Pima County, Arizona

Scorpion, Termite and Monsoon Pest Help Across Tucson

Tucson sits at about 2,640 feet, ringed by five mountain ranges, with the Santa Cruz River and the Rillito dry for most of the year until heavy rain sends water down them. That rhythm decides which pests reach your door, and when.

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Tucson is the seat of Pima County and home to about 542,600 people as of the 2020 census, spread across the desert floor with the Santa Catalina, Tortolita, Rincon, Santa Rita and Tucson Mountains on every side. Its housing runs from the 1880s adobe row houses of Barrio Libre, just south of downtown, to the streets of Sam Hughes, Iron Horse and West University around the University of Arizona in midtown.

That range of construction matters. Thick adobe walls, aging wood framing and hollow block yard walls each give scorpions, termites and rodents a different way in, and large parts of the city have no storm sewers, so summer downpours flush scorpions and roaches out of hiding. Precision Pest Control treats Tucson houses, rentals and businesses with eco-friendly products, starting with a look at how your home was built.

Pests in Tucson

Arizona bark scorpions

University of Arizona entomologists cite research placing Tucson second only to Phoenix nationwide for scorpion stings per person. The species behind those numbers is the Arizona bark scorpion, the only scorpion in the United States of medical concern. By day it wedges into crevices, and research found it strongly prefers hollow block walls over other shelter around a yard. It gets indoors under loose door sweeps, through window vents and up through weep holes in stucco. Young children who are stung should get medical help right away.

Desert subterranean termites

Cooperative Extension ranks Heterotermes aureus, the desert subterranean termite, as the number one urban economic pest in Arizona and the most common underground termite in the Sonoran Desert below 4,000 feet, which covers every part of Tucson. Workers travel inside narrow, nearly airtight mud tubes up foundations and through hidden expansion joints to reach lumber, trim and sheetrock. Arizona colonies tend to swarm in mass the night after a substantial summer rain, so a pile of shed wings on a windowsill in July deserves a closer look.

Pack rats and kissing bugs

A single woodrat den can stand 3 to 5 feet high, a heap of twigs and cholla pieces hiding several chambers, and the animals sometimes move into attics, walls and the engine bays of parked cars. Those middens are common breeding sites for kissing bugs, and extension researchers note that Triatoma rubida is most prevalent in the foothill regions of Phoenix and Tucson. Adults fly toward porch lights from May through July. Repeat bites can lead to serious allergic reactions, so a den against the house should go.

American cockroaches

The American cockroach is the largest and most common roach in Arizona. In the Southwest it lives mainly in sewer lines and inside in-ground boxes for water meters, irrigation valves and electrical connections. Cooler nights and long wet spells both push it indoors, where it heads for kitchens and bathrooms. Keeping drain traps full or capped, fixing plumbing drips and replacing worn door sweeps closes most of the routes it uses to reach your living space.

The pest year in Tucson

Spring, March to May
Bee swarms start moving as desert trees and wildflowers bloom, and bark scorpions leave their winter clusters once nights warm up. Kissing bugs begin dispersal flights in May, so it is a good month to screen weep holes, check door sweeps and switch porch lights to LED bulbs.
Early summer, June
Daily highs in Tucson typically run from 98 to 102 degrees. Scorpions move toward shaded, protected spots to escape extreme heat, which often means block walls, garages and the gap under a door. Keep water off the foundation so they have fewer reasons to linger.
Monsoon, July to September
The first monsoon storms usually reach Tucson around July 3, and activity often lasts into September. Rain floods scorpions out of their refuges, termites swarm the night after a heavy storm, and standing water in pots, tires and pet bowls lets mosquitoes breed. Pima County advises emptying anything that holds water and changing outdoor pet water daily.

Adobe, block and stucco: how Tucson houses let pests in

Adobe homes in the downtown barrios were built nearly flush with the street, with plain detailing and courtyards behind thick walls. Cracks where old plaster meets newer repairs, gaps around original wood windows and doors, and roof lines with open seams give scorpions and roaches easy entry. We look for those seams first and seal what can be sealed.

Newer stucco and block construction has its own weak points. Weep screeds at the base of stucco walls, hollow block fences and in-ground irrigation boxes are ideal hiding spots for scorpions, bees and roaches. Our technicians check each of those, look for mud tubes along the slab and note any pack rat dens before treating.

Quick Quote (512) 561-7451

Where we work around Tucson

El Presidio
Barrio Viejo
Armory Park
Sam Hughes
West University
Iron Horse
Pie Allen
Dunbar Spring
Menlo Park
Tanque Verde

Tucson pest questions

Are bark scorpions in Tucson dangerous?

Yes, for some people. The Arizona bark scorpion is the only scorpion in the U.S. considered medically important, and stings can be serious for small children. Most healthy adults recover with pain relief, though a call to Poison Control is wise. Sealing gaps and treating hiding spots around the house cuts down on encounters.

When do termites swarm in Tucson?

Subterranean termites in Tucson usually swarm in summer, most often on the night after a strong monsoon rain. Winged termites inside the house, shed wings on sills or mud tubes on a foundation wall all suggest an active colony nearby. Drywood termites leave small piles of fecal pellets under tiny holes instead.

Why am I finding kissing bugs in my Tucson home?

Kissing bugs usually come from a pack rat den close to the house. Adults fly toward lights after dark from May through July, then slip through door gaps or torn screens and hide under furniture or between mattresses. Removing nearby dens, sealing gaps and using LED porch lights all help.

How much does a pest plan cost in Tucson?

Tucson plans begin at $57, and there is no charge to estimate. Your price reflects the lot size and which pests you are fighting. For a written number use /quote; to pick a visit day use /schedule-pest-control-service; for a quick answer by phone dial (512) 561-7451.

Get your Tucson home checked

Phone (512) 561-7451 today and we will build a plan around how your house is built and what keeps getting in.

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