Natural Ways to Treat Termites: A DIY vs. Professional Guide

You found something. A pellet pile near a window frame. A mud tube along the foundation. Wings on the bathroom floor after a warm morning. Now you want to know what natural methods work before you call a pest control company.

Termite damage costs U.S. homeowners billions every year. Rutgers University estimates yearly termite control spending above $1.5 billion nationally, with damage estimates ranging from $5 billion to $40 billion a year. That scale exists because most infestations spread for months before anyone notices.

Some natural remedies do kill individual termites in specific, accessible spots. None of them eliminate a full colony. Which ones are worth trying depends almost entirely on the termite species behind your problem, and most guides list remedies without covering this first.

Start here, before you try anything.

Which Termite Species Are You Dealing With?

Los Angeles has two main termite species. They live in different places, and a remedy effective on one usually does nothing to the other. Applying a drywood remedy to a subterranean infestation wastes weeks while the colony keeps feeding.

Use this table to match what you found to the likely species:

If you found mud tubes anywhere on the property, skip the remedy sections below and move straight to the professional escalation checklist. No natural remedy penetrates soil. A subterranean colony sits underground, sometimes 20 to 70 feet down, and every method in this guide reaches only the termites it physically touches.

For a full breakdown of species identification, see our guides on drywood termites in Los Angeles and subterranean termites in Los Angeles.

Natural Remedies With Real, Limited Effect

These methods kill individual termites on contact. None of them eliminate a colony. Use them only for a small, early stage, fully accessible drywood infestation, or as a temporary step while you arrange a professional inspection.

Borax (Boric Acid)

Borax, also called sodium borate, kills termites that ingest it by disrupting their digestive and nervous systems. It affects both drywood and subterranean termites, but only the ones that consume it directly.

Apply it as a powder on accessible infested wood, or dissolve it in water and spray. Reapply every two to three days for at least a week. Wear gloves and a mask, since boric acid irritates skin and lung tissue. Keep it away from children and pets.

Borax has no transfer effect. Unlike professional termiticides such as fipronil, it doesn’t spread through the colony by grooming or feeding contact. Any termite skipping direct ingestion stays unaffected, including the queen deep inside the colony.

Diatomaceous Earth

Food grade diatomaceous earth works through physical action, not chemistry. It’s made of tiny, sharp edged particles that cut through a termite’s waxy shell. The termite loses moisture and dehydrates within 24 to 48 hours.

Apply a thin layer in cracks, crevices, and along baseboards with confirmed activity. Wear a mask, since inhaled diatomaceous earth irritates lungs. Outdoors, apply a 2-inch layer around foundation entry points.

It only affects termites crossing the treated surface directly. As a surface treatment in visible, accessible areas, it works. As colony control, it doesn’t. It won’t penetrate enclosed wood, wall voids, or soil.

Orange Oil (D-Limonene)

Orange oil contains d-limonene, which dissolves the waxy coating on a termite’s exoskeleton on direct contact. One UC Berkeley study found 68 to 96% mortality in directly injected termite galleries.

This number sounds high, but it only applies to termites inside the specific gallery you drill and inject. A drywood colony spreads through multiple rafter bays and wall cavities. Few homeowners reach all of them without proper inspection equipment, so the kill rate across a full colony runs far lower than the lab figure in any real infestation.

Orange oil is worth trying only for a confirmed, accessible, isolated gallery: one exposed rafter section, or a single piece of furniture. Drill small holes at infested points, inject the oil with a syringe, and seal each hole. Repeat for every opening you reach.

Orange oil does not work on subterranean termites. It doesn’t penetrate soil. If you found mud tubes, orange oil is the wrong product.

Our inspectors use radar and camera-guided technology to map the full extent of drywood infestations without speculative drilling. Orange oil treatment applied after a proper scan works far better than orange oil applied without a map of where the colony sits.

Neem Oil

Neem oil comes from the seeds of the neem plant. Termites that ingest it experience disruption to molting and reproduction. Applied to wood surfaces with confirmed activity, it works as a mild deterrent.

It won’t kill termites reliably on contact, reach enclosed areas, or eliminate a colony. Treat it as a surface deterrent that slows local feeding, not a control method for an active infestation.

Wet Cardboard Trap

Corrugated cardboard contains cellulose, the material termites eat. Wet cardboard combines moisture and cellulose, making it attractive to foraging drywood termites.

Place damp cardboard near suspected activity and leave it for two to three days. Once termites cluster on it, remove it outdoors right away and burn it or seal it in a bag.

This method works better as a diagnostic tool than a control method. It shows where activity concentrates. Use the result to direct treatment or inform a pest control inspector.

Soapy Water and White Vinegar

Both kill individual termites on contact. Soapy water blocks the pores a termite breathes through. Vinegar kills through its acidity on direct contact.

Mix six tablespoons of dish soap with eight cups of water in a spray bottle. Use vinegar straight, or diluted 1:1 with water.

These methods kill the termite in front of you. Hundreds or thousands more stay inside the wall or underground for every one you kill this way. They carry no meaningful effect on an infestation and no lasting protection. Use them on the few termites you see, not as a control strategy.

Physical Barriers: The Natural Method Most Guides Skip

Chemical-free barriers stop termites without touching your family or pets. Builders in Australia have used graded stone barriers under and around foundations for decades. Particle size matters here: too large or too small, and termites tunnel through anyway. At the right grade, termites are unable to move the stone and stop digging once they meet it.

This method works best during new construction or a major remodel, when the barrier goes in before the slab is poured. Retrofitting an existing foundation with a stone barrier is possible but disruptive and costly compared to a soil termiticide treatment. For most existing Los Angeles homes, professional soil treatment achieves the same barrier effect without excavation.

If you’re planning new construction, ask us about physical barrier options alongside our standard Bora-Care pre treatment.

What Doesn’t Work, and Why People Keep Recommending It

Ammonia kills termites it touches but never reaches the colony. Indoor fumes are hazardous. Not worth trying.

Essential oil sprays and diffusers (clove, tea tree, garlic, lavender) sometimes mildly deter individual termites at treated surfaces. They carry no effect on established colonies. Termites route through wood pathways no surface spray reaches.

Sunlight exposure occasionally helps with a single infested piece of furniture. A chair or table left in direct sun for several hours kills some termites inside it. It’s useless for any infestation inside walls or framing.

Beneficial nematodes are parasitic roundworms sold as an eco-friendly option. In theory, they enter and kill termites. Los Angeles soil temperature, moisture levels, and clay-heavy composition during dry summer months make survival difficult to maintain. Failure rates in Southern California run high enough that nematodes aren’t a reliable primary or supplemental method for an active infestation.

Flooding underground nests doesn’t work. Subterranean colonies in Los Angeles reach 20 to 70 feet deep, with tunnel networks spanning hundreds of feet. A garden hose never reaches the colony or the queen.

Birdbaths, free range chickens, and backyard predators sound appealing, and some homeowners swear by them. None of them address an active infestation inside a structure. Birds and chickens eat swarmers they catch outdoors. They never touch the colony feeding on your framing.

Prevention: Where Home Action Has a Lasting Effect

Prevention won’t eliminate an infestation already underway, but it’s the one area where home action carries a real, lasting effect on termite risk in Los Angeles. Inspectors across the city see the same contributing conditions on nearly every property they visit.

Fix moisture sources first. Wet soil under the foundation is the top attractant for subterranean termites. Aging irrigation lines and older plumbing create slow leaks that saturate foundation soil for months unnoticed. Fix leaks and drips as soon as they appear.

Eliminate wood-to-soil contact. Firewood against the house, wood fence posts in direct soil contact, and wood garden beds against the foundation all create direct entry points. Move firewood at least 20 feet from the structure. Replace wood posts with metal bases where possible.

Pull mulch back from the foundation. Keep mulch at least 6 inches from the foundation and siding. Mulch holds moisture and provides cellulose, and both attract termites.

Address roof and attic moisture. Drywood termites infest wood with raised moisture content. A slow roof leak or poor attic ventilation raises rafter moisture above the level drywood termites prefer. Fix leaks and check ventilation, particularly in homes built before 1950.

Seal foundation cracks and utility penetrations. Subterranean termites enter slab homes through expansion joints, utility gaps, and foundation cracks. Sealing these points removes access routes.

Schedule annual inspections. Early-stage infestations cost far less to treat than advanced ones. Licensed inspectors in Los Angeles offer free inspections that show what’s happening before the colony has months more to expand.

How to Tell If a Natural Remedy Is Working

Signs pointing to a stable situation, for a small, early stage, accessible infestation only:

• No new frass in the treated area after two to three weeks
• A mud tube you broke stays broken after 48 hours
• No new hollow sound when you tap surrounding wood

Signs the remedy isn’t working:

• New frass appears after one to two weeks of traetment
• A broken mud tube repairs itself within 48 hours, a sign of an active subterranean colony no natural remedy reaches
• New swarmers appear indoors
• Hollow sounding wood spreads to new areas
• You aren’t able to locate the infestation visually; without a visual location, treatment isn’t possible.

When to Stop DIY and Call a Professioanl

Natural remedies make sense only when every one of these is true:

• The infestation surfaced within the last few weeks, not months
• Only one small, fully accessible wood member is affected
• No mud tubes exist anywhere on the property
• No frass or hollow wood shows in multiple locations

Call a licensed inspector right away if any of these apply:

• Mud tubes exist anywhere on the property
• Multiple areas show frass deposits or hollow sounding wood
• You don’t know how long the infestation has been active
• A remedy attempt hasn’t stopped new frass production after three to four weeks
• Your WDO inspection report shows Section 1 findings
• You’re buying or selling and need Section 1 clearance for escrow

Professional termite inspections in Los Angeles are free and take under an hour. The inspection identifies species, location, and extent: the three facts you need before any treatment decision, DIY or professional. There’s no downside to getting one before continuing with natural remedies.

For a full comparison of professional treatment options and costs, see our termite treatment cost guide and our guide on types of termite treatments.

Natural Remedies vs. Professional Treatment

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