The purpose of mosquito fogging operations is to kill, or ‘knock-down’, any adult dengue mosquitoes that may be carrying the dengue, zika and other virus. The mosquitos become infected with the virus after biting and taking blood from someone who is sick with dengue. To try and prevent the infected mosquito from biting another person and passing on the disease, Pest Assassins is applying the mosquito fog in areas where a lot of dengue cases have been reported to try to kill as many adult dengue mosquitoes as possible.
The insecticide used in the mosquito fogging is a synthetic pyrethroid that is very similar to the insecticides used in most domestic insect spray cans that are found on supermarket shelves. The ‘fog’ is created by blasting the mixture of insecticide and water into very fine droplets through the fogging machine. The amount of insecticide in the fog is very small, and is dispersed at quantities that can only kill something as small as a mosquito, so at the concentrations used there will be no adverse health effects on people who are occasionally exposed to the fog. The type of insecticide being used in the fogger is also completely odourless.
The ‘mosquito fogger’ is a very large and noisy machine that is transported in the back of a truck. The vehicle has a warning light and is driven slowly around the streets where high dengue numbers have been recorded, blowing the fog into the yards for a distance of up to 90 metres away. It is useful for residents to leave all doors and windows in their house open at the time of fogging, as this will allow the fog to enter the house and kill any mosquitoes inside. Mosquito fogging operations are usually carried out between 5:30-7:30am, or 4:30-6:30pm, as this is the time when the outdoor dengue vector is most active and is looking to bite.
While the fogging operations will have some success in killing adult mosquitoes in the areas that are treated, residents are warned that this activity alone is not enough to protect everyone or prevent all dengue infections. To reduce and control dengue outbreaks a number of actions need to be taken not only by public authorities but also by residents. These include making sure there are no dengue mosquitoes breeding in your yard, such as in tires, drums, buckets and any water storage containers, and that you also protect your family from mosquito bites inside and outside the house during the day and in the early morning and early evening. The best methods of personal protection are to apply insect repellent and/or to wear long sleeves and long pants. Call the Pest Assassins for fogging.