Mosquitoes are not attracted by light like moths, but they are influenced by it. With bright light in urban areas or big cities, the disease transmission season could be extended. Moreover, they locate targets using carbon dioxide, odour and body heat. However, bright outdoor lights create a visible landing spot and blood-sucking.
Outdoor lights contribute to making mosquito season feel longer, though the effect is indirect. Moreover, cool white, daylight, blue, violet, and ultraviolet-rich lights attract more insects.
The death of people
Creating a complete historical table of all mosquito-related deaths is challenging because comprehensive global data for diseases, such as dengue, yellow fever, and chikungunya,, have only been reliably collected in recent decades. However, the table below provides an overview for the most recent period, where data is available, combining figures for malaria and other major mosquito-borne diseases.
Source: consultorsalud.com and WHO
N.B: All mosquito-borne diseases combined are estimated to cause more than 700,000 deaths annually (WHO)
Why it happens
Many mosquito species are not attracted to standard warm-white or yellow light, but artificial lighting, especially LED and fluorescent lights, can disrupt their behaviour. Light pollution extends their daily activity period, tricking them into remaining active and seeking blood meals later into the evening and even into longer bloodsucking season, since artificial heat from lights also creates warmer microclimates. Some species use light cues to locate resting or breeding sites, prolonging their reproductive window.
Effect on urban life
Longer mosquito seasons mean increased nuisance biting, higher risk of vector-borne diseases (e.g., West Nile virus, malaria, dengue and Zika), reduced outdoor recreational time, and added costs for pest control and public health measures.
What needs to be done for urban mosquito control
There are many ways to control mosquitoes. A few examples are provided below:
Use yellow or amber LED lights
Switching to yellow, amber, or warm-toned LED lights (around 2700K–3000K) is a highly effective way to reduce mosquitoes population.
Reducing lighting and its pattern
Reduce unnecessary outdoor lighting and use Passive Infrared motion sensors.
Drain standing water
Eliminate standing water in drains, planters, and gutters. Standing water in yard drains or catch basins usually indicates a blockage or a dip in your drainage line. So, clear debris, check the drainage slope and flush the liner. Water pooling in pots and planters is a sign of poor drainage or blocked exit holes, which need to be fixed.
Insecticide and biological agent
Only the use of larvicide will not effectively control mosquito unless applied at the proper growth stages (larvae and pupae). Before applying larvicides, eliminate stagnant water, adopt water management techniques for larger areas, and keep your yard clean. Bacillus thuringiensis var. israelensis (Bti), Bacillus sphaericus (Bs), and insect growth regulators can be utilised. Biological control agents, such as Gambusia affinis (Mosquitofish), Copepods, and Beauveria bassiana (biopesticide fungi), also play an important role in mosquito control.
Surveillance and evaluation
Continuous monitoring and community engagement are essential for mosquito control. Collect water samples regularly and check for the presence of larvae or pupae. It will help in adopting control measures. Without community engagement, mosquito breeding grounds cannot be eliminated.
Prospects of mosquito control
There is significant hope for effective mosquito control in the future, driven by several innovative research frontiers that move beyond traditional insecticides.
Promising Technologies
Gene drive is a groundbreaking approach to modify genes for spreading rapidly through mosquito populations. In lab trials, researchers successfully eliminated malaria-carrying mosquitoes in less than 11 generations using this technology. Field trials in wild settings are expected within a few years.
Genetically modified mosquitoes have also been developed in Africa that block malaria parasite transmission, representing the first such strain created by African scientists for local communities.
Biological Control Innovations
Engineered fungi now produce a sweet-smelling compound called longifolene that attracts mosquitoes like flowers, then infects and kills them. In tests, this approach achieved 90-100% mortality, even when competing with human scents and real flowers. The fungus is harmless to humans, affordable to produce using agricultural waste, and maintains effective control for months.
Wolbachia-Based Strategies
Wolbachia bacteria represent one of the most field-ready innovations. When introduced into Aedes aegypti mosquitoes, this bacterium reduces their ability to transmit dengue and other viruses. Large-scale deployments in Colombia, Indonesia, and Malaysia have already shown significant reductions in dengue cases.
Climate-Smart Genetic Tools
Temperature-controlled gene editing using CRISPR-Cas12a allows scientists to create sterile males that only become sterile at higher temperatures. This simplifies production and eliminates the need for complex sex-sorting of insects.
Future Research Priorities
- Environmental stability: Ensuring these biological tools work across different temperatures and humidity levels
- Ethical frameworks: Addressing public acceptance and regulatory considerations
- Integrated approaches: Combining multiple strategies (gene drive, Wolbachia, fungi) for diverse settings
- Scalability: Developing affordable solutions for low-resource countries
Conclusion
Outdoor lighting subtly yet significantly prolongs mosquito season by extending their active hours and creating favourable microclimates. This intensifies urban nuisances and disease risks, limiting evening outdoor life. Effective urban mosquito control demands smarter lighting, using amber LEDs and motion sensors, paired with traditional measures like eliminating standing water and applying larvicides.
By integrating light management into public health strategies, cities can reclaim their nights, reduce vector hazards, and foster more resilient, bite-free urban environments. Small changes in illumination can yield powerful, lasting results.