Pests to know in Harrisburg
Termites in Harrisburg
Penn State Extension says eastern subterranean termites occur throughout Pennsylvania and often damage structural timbers in buildings.[4]
Invasive species reported here
- Dauphin County mosquito control staff have been responding to resident complaints about the Asian tiger mosquito, a relatively new species in Pennsylvania.[1]
- Pennsylvania's spotted lanternfly quarantine prohibits moving any life stage of the insect, including egg masses, nymphs and adults, and regulates items that may harbor it.[8]
Pests local experts flag
Dauphin County's mosquito surveillance focuses on Culex pipiens and Culex restuans, the species most often involved in the West Nile virus cycle.[1]
Climate
Central Harrisburg (ZIP 17101) is in USDA plant hardiness zone 7a, where the average coldest winter night is 0 to 5°F.[10]
Public agencies that handle pests
- Dauphin County's West Nile Virus Control Program is fully funded by the Pennsylvania DEP and run out of the Dauphin County Conservation District.[1]
- Dauphin County will test a dead crow, blue jay, hawk, eagle or owl for West Nile virus, but the bird must have died within the last 12-24 hours.[1]
- When weighing alternatives to biological and chemical pesticides, Dauphin County's West Nile program makes source reduction its primary goal.[2]
Local rules and responsibilities
Harrisburg's Property Maintenance Code, adopted from the 2018 International Property Maintenance Code, makes the owner, agent or operator of any structure responsible for eliminating insects, rodents and other pests.[3]
Hiring a licensed company
In Pennsylvania, a commercial/public pesticide applicator license is needed to use pesticides on another person's property.[7]
Free local help
Penn State Extension Master Gardeners in Dauphin County answer phone questions and help office visitors with plant and insect samples for identification or diagnosis.[6]
Through the year
- Spring to Summer
- Pennsylvania DEP funds local mosquito control programs to survey ticks from April through August, with DEP and county staff focusing on blacklegged tick nymphs.[5]
- Winter to Fall
- In Pennsylvania, spotted lanternfly eggs are laid from September to December and hatch from late April to June.[9]
Sources
- Swatara Township (Dauphin County West Nile Virus Control Program), “West Nile Virus.” swataratwp.com/west-nile-virus/ (accessed 2026-10-06)
- Dauphin County Conservation District, “Mosquito Control.” www.dauphincd.org/Mosquito%20Control/Mosquito%20Control.html (accessed 2026-10-06)
- City of Harrisburg, “Chapter 8-107 Property Maintenance Code.” ecode360.com/45150168 (accessed 2026-10-06)
- Penn State Extension, “Eastern Subterranean Termites.” extension.psu.edu/eastern-subterranean-termites (accessed 2026-10-06)
- Pennsylvania Department of Environmental Protection, “Tick Surveillance and Testing.” www.pa.gov/agencies/dep/programs-and-services/integration/vector-management/ticks (accessed 2026-10-06)
- Penn State Extension, “Services We Provide (Master Gardeners of Dauphin County).” extension.psu.edu/programs/master-gardener/counties/dauphin/services-we-provide (accessed 2026-10-06)
- Pennsylvania Department of Agriculture, “Pesticide Applicators, Registered Technicians, and Certification Exams.” www.pa.gov/agencies/pda/plants-land-water/plant-industry/pesticide-programs/pesticide-applicators-registered-technicians-and-certification-exams (accessed 2026-10-06)
- Pennsylvania Department of Agriculture, “Spotted Lanternfly Quarantine and Permitting.” www.pa.gov/agencies/pda/plants-land-water/spotted-lanternfly/spotted-lanternfly-quarantine-and-permitting (accessed 2026-10-06)
- Penn State Extension, “Spotted Lanternfly Management Guide.” extension.psu.edu/spotted-lanternfly-management-guide (accessed 2026-10-06)
- USDA ARS and PRISM, via phzmapi.org, “Plant hardiness zone for ZIP 17101 (2023 USDA map data).” phzmapi.org/17101.json (accessed 2026-10-06)
- National Pesticide Information Center, “State Pesticide Regulatory Agencies.” npic.orst.edu/reg/state_agencies.html (accessed 2026-10-06)