Scorpion Control in Texas — Complete Guide

About Scorpions in Texas

Texas is home to approximately 18 scorpion species, but the striped bark scorpion (Centruroides vittatus) is overwhelmingly the most common and the species responsible for nearly all residential encounters and stings. Scorpions are arachnids — relatives of spiders and ticks — that have thrived in Texas for millions of years. They are nocturnal predators that feed on insects, spiders, and other small invertebrates.

Striped bark scorpions are found across the Hill Country, West Texas, South Texas, and increasingly in suburban developments around Austin, San Antonio, Dallas-Fort Worth, and other expanding metro areas. As housing construction pushes into rocky, rural terrain, homeowner encounters with scorpions have increased dramatically in recent decades.

Identifying the Striped Bark Scorpion

The striped bark scorpion is pale yellowish-tan with two dark longitudinal stripes on its back and a dark triangular mark on the head. Adults are 2 to 3 inches long including the tail. They are slender with relatively thin pincers. Unlike many scorpion species, striped bark scorpions are excellent climbers and can scale rough surfaces including stucco, brick, and tree bark — which is how they often end up inside homes, sometimes appearing on walls and ceilings.

UV Blacklight Detection

All scorpions fluoresce a bright blue-green under ultraviolet (UV) light, making blacklight flashlights the single most effective tool for detecting them. On a warm night, walk around your property with a UV flashlight to identify scorpion populations, entry points, and harborage areas. Check the foundation perimeter, exterior walls, around doors and windows, and in landscaping features like rock walls, mulch beds, and woodpiles. Indoor inspections should focus on baseboards, closets, bathrooms, and areas near exterior doors. A UV survey is the first step any pest control professional will perform when developing a scorpion treatment plan.

Scorpion Sting Symptoms and First Aid

A striped bark scorpion sting produces immediate, intense pain at the sting site — comparable to a wasp sting but often with a more prolonged burning sensation. Additional symptoms may include localized swelling, numbness or tingling that can radiate along the affected limb, and sensitivity at the sting site lasting 24 to 72 hours.

For healthy adults, first aid includes washing the area with soap and water, applying a cold compress for 10 to 15 minutes, and taking over-the-counter pain medication (ibuprofen or acetaminophen). Most stings resolve without medical intervention within 24 to 48 hours.

Seek immediate medical attention for children under 5, elderly individuals, or anyone experiencing severe symptoms including difficulty breathing, muscle twitching or spasms, excessive salivation or drooling, rapid eye movements, difficulty swallowing, or blurred vision. While fatalities from striped bark scorpion stings are extremely rare, severe reactions can occur in sensitive individuals.

How Scorpions Enter Homes

Scorpions can squeeze through gaps as narrow as 1/16 inch — thinner than a credit card. Common entry points include gaps beneath exterior doors (the number one entry point), cracks in the foundation, gaps around plumbing and electrical penetrations, weep holes in brick veneer, openings around window frames, and spaces where the roofline meets the wall. Scorpions are also carried inside on firewood, potted plants, boxes, and outdoor items stored against the house.

Treatment Methods

Perimeter Barrier Treatment

A residual insecticide is applied around the entire foundation perimeter, extending 3 to 5 feet up the exterior wall and 3 to 5 feet out from the foundation. This creates a lethal barrier zone that scorpions must cross to reach the structure. Products containing cyfluthrin, lambda-cyhalothrin, or deltamethrin provide 60 to 90 days of residual activity. Monthly treatments are recommended during peak scorpion season (April through October).

Crack and Crevice Sealing (Exclusion)

Sealing entry points is critical for long-term scorpion control. This includes installing door sweeps with rubber or brush seals on all exterior doors, caulking gaps around windows and utility penetrations, screening weep holes with fine mesh, and sealing foundation cracks. Professional scorpion exclusion costs $300 to $1,000 depending on the home.

Sticky Trap Monitoring

Glue boards placed along baseboards, in closets, near exterior doors, and in garages capture scorpions and provide valuable data about population levels and movement patterns. Traps help pest control professionals identify hot spots and evaluate treatment effectiveness.

Habitat Modification

Reducing scorpion harborage around the home is essential. Remove rock piles, landscape timbers, woodpiles, and debris within 10 feet of the foundation. Replace bark mulch with gravel or decomposed granite near the home. Prune tree branches and shrubs away from exterior walls. Eliminate ground-cover plants near the foundation that provide shelter for scorpions and their prey insects.

Scorpion Season in Texas

Scorpions are most active from April through October when nighttime temperatures remain above 70 degrees Fahrenheit. Peak indoor intrusion occurs in May and June as temperatures rise and scorpions seek cooler indoor environments, and again in September and October as they seek shelter before cooler weather. During winter months, scorpions enter a dormant state (diapause) and are rarely encountered indoors, though they may shelter in garages, attics, and wall voids.

Prevention Tips

• Install tight-fitting door sweeps on all exterior doors — this is the single most effective prevention measure.
• Seal all cracks and gaps in the foundation, around utility penetrations, and at window and door frames.
• Screen weep holes in brick veneer with fine stainless steel mesh.
• Remove rock piles, woodpiles, landscape timbers, and debris near the foundation.
• Replace bark mulch near the home with gravel or decomposed granite.
• Keep grass and vegetation trimmed short near the foundation.
• Use a UV blacklight regularly to monitor scorpion activity around your property.
• Shake out shoes, boots, and clothing left on the floor or in the garage before wearing.