speaking, mosquito repellent does not have much side effects, most of which are caused by improper use.
Studies have found that high concentrations of DEET can cause skin discomfort, such as rash, and even neurotoxicity, coma, continuous smoking or accidental death.
Therefore, children should be especially careful when using mosquito repellent. The American Academy of Pediatrics recommends that children should use mosquito repellent less than 10% DEET. It is best not to give it to the baby (it is easy to lick poisoning), and mosquito nets and pants protection are the best way.
When using anti-mosquito liquid, avoid spraying it directly on the wound or rash skin; Don't spray it directly on your face, it is easy to irritate. You can spray it on your hands first and then rub it on your face. Don't let the children daub themselves. Parents had better spray it on their hands before wiping it on their children.
In addition, the disadvantage of DEET is that it is easy to hurt plastics, artificial fibers, feathers or lacquer paintings. And it is best to avoid touching glasses frames, walls, watches or similar furniture.
If you are allergic to DEET, you can also use natural DEET anti-mosquito liquid extracted from plants. "But the effect lasts for a short time, about less than 2 hours," Dr. Mark Frieding, the authoritative clinical guide of mosquito repellent in the United States, reminded.
In addition, the concentration of DEET in mosquito control solution has nothing to do with mosquito control effect. The higher the concentration, the longer it stays on the skin, and the more likely it is to cause allergic reactions.
For adults, it is suggested to choose mosquito repellent with the concentration of 10 ~ 30% DEET. It is enough to stay in mosquito infested places for a long time with 40 ~ 50% DEET anti-mosquito liquid.
As for the latest patents, such as KBR, which is harmless to clothes and wool recently passed by the US Environmental Protection Agency, the efficacy remains for a long time, but whether it is safe for long-term use remains to be seen.
* Mosquito coils
Mosquito-repellent incense has a long history and is the earliest pesticide used. As early as the Southern Song Dynasty thousands of years ago, similar mosquito-repellent incense made of traditional Chinese medicine appeared.
Mosquito-repellent incense slowly releases pesticides into the air by burning at high temperature. "Mosquito repellent effect is greater than mosquito killer effect," Wang pointed out.
However, recent studies have found that mosquito-repellent incense synthesized from sawdust and rice bran will produce polycyclic aromatic hydroxyl substances after being ignited and oxidized, which may cause cancer, just like incense used for barbecue and sacrifice.
Therefore, experts suggest that mosquito-repellent incense should be used outdoors, such as around the home, at the door or in a well-ventilated area. Lighting mosquito-repellent incense at night and before dark has the best mosquito repellent effect.
Mosquito catching lamp
The mosquito trap lamp uses the phototaxis and sensitivity of mosquitoes to special wavelengths to trap mosquitoes to contact the net surface, and burns mosquitoes instantly with high-voltage electric shock net. The principle of electric mosquito swatter is similar.
Mosquito-catching lamps have a good effect on mosquitoes that move at night, such as tropical house mosquitoes. "But not all mosquito traps have the same effect," said section chief Huang Jisen. Taking the wavelength of light as the key, the trapping effect of mosquito trap lamp is the best when the wavelength is concentrated at 370 mm He suggested choosing a mosquito trap lamp with strong luminosity, such as more than 8 watts or double tubes.
In addition, the position of mosquito catching lamp is very important to the effect of mosquito catching.
It is best to put the mosquito trap lamp above the knee and not more than 180 cm from the ground. "This is the area where mosquitoes often move," Lin Dingxiang mentioned, and it is best to change places frequently. The best places are hidden corners and under the table.
When using the mosquito trap lamp, other indoor light sources should be turned off, because mosquitoes are disturbed and can't feel the light source of the mosquito trap lamp, which greatly reduces the mosquito trap effect; It is also used during the day, and the effect will be even worse.
Clean mosquito killer with a brush every week, because mosquitoes can't go near mosquito killer when they see the bodies of other partners.
"You can also add some water and vinegar to the insect collecting box of the mosquito catching lamp, and the mosquito catching effect is better." Huang Jisen uses the characteristics that mosquitoes like acidity to strengthen the mosquito catching effect.
Insecticide
This is the last "last resort", said Huang Jisen, who has thoroughly studied pesticides.
The safe use of pesticides is timely, appropriate and appropriate.
At the right time, we should take advantage of mosquitoes to rest. "Mosquitoes have wings, so you can't catch them," he said to Wang with a smile. It is inefficient to see mosquitoes spraying drugs again, so spraying drugs according to mosquitoes' habits is the best policy.
Mosquitoes sleep at night and only need to spray a few times during the day, and the effect is immediate.
A suitable place refers to a place where mosquitoes like to hide.
Mosquitoes mostly like to hide in dark and humid places. During the day, they can spray pesticides in stairwells, sinks, sewers, bathrooms, cabinets, table feet and other places. In addition, mosquitoes will hide in curtains, cloth curtains and hanging clothes. When spraying pesticides, you can shake these places first to let mosquitoes out.
Use a box or bucket, put some rags in it and set it as a dark and humid "artificial trap". Mosquitoes fly in to have a rest during the day and spray pesticides into it a few times. "Mosquitoes can be easily killed." This is Wang's unique skill.
When and where to kill mosquitoes, you don't need too many pesticides, and you can achieve results.
In addition, some synthetic pyrethroids are toxic to fish, so it is best not to spray them near the aquarium.
"There is no way to completely prevent mosquitoes," said Huang Jisen. Mosquitoes will also develop drug resistance, so it is necessary to use different mosquito repellent methods and products in turn.
A clever way for experts to kill insects without spending money.
Of course, experts also have free mosquito killing methods.
For example, choose bright and light-colored furniture, or reduce indoor humidity, especially in rainy season. The indoor humidity should be controlled at about 50%. "Because mosquitoes like darkness, high temperature and humidity," said Wang, who knows mosquito habits very well.
Using the phototaxis of mosquitoes, turn off the indoor lights at night and open the doors and windows when the outdoor lights are obvious, so that mosquitoes can fly outdoors. Only a little mosquito-repellent incense or insecticide can be used indoors to catch the remaining mosquitoes. This is the suggestion of the Environmental Protection Agency.
As for disturbing people at night, tropical house mosquitoes, which often buzz in their ears, usually grow in ditches and fly home in droves one hour before and after sunset at night. Wang suggested that the screen door should be closed at this time to reduce mosquito harassment.
In addition, Taiwan Province Province, which is unique to rural areas, is commonly known as Black Mosquito and Xiaojingang, but experts are still at a loss. Although the black mosquito does not infect diseases, it bites people and is difficult to disappear. At present, traces of black mosquitoes can also be seen in cities.
Mosquito repellent containing DEET may have a certain repellent effect on black mosquitoes, but the best way is to try not to get close to places where black mosquitoes gather, such as moss and cyanobacteria, from 10 to 2 pm.
Anti-mosquito story, everyone.
However, no matter how effective mosquito killer and pesticides are, they are only temporary measures to prevent mosquitoes. "Improving the environment is the fundamental solution," said Ri Tianqing, director of the Taiwan Province Provincial Mosquito Prevention Bureau.
Mosquitoes need water to grow. As long as the water is cleaned up, "mosquitoes can be reduced by more than half," Huang Jisen vowed.
"Mosquitoes are bred by people." 1989, dengue fever was prevalent in the south. Wang, an anti-mosquito expert who led college students to clean from house to house, once encountered the dilemma that people left the water in the basin unattended and discouraged it.
It is found that the most mosquitoes in Taiwan Province Province are Aedes albopictus hiding under artificial containers, pots and refrigerators and Aedes tropicalis hiding in ditches.
Maybe you can try this method-keep some mosquito-eating fish in ditches, pools and buckets.
Studies have found that eating mosquitoes is best for fighting fish, guppies, pot-bellied fish and soil lice. "Generally, fire water tanks in residential areas, water tanks for watering flowers and water tanks for storing rainwater in fields are all suitable," Section Chief Huang Jisen suggested, pointing to the petite and lively peacock fish in the round water tank on the table.