01/23/2025
Were you hoping freezing weather now means fewer mosquitoes in the summer?
Unfortunately, we must tell you that the general impact of this type of cold weather DOES NOT lead to fewer insect pests like mosquitoes in the summer.
Most of the insect pests we have here also occur, and survive, much farther north, where temperatures like we just experienced are just normal winter weather. This applies to the mosquito species we have as well.
Keep reading if you really want to know more...
Insects use various strategies to survive the winter. Some, such as Monarch butterflies, leave the area, but most have a particular life stage in which they spend the winter.
Eastern tent caterpillars overwinter as egg masses on pencil-sized tree twig--where they are exposed to ambient winter temperatures even into Canada without freezing to death.
Others, like giant leopard moths, overwinter as partly grown caterpillars. Some moths, such as polyphemus moths overwinter in cocoons on tree twigs, where again they are exposed to ambient winter temperatures of the area, while others, like to***co hornworms overwinter as pupae in the soil, where the soil provides insulation from winter temperatures.
Still others overwinter as adult insects in protected locations such as under tree bark or leaf litter; stink bugs and squash bugs are examples. In most of these cases, where the insects are still exposed to sub-freezing temperatures, they adapt by having various "antifreeze” substances in their "blood" to keep them from freezing and producing ice crystals which could rupture their cells.
Most insects are well-adapted to survive winter weather in their native land, but there are some species that are not so well adapted. Two examples: Southern green stink bugs and red-banded stink bugs.
Fire ants are also affected by severe winter weather, but it takes freezing the ground to deeper than where they are in their underground mounds to affect them, and it usually does not freeze that deep here. This is why we think they won't spread much farther than the northern edge of Tennessee.