Pests and pest control in Peoria, IL

Pests to know in Peoria

• Mosquito
• Rats and mice
• Eastern Bloodsucking Conenose
• Subterranean termites
• American Dog Tick
• Spotted Lanternfly
• Western Yellowjacket

Why each one matters here is cited in the sections below.

Termites in Peoria

• Illinois Extension notes that termites travel between their colony in the soil and their wood food source, and that finding winged termites indoors or outdoors is a red flag to have a home inspected.^[5]
• The Illinois Department of Public Health advises that termites eat wood very slowly, so homeowners have plenty of time to make an informed decision about treatment.^[6]

Invasive species reported here

The Illinois Department of Agriculture asks anyone who sees or suspects spotted lanternfly to report it to lanternfly@illinois.edu.^[9]

Pests local experts flag

• Peoria's health department names West Nile virus and La Crosse encephalitis as diseases that mosquitoes may spread in Peoria County.^[1]
• The City of Peoria offers rat abatement at no cost: residents call 309-494-8600 with their name and address, and a local exterminator sets bait outside the property within two weeks.^[3]

Climate

Central Peoria (ZIP 61602) is in USDA plant hardiness zone 6a, where the average coldest winter night is -10 to -5°F.^[12]

Public agencies that handle pests

• The Peoria City/County Health Department's vector control program monitors mosquito pools, birds and mammals for West Nile virus, and also offers community education and larvicide distribution.^[1]
• Peoria's health department says bed bugs are increasing in Illinois after a sharp decline in the 1940s and 1950s, pointing to more worldwide travel and less effective modern insecticides.^[2]
• According to the Illinois Department of Public Health, West Nile virus was first identified in Illinois in September 2001, in two dead crows found in the Chicago area.^[10]

Hiring a licensed company

The Illinois Department of Public Health licenses structural pest control businesses, and a business must employ at least one certified technician before it can obtain a license.^[7]

Licensing agency: Illinois Department of Agriculture — Bureau of Environmental Programs^[13].

See also how to check a pest control license.

Free local help

Illinois Extension says the bloodsucking conenose, the most commonly encountered kissing bug in Illinois, lives mainly in the southern half of the state; only one has been found north of Peoria and McLean counties.^[4]

Through the year

Spring to Fall

In Illinois, adult American dog ticks are most active in April, May and June, and by September they are inactive and rarely seen.^[8]

Spring to Summer

Illinois Extension says yellowjacket nests may hold thousands of workers by late summer, which is when the wasps can begin causing problems.^[11]

Sources

1. Peoria City/County Health Department, “Mosquitoes.” www.pcchd.org/161/Mosquitoes (accessed 2026-10-06)
2. Peoria City/County Health Department, “Bed Bugs.” www.pcchd.org/160/Bed-Bugs (accessed 2026-10-06)
3. City of Peoria, “Rat Abatement Program.” peoriagov.org/178/Rat-Abatement-Program (accessed 2026-10-06)
4. University of Illinois Extension, “Separating fact from fear: Kissing bugs in Illinois.” extension.illinois.edu/blogs/good-growing/2025-09-26-separating-fact-fear-kissing-bugs-illinois (accessed 2026-10-06)
5. University of Illinois Extension, “Swarming insects season.” extension.illinois.edu/blogs/over-garden-fence/2019-06-05-swarming-insects-season (accessed 2026-10-06)
6. Illinois Department of Public Health, “Pest Control - Do It Yourself or Hire a Pro?.” dph.illinois.gov/topics-services/environmental-health-protection/structural-pest-control/selecting-pest-control-service.html (accessed 2026-10-06)
7. Illinois Department of Public Health, “Structural Pest Control.” dph.illinois.gov/topics-services/environmental-health-protection/structural-pest-control.html (accessed 2026-10-06)
8. Illinois Department of Public Health, “Common Ticks.” dph.illinois.gov/topics-services/environmental-health-protection/structural-pest-control/common-ticks.html (accessed 2026-10-06)
9. Illinois Department of Agriculture, “Spotted Lanternfly.” agr.illinois.gov/insects/pests/spotted-lanternfly.html (accessed 2026-10-06)
10. Illinois Department of Public Health, “West Nile Virus (WNV).” dph.illinois.gov/topics-services/diseases-and-conditions/west-nile-virus.html (accessed 2026-10-06)
11. University of Illinois Extension, “Why are there so many yellowjackets in the fall?.” extension.illinois.edu/blogs/good-growing/2024-08-30-why-are-there-so-many-yellowjackets-fall (accessed 2026-10-06)
12. USDA ARS and PRISM, via phzmapi.org, “Plant hardiness zone for ZIP 61602 (2023 USDA map data).” phzmapi.org/61602.json (accessed 2026-10-06)
13. National Pesticide Information Center, “State Pesticide Regulatory Agencies.” npic.orst.edu/reg/state_agencies.html (accessed 2026-10-06)