Greater & Lesser Wax Moth

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PestControlBasics Editorial Team

Reviewed by Derek Giordano · Updated 2026

Illustrated identification guide — PestControlBasics.com

🔍 Identification

Greater Wax Moth (Galleria mellonella): Adults 12-20mm wingspan; grey-brown; females have hooked proboscis for piercing wax comb. Larvae (the damaging stage): cream-colored, 25mm, silk-webbing throughout comb.

Lesser Wax Moth (Achroia grisella): Smaller; silver-grey; similar damage pattern but less severe.

🧬 Biology & Behavior

Females enter hives at night to lay eggs in comb. Larvae burrow through comb, spinning silk tunnels that are nearly impossible to remove. A strong colony prevents entry — guard bees repel female moths. Only weak colonies, recently split hives, or stored equipment are vulnerable to wax moth damage.

⚠️ Damage & Health Risk

Destruction of drawn wax comb — the most valuable asset in beekeeping (takes years and enormous bee energy to produce). Complete destruction of comb in stored equipment. In weak colonies, wax moths can collapse the entire colony.

🔧 DIY Treatment

Strong colonies are self-defending. For stored equipment: freeze (0°F for 48 hours) destroys all life stages before storage. Para-moth (paradichlorobenzene) crystals in sealed storage. Certan (Bt aizawai) is an effective biological control applied to stored frames — harmless to bees.

👷 When to Call a Pro

Beekeeping supply companies sell wax moth prevention products. Apiary consultants can help design storage protocols for beekeeping operations.

❓ FAQ

Can a healthy bee colony get wax moths?

Strong, healthy colonies repel wax moth adults — guard bees prevent entry. Wax moths primarily affect weak colonies, those with reduced bee population (after disease, absconding, or splitting), or stored equipment without bees. Colony strength is the best prevention.

What does wax moth damage look like?

Silk webbing throughout the comb, tunnels burrowed through wax cells, larvae visible when frames are inspected, and a characteristic musty smell. Severely damaged comb collapses and is unusable.

Factor	Details
U.S. Range	All or most U.S. states
Regional Detail	Distribution varies — consult your local extension service for regional prevalence data.

Factor

Details

U.S. Range

All or most U.S. states

Regional Detail

Distribution varies — consult your local extension service for regional prevalence data.

📅 Treatment Timing Guide

Treating at the right time dramatically improves results. Pest control timed to the life cycle uses less product and achieves better long-term control.

Period	Action
Spring	Inspection and perimeter treatment before pest season starts.
Summer	Active monitoring and targeted treatments as needed.
Fall	Preventive treatment before overwintering pests seek entry.

Period

Action

Spring

Inspection and perimeter treatment before pest season starts.

Summer

Active monitoring and targeted treatments as needed.

Fall

Preventive treatment before overwintering pests seek entry.

💰 Professional Treatment Costs

Service Type	DIY Cost	Professional Cost
Initial inspection	Free (self-inspect)	$75–$150 (often credited to treatment)
One-time treatment	$30–$100 in materials	$150–$500
Annual service contract	N/A	$400–$900/year
Severe infestation	Often ineffective alone	$500–$2,500+

Service Type

DIY Cost

Professional Cost

Initial inspection

Free (self-inspect)

$75–$150 (often credited to treatment)

One-time treatment

$30–$100 in materials

$150–$500

Annual service contract

N/A

$400–$900/year

Severe infestation

Often ineffective alone

$500–$2,500+

Prices vary by region, property size, and infestation severity.

❓ Common Questions About 🦋 Wax Moth

How do I confirm I actually have this pest (not something similar)?

The most reliable confirmation is a physical specimen — capture one and compare to reference images on this page. For cryptic pests (bed bugs, termites), look for secondary signs: frass, shed skins, mud tubes, or bites with a specific pattern. When uncertain, a professional inspection is faster than months of misidentification.

Can I treat this myself or do I need a professional?

DIY is effective for small, accessible infestations caught early. Professionals are worth the cost when: the infestation is inside wall voids or structural elements, multiple rooms are affected, you have health-risk pests (hantavirus, venomous species), or DIY has already failed twice.

How long until the infestation is completely gone?

Expect 3–8 weeks for most infestations with proper treatment. Insects with dormant life stages (pupae, eggs) extend the timeline because those stages are impervious to most insecticides. Follow-up treatments at 2 and 4 weeks catch each new cohort as they emerge.

What's the most common mistake people make treating this pest?

Treating only the visible pest population while ignoring the harborage site, entry point, or breeding location. Killing adults provides temporary relief but the population rebuilds from hidden egg cases, pupae, or new arrivals through unaddressed entry points.

🦋 Wax Moth