Galleria

Fabricius, 1798

greater wax moth, honeycomb moth

Species Guides

Galleria mellonella(Greater Wax Moth)

Galleria is a of snout moths (Pyralidae) containing only Galleria mellonella, commonly known as the greater wax or honeycomb moth. The is globally distributed and notorious as a pest of colonies, where larvae tunnel through combs consuming wax, pollen, and honey. are ; females enter hives after dark to lay in cracks and crevices. The larvae have gained scientific prominence as an alternative model organism for studying - interactions, immunology, and antimicrobial therapies, and have shown remarkable ability to degrade polyethylene and polystyrene plastics.

Galleria mellonella by (c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda. Used under a CC-BY license.

Galleria mellonella (3297813293) by Donald Hobern from Copenhagen, Denmark. Used under a CC BY 2.0 license.

Galleria mellonella P1250686a by
xpda. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Galleria: /ɡæˈlɪəriə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Galleria mellonella is distinguished from the lesser wax moth (Achroia grisella) by its larger size— wingspan approximately 30–40 mm compared to 13–20 mm for A. grisella. Larvae of G. mellonella are larger and more robust, with well-developed adapted for chewing wax. Adults have grayish-brown forewings with a distinctive snout-like projection formed by elongated labial palps, characteristic of the Pyralidae . Males produce ultrasonic sound pulses during courtship, a trait not reported in A. grisella.

Images

Habitat

Natural includes colonies and nests; also found in stored equipment and inadequately maintained wax comb storage. In laboratory settings, reared on honeycomb frames or artificial diets.

Distribution

distribution; found throughout the world wherever honey bees are kept. Records include North America (United States, Canada), Europe (Denmark, Norway, Sweden, United Kingdom, Italy, Germany, Russian Federation), Asia (China, Japan, Korea, India), and other regions. Commercially reared in northern USA and Europe for research and fish production.

Seasonality

laid in spring; active year-round in temperate climates, with peak activity during warmer months. Females fly to hives one to three hours after dark and depart shortly before daylight.

Diet

Larvae feed on honeycomb wax, pollen, honey, and cocoon silk; do not feed. Laboratory studies have documented larval consumption of synthetic polymers including polyethylene and polystyrene.

Life Cycle

Four life stages: , larva, pupa, . Eggs laid in cracks and crevices of hives; larvae tunnel through combs, lining tunnels with silk. Larvae pass through five to six instars. occurs in silk cocoons. Adult lifespan 3–30 days; females produce fewer than 300 eggs on average, though some may lay up to 2000. Developmental temperature thresholds: eggs survive 45°C for one hour with 0% mortality; larvae experience 83.3% mortality at 45°C; 100% mortality of all stages with 2–3 hour exposure at 45°C.

Behavior

activity pattern in . Females exhibit hive-seeking , entering colonies after dark to oviposit. Larvae display negative : at 35°C remain on frames feeding; at 50–55°C, more than 98% move to cold compartments within 15–20 minutes. This thermal response has been exploited for mechanized sorting in laboratory rearing. Larvae produce silk for tunnel lining and cocoon construction.

Ecological Role

Pest of weak or poorly maintained colonies; presence often signals underlying colony stress such as queenlessness, , or starvation. In natural , may contribute to decomposition of abandoned nests. Increasingly used in scientific research as a replacement for mammalian models in immunology, microbiology, toxicology, and drug efficacy studies due to functionally similar innate immune responses.

Human Relevance

Major economic pest in apiculture; beekeepers combat through freezing frames, airtight storage, and chemical treatments. Larvae commercially produced as fish and animal feed. Scientific applications include: model organism for studying bacterial and fungal (including Staphylococcus aureus ), testing - combination therapies, production of and chitosan for medical and cosmetic applications, and investigation of plastic biodegradation mechanisms.

Similar Taxa

Achroia grisellaLesser wax moth; smaller size (wingspan 13–20 mm vs. 30–40 mm), less destructive to colonies, lacks ultrasonic communication in males.
Dioryctria spp.Cone in same Pyralidae; differ in association (pine cones vs. hives), geographic distribution, and lack plastic degradation capabilities.