Where do Mosquitoes Lay Eggs?
Female mosquitoes lay their eggs on or near water, or in areas that will soon be exposed to water. As you might expect, that encom-passes much of the U.S., and with over 150 species in the country, there§ a great deal of variation among mosquitoes.
Very generally speaking, there are two types of mosquitoes—flood-water mosquitoes and freshwater/stagnant water mosquitoes. These names are informal, and since mosquitoes are quite opportunistic when depositing eggs, some species undoubtedly fit in both categories. Still, these categories are enough to give the layperson an idea of where mosquitoes lay their eggs—and how one can avoid giving mosquitoes places to deposit eggs.
As their name suggests, floodwater mosquitoes (which includes important Aedes species) lay their eggs in areas that are damp or that will be inundated by water, such as salt marshes or riverside forests. The eggs need to be inundated by water before they hatch, but reduction of dissolved oxygen in the water is the most important factor for egg hatch-ing’s. When levels drop beyond a certain point, the eggs hatch. This ensures that the larvae will be born into the shallow, food-filled areas where the larvae thrive.
These mosquitoes often become a scourge after river flooding or the storm surge of a hurricane.
Freshwater and Stagnant Water Mosquitoes
Some species, like the malaria-bearing Anopheles mosquitoes, only lay eggs on freshwater, whereas the notorious pest Culex pip-iens lays eggs’6 in stagnant water, everywhere from cesspits and plant pots to hoofprints in cow pastures. The invasive Asian tiger mosquito will deposit eggs nearly anywhere it can —and doesn’t venture far from where it hatches, so if a female of a pest species deposits eggs in the birdbath on your deck rail, you’re certainly on the dinner menu17. Perhaps surprisingly, flowing streams and deep ponds and lakes are often less ideal environments for most mosquito species, as they have less food, too much turbulence and more predators.
To make matters more complex, some mosquitoes are often referred to as “container” mosquitoes because they are found in a variety of natural or artificial containers. Mosquitoes found in natural containers are often referred to as “woodland” or “treehole” mosquitoes because they are found in wooded areas, and often deposit eggs near trees—or in cavities within them. When it rains, these holes fill in with water, and the eggs then hatch. There are many types of natural cavities—from rotting stumps to containers as specific as a particular type of pitcher plant. In fact, some mosquito species even lay their eggs in pitcher plants, which serve as natural cavities and catch rainwater An African Aedes species even lays its eggs on the legs of crabs, which then transport the eggs to the crab’s nest, where the eggs later hatch?”.
Of course, many?’ mosquitoes are just as comfortable depositing eggs in artificial containers such as gutters, tarps, birdbaths, and old tires. Oddly enough, many disease-transmitting mosquito species have been found developing in artificial containers in cemeteries. The vases, toys, and flowerpots left behind by mourners AdifOti er prove to be an ideal habitat for these Breed sometimes-deadly insects”.
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