Mortein has been at the forefront of science to deliver effective and safe protection from pests. In today's world, a simple mosquito bite can ruin lives. That's why we arm communities with the defenses they need against dengue, malaria, and zika. It's our purpose to protect families from the burn and damage of pest-borne diseases to help usher in a new world without them Mortein Naturgard Multi Insect Killer Citrus - Knockdown - Kills dengue mosquitoes - Effective protection against cockroaches, mosquitoes, flies Dengue is spread through the bite of the female mosquito (Aedes aegypti). Mortein NaturGard Flying Insect Killer is effective in killing Aedes mosquitoes.