About Mosquitoes

Understanding Mosquitoes: The Persistent Intruders


Mosquitoes are more than just a summer nuisance; they are a significant public health concern. Renowned for their itchy bites, these pests are vectors for dangerous diseases like Dengue, Zika, West Nile virus, and Malaria. For property owners, understanding mosquito behavior is essential for creating a safe, comfortable, and bite-free environment.


Why and How Mosquitoes Invade Properties


Mosquitoes enter residential and commercial properties seeking two main resources: blood meals and breeding grounds.

  1. Attracted by Human Cues: Female mosquitoes track hosts from afar by detecting exhaled carbon dioxide, body heat, moisture, and skin odors (like lactic acid).
  2. Sneak Entrances: They easily breach indoor spaces through propped-open doors, torn window screens, or gaps around air conditioning units.
  3. Wind-Assisted Flight: While mosquitoes are weak fliers, they often use gentle wind currents to drift over fences and into sheltered yards.


Conditions That Favour Mosquito Infestations


Mosquito populations thrive when a property provides specific environmental advantages:

  1. Stagnant Water: This is the single biggest factor. Mosquitoes need standing water to lay eggs; even a bottle cap filled with rainwater can host hundreds of larvae.
  2. Overgrown Vegetation: Tall grass, dense bushes, and unkempt shrubs offer shade and humidity, protecting adult mosquitoes from dehydration during hot daytime hours.
  3. Debris and Clutter: Discarded tires, clogged gutters, open trash bins, and plant saucers trap rainwater and create hidden breeding oases.


Highlights of the Mosquito Lifecycle


Mosquitoes undergo a rapid, four-stage complete metamorphosis that can take as little as 7 to 10 days in warm weather:

  1. Eggs: Females lay up to 200 eggs at a time directly on stagnant water or in damp soil prone to flooding. Some species' eggs can lay dormant for months waiting for water.
  2. Larvae (Wigglers): These aquatic creatures hatch and live just beneath the water's surface, feeding on organic matter and breathing through specialized air tubes.
  3. Pupae (Tumblers): A non-feeding transitional stage where the insect develops into its adult form inside a protective casing, remaining highly active in the water.
  4. Adults: Once emerged, males feed exclusively on plant nectar. Mated females hunt for blood meals, using the protein to develop their next batch of eggs.


Techniques to Control and Prevent Mosquitoes


Controlling mosquitoes requires breaking their breeding cycle and eliminating their daytime resting spots:

  1. Source Reduction: Empty, turn over, or cover items that hold water weekly—such as birdbaths, pet bowls, flowerpot saucers, and rain barrels.
  2. Gutter Maintenance: Clean roof gutters regularly to prevent leaves from trapping standing water high above the ground.
  3. Landscape Management: Keep lawns mowed short and trim back dense shrubbery to eliminate shaded resting zones for adult mosquitoes.
  4. Structural Exclusion: Install or repair tight-fitting mesh screens on all windows and doors, and keep un-screened openings closed.
  5. Biological Control: Bacillus thuringiensis israelensis (BTI) dunks or granules are used in permanent water features like ponds to kill larvae without harming wildlife.
  6. Targeted Residual Sprays: Apply professional exterior treatments to the undersides of leaves and shaded areas where adult mosquitoes rest during the day.