Exterminators PLC calls for urgent shift from fogging to sustainable mosquito control as dengue risk rises

As mosquito season approaches, Marlon Ferreira, Founder and Managing Director of Exterminators PLC and Sentario UK Limited, is calling for a fundamental shift in how Sri Lanka addresses mosquito-borne diseases such as dengue. While thermal fogging has long been a visible symbol of mosquito control, he warns that the practice is largely ineffective and may pose risks to both public health and the environment. For decades, the sight of thick white fog drifting through streets has created a sense of action and reassurance. However, according to Ferreira, this method offers only temporary and superficial results. “Thermal fogging is often more about mosquito control theatre than actual public health,” he states. “It only works if the chemical directly hits a mosquito mid-flight. Once the smoke clears, mosquitoes that were hiding quickly return.”

Ferreira highlights several key concerns associated with continued reliance on fogging. One major issue is the emergence of insecticide-resistant “super mosquitoes,” as repeated exposure eliminates weaker insects while allowing stronger ones to survive and multiply. Additionally, most fogging chemicals are neurotoxic, posing potential risks to humans, pets, birds, and beneficial insects such as bees and butterflies. The indiscriminate nature of fogging can also disrupt ecological balance by eliminating natural mosquito predators like dragonflies, ultimately leading to population rebounds. Instead, Ferreira advocates for a transition towards Integrated Mosquito Management (IMM), with a strong emphasis on source reduction and ecological restoration. “The most effective protection starts at home. Eliminating stagnant water is far more impactful than waiting for fogging operations,” he explains. He recommends several practical measures, including ensuring proper drainage in waste containers, identifying hidden breeding sites such as gutters and septic tanks, and promoting ecosystems that support natural predators like fish, frogs, bats, and dragonflies. These solutions provide continuous, chemical-free mosquito control. Through Exterminators PLC and Sentario UK Limited, Ferreira is also driving a digital transformation in pest management by introducing AI-powered monitoring systems and sustainable prevention strategies. He emphasises the importance of balancing economic growth with environmental responsibility. “With over three decades in the global pest management industry, we must rethink our approach. Restoring ecosystems is not just an environmental priority, it is essential for long-term public health,” Ferreira added. Marlon Ferreira is a seasoned entrepreneur and circular economist with over 33 years of experience. He leads Exterminators PLC, Asia’s first publicly listed and carbon-neutral pest management company, and Sentario UK Limited, a UK-based pest-tech firm focused on innovative, environmentally responsible solutions.