Pests and pest control in Santa Rosa, CA

Pests to know in Santa Rosa

Roof Rat · Ticks · Western Yellowjacket · Subterranean termites

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

Termites in Santa Rosa

UC IPM says dampwood termites are common in central and northern coastal California and need high-moisture wood, often wood touching soil.^[8]

Pests local experts flag

Two rat species cause most problems around homes in Sonoma and Marin counties: the roof rat and the Norway rat.^[3]

Climate

Central Santa Rosa (ZIP 95404) is in USDA plant hardiness zone 9b, where the average coldest winter night is 25 to 30°F.^[11]

Public agencies that handle pests

• The Marin/Sonoma Mosquito & Vector Control District destroys in-ground yellowjacket nests at no charge for Sonoma County residents, provided the resident has already found and marked the nest.^[1]
• Sonoma County residents can book a free rodent inspection from the vector district, though its technicians do not trap, poison, remove dead rodents or do exclusion work.^[2]
• The local vector district says ticks stay active all year in Sonoma and Marin counties, and it names Lyme disease as a tick-borne illness of local concern.^[4]
• In Marin and Sonoma counties, mosquitoes are known to pass West Nile virus to people and dog heartworm to some animals.^[7]

Hiring a licensed company

California's Structural Pest Control Board lets the public search its Wood Destroying Organism system to see whether a property was inspected within the last two years.^[9]

Licensing agency: California Environmental Protection Agency — Department of Pesticide Regulation^[12].

See also how to check a pest control license.

Free local help

UC IPM notes yellowjacket colonies usually last a single season, and in fall the foraging workers mostly scavenge, showing up at picnics, garbage cans and outdoor pet food.^[10]

Through the year

Summer to Fall

Western black-legged ticks molt into adults in late summer and begin looking for hosts in late fall, per the Marin/Sonoma vector district.^[5]

Spring to Fall

Ground-nesting yellowjacket queens start new nests in spring, and colonies keep growing through summer into fall before rain or freezing weather usually ends them.^[6]

Sources

1. Marin/Sonoma Mosquito & Vector Control District, “Yellowjacket Control Program.” www.msmosquito.org/yellowjacket-control-program (accessed 2026-10-06)
2. Marin/Sonoma Mosquito & Vector Control District, “Rodent Program.” www.msmosquito.org/rodent-program (accessed 2026-10-06)
3. Marin/Sonoma Mosquito & Vector Control District, “Rats.” www.msmosquito.org/rats (accessed 2026-10-06)
4. Marin/Sonoma Mosquito & Vector Control District, “Ticks.” www.msmosquito.org/ticks (accessed 2026-10-06)
5. Marin/Sonoma Mosquito & Vector Control District, “Western Black-legged Tick.” www.msmosquito.org/western-black-legged-tick (accessed 2026-10-06)
6. Marin/Sonoma Mosquito & Vector Control District, “Yellowjackets.” www.msmosquito.org/yellowjackets (accessed 2026-10-06)
7. Marin/Sonoma Mosquito & Vector Control District, “Mosquitoes.” www.msmosquito.org/mosquitoes (accessed 2026-10-06)
8. UC Statewide Integrated Pest Management Program (UC ANR), “Pest Notes: Drywood Termites.” ipm.ucanr.edu/home-and-landscape/drywood-termites/ (accessed 2026-10-06)
9. California Structural Pest Control Board, “Termite Inspection Information.” www.pestboard.ca.gov/howdoi/terminspect.shtml (accessed 2026-10-06)
10. UC Statewide Integrated Pest Management Program (UC ANR), “Pest Notes: Yellowjackets and Other Social Wasps.” ipm.ucanr.edu/home-and-landscape/yellowjackets-and-other-social-wasps/ (accessed 2026-10-06)
11. USDA ARS and PRISM, via phzmapi.org, “Plant hardiness zone for ZIP 95404 (2023 USDA map data).” phzmapi.org/95404.json (accessed 2026-10-06)
12. National Pesticide Information Center, “State Pesticide Regulatory Agencies.” npic.orst.edu/reg/state_agencies.html (accessed 2026-10-06)