This is an automatically translated article.
Spraying insecticides is an effective measure to eliminate mosquitoes and protect human health against mosquito-borne diseases such as dengue fever, Japanese encephalitis... Spraying insecticides properly and correctly time will bring high results and safe for public health.
1. When should mosquito spray?
Insecticidal products include three groups: Organochlorine-based drugs; The pyrethrine group and the phosphorus group. In particular, the mosquito killer of the Pyrethrine group is used by the Ministry of Health to prevent dengue fever in the community. Mosquito repellent has been tested in 3 regions and shows that it is safe for human health. The drug is sprayed into the space in a small volume as a mist. After a few hours, the amount of chemicals will diffuse in the air so it is completely safe for health.
However, in order to spray the mosquito killer with maximum effectiveness, it is necessary to pay attention to the time of mosquito spraying, if sprayed at the right time, the number of infected mosquitoes will be killed more, vice versa, if spraying is wrong. In time, mosquitoes will be less affected and may be resistant to the drug. So when should mosquito spray?
Hours of operation for each type of mosquito are different. The dengue-causing Aedes mosquito is active during the day, most active in the early morning. Therefore, the most effective time to spray dengue mosquito killer is in the morning and before sunset. In contrast, the mosquito species culex tritaeniorhynchus transmits Japanese encephalitis. Its main activity time is at night, and during the day it flies out to rice fields to reproduce. Therefore, the most effective time to spray mosquitoes is from 19 to 22 at night.
According to health experts, indoor mosquitoes should be sprayed in the early morning until 10 am or at dusk in conditions of no rain and little wind. This is the time when they are most active for optimal spraying results.
Thời gian phun thuốc hiệu quả nhất cho từng loài muỗi là khác nhau
2. Does spraying insecticides affect human health?
There are two main ways to spray insecticides, which are household use of mosquito spray at home and spraying against dengue fever in the community as indicated by the Health sector.
When spraying mosquitoes with a spray bottle at home, it is necessary to choose aerosols licensed and registered by the Ministry of Health. If used according to the manufacturer's instructions, the chemicals in the mosquito spray will not affect human health. However, the limitation of using aerosol cans is that the duration of the effect of the drug is short, the space is narrow, and it is limited in the household, so it is not possible to kill all the mosquitoes that transmit the disease.
Spraying in the community as specified by the Health sector using a ULV sprayer, the sprayer needs to have skills in using the machine, type of machine, spray speed, and spray concentration as recommended by the Ministry of Health. The amount of chemicals in the mosquito killer is very small, it is sprayed in a large space in the form of a hot mist, so it is not toxic and does not affect human health.
The method of spraying mosquito repellent against dengue fever has an immediate effect, but it is not long-lasting and has a certain impact on the environment. Therefore, only spray on peak periods to quickly kill disease-causing mosquitoes. Keeping the environment and living space clean, killing swarms and sticks is still the most long-term prevention of dengue fever.
3. Notes when spraying mosquito repellent
Chỉ nên vào nhà sau khi phun thuốc diệt muỗi ít nhất 60 phút
Before spraying insecticide, it is necessary to move people, pets, clothes and furniture out of the house, cover living items and food processing tools, and close windows. Only enter the house after spraying the insecticide for at least 60 minutes to ensure that the medicine has diffused in the space. Although mosquito repellent is relatively safe, however, some people with sensitive areas may experience symptoms such as: red eyes, cough, nausea, sneezing, itching... When this is the case, You can wash it with clean water many times, if it doesn't help you need to go to a medical facility. In addition to affecting mosquitoes, insecticides can affect other insects and pets such as ants, cockroaches, bees, birds, silkworms... Measures to prevent dengue fever by spraying insecticides only work Short use, in small space. Therefore, to prevent dengue fever, you need to apply other non-chemical mosquito control methods.
4. How to prevent mosquitoes during the dengue fever season effectively
Currently there is no vaccine and specific treatment for dengue fever, preventing and killing mosquitoes is the most effective way to prevent dengue. To prevent mosquitoes during the epidemic season effectively, you can apply the following measures:
Mosquitoes often live around the house, laying eggs in water containers such as pots, tanks, flowerpots, water tanks.... Therefore, it is necessary to cover water containers so that mosquitoes cannot enter and lay eggs. Kill squirrels, larvae by dropping fish into the water tank, turning over non-water-containing tools, changing the water in the vase regularly... Clean up garbage, keep the environment and living space clean. Drop nets and wear long-sleeved clothes to prevent mosquito bites. Besides spraying mosquito spray, other mosquito control measures can be applied such as: using electric mosquito nets, fans to catch mosquitoes, applying anti-mosquito drugs, burning incense to repel mosquitoes.... Each family should actively coordinate with the industry. Health care to kill mosquitoes, prevent dengue fever spreading in the community. In case of high fever and muscle pain suspected of being infected with dengue fever, it is necessary to quickly go to a medical facility for examination and treatment, do not arbitrarily treat the disease at home.
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