Most household gnats (drain flies, fungus gnats, fruit flies) do not bite. If you are being bitten outdoors, you may be dealing with biting midges (often called no-see-ums), which require a different control plan.

Why do gnats keep coming back after spraying?

Sprays often kill only the flying adults. If the breeding source remains—like drain buildup, damp organic material, overwatered soil, or trash residue—new gnats will continue to emerge.

What is the best way to get rid of gnats in houseplants?

Fungus gnats usually indicate consistently wet soil. Letting soil dry between waterings, removing decaying organic debris, and using targeted treatments for larvae provides the best results.

Gnats – D & D Pest Control & Home Inspection Services

Q: Are gnats the same as fruit flies?

Not always. Fruit flies are one type of small fly often called a gnat, but many indoor problems are caused by drain flies or fungus gnats. Correct identification is key to stopping breeding.

Q: Can gnats come from drains?

Yes. Drain flies and other small flies commonly breed in the organic sludge inside sink, floor, and shower drains. Cleaning and treating the drain source is usually required for full control.

Gnats

Why gnats are a problem in Eastern North Carolina

Gnats are a common nuisance across Eastern North Carolina, especially during warm, humid months. These tiny flying insects multiply fast, hover around people and food, and often signal excess moisture or sanitation issues inside a home or business. While small, gnats can become a big frustration when they show up in kitchens, bathrooms, houseplants, or commercial spaces.

Scientific Classification

Order: Diptera
Family: Sciaridae (fungus gnats), Psychodidae (drain flies), Drosophilidae (fruit flies)
Scientific Names: Varies by species

Overview

Gnats thrive in moist environments and organic material. In Eastern NC, humidity, frequent rainfall, and mild winters allow gnat populations to persist much of the year. One interesting fact: many “gnat” infestations are actually multiple species at once, each breeding in a different moisture source.

Quick Facts & Identification

Size: 1/16″–1/8″ long
Color: Black, dark gray, or brown
Features: Slender bodies, long legs, weak flyers, attracted to light and moisture

Common Life Stages

Egg
Larva
Pupa
Adult

Lifespan: Typically 2–4 weeks, but continuous breeding creates the illusion of never-ending gnats.

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Behavior & Habitat

Behavior: Flying nuisance, attracted to moisture and organic odors
Diet: Decaying organic matter, fungi, food residues

Preferred Environments

Overwatered houseplants
Sink and floor drains
Trash areas and recycling bins
Crawlspaces and damp bathrooms

Gnats are most active in spring through fall, but indoor infestations can occur year-round.

Signs of a Gnat Infestation

Small flies hovering around sinks, drains, or plants
Gnats flying near faces, lights, or computer screens
Larvae visible in wet soil or drain buildup

Why You Might Have Gnats

Excess moisture or humidity
Overwatered indoor plants
Organic buildup in drains
Improper trash storage
Crawlspace moisture issues common in Eastern NC

Risks & Damage

Health Risks

Gnats do not bite in most cases, but they can contaminate food surfaces and spread bacteria from drains and waste areas.

Property Damage

Gnats do not cause structural damage, but infestations often point to hidden moisture problems that can lead to mold or wood decay if left untreated.

Prevention Tips

Avoid overwatering houseplants
Clean and treat drains regularly
Seal garbage tightly and remove frequently
Fix plumbing leaks promptly
Reduce indoor humidity with dehumidifiers
Maintain crawlspace moisture control

Control & Treatment

DIY sprays and traps may reduce visible adults, but they do not eliminate breeding sources. Effective control requires identifying the species and treating the exact moisture source.

Professional Integrated Pest Management (IPM) focuses on:

Moisture source identification
Drain and organic matter treatments
Targeted insect growth regulators
Long-term prevention strategies

Frequently Asked Questions

Are gnats the same as fruit flies?

No. Fruit flies are one type of gnat, but many infestations involve fungus gnats or drain flies.

Do gnats bite?

Most household gnats do not bite, though biting midges (often called “no-see-ums”) are different insects.

Why do gnats keep coming back?

If moisture or breeding material remains, gnats will continue reproducing even after spraying.

Can gnats come from drains?

Yes. Drain flies and other gnats commonly breed in organic sludge inside pipes.

Call to Action

If gnats are taking over your home or business, it’s time to stop the breeding cycle—not just the flying adults.

D & D Pest Control Co.
Call today for professional gnat control and moisture evaluation
Serving homes and businesses throughout Eastern North Carolina