The holiday season is a time when we open our doors to family and friends, both two-legged and four-legged. Unfortunately, this openness can also welcome unexpected guests—those with six, eight, or even more legs. These pests often seek shelter from the cold or hitch a ride indoors on items brought in from outside.

Some of the most notable sources of pest incursions include plants brought in for winter protection, firewood, and Christmas trees:

• Sap-Feeding Insects: Aphids, adelgids, psocids, and scale insects are commonly found on ornamental plants. These pests feed on plant sap and excrete a sticky substance called honeydew, which can lead to mildew growth. On conifers, this activity may cause needle discoloration or drop. Indoors, the lower humidity usually limits their survival. If found before decorating, washing the tree thoroughly is an easy and pesticide-free solution.

• Bark Beetles: These pests may invade trees before they are cut. Once inside, the warmer environment accelerates their development, and they create small holes in the trunk, often accompanied by sawdust. Despite concerns, these beetles do not infest furniture or structural wood in homes due to the dryness of indoor materials. Vacuuming is the best way to remove them.

• Bird Nests: While a nest in a tree might seem charming, it can harbor mites and parasites that survive long after the birds have gone. These pests can occasionally seek alternative hosts, including humans or pets. It’s best to avoid bringing nests indoors.

• Praying Mantids: Egg cases laid on outdoor plants may hatch prematurely if brought inside, leading to numerous nymphs. While most will not survive long, this can be an unwelcome surprise for homeowners.

Firewood Pests
Firewood can introduce various pests, including round-headed and flat-headed borers. These beetles often infest dying trees or firewood, and warmer indoor temperatures can prompt them to emerge. Though alarming in appearance, they do not reinfest indoor wood. Pesticides are unnecessary for these pests.

Ants in Potted Plants
Ants can nest in the soil of overwintering plants or between the pot and saucer. They may go unnoticed unless actively seeking food or water. If honeydew-producing insects are also present, the ants have ample sustenance. Baits or soil-applied insecticides can effectively address the infestation.

Hunting Spiders
Wolf and jumping spiders thrive outdoors in warm months but may move indoors during winter in search of prey and shelter. They often inhabit crawlspaces, attics, garages, and even living areas. While beneficial in controlling other pests, many customers prefer their removal due to fear. Reducing food sources and using glue boards can help manage their presence. Spraying is generally ineffective against spiders as they rarely contact treated surfaces.

Overwintering Insects
Ladybugs, cluster flies, stink bugs, and wasps often seek indoor harborage for winter. Spikes in outdoor temperatures can activate these pests, leading them indoors through gaps. Vacuuming is a practical solution, though stink bugs may require a disposable vacuum to manage their odor. Light traps can effectively attract and capture these pests as they seek to return outdoors.

Educating Customers
Regardless of the winter invader, education is essential. Help customers understand the biology and behavior of pests, as well as the best methods for reducing their numbers. While complete elimination is unlikely, pest activity typically subsides by spring, restoring normalcy.

By fostering understanding and providing practical solutions, pest control professionals can help customers manage these unwelcome holiday guests effectively.