Greater wax moth

Systematic position The Greater wax moth (Galleria mellonella) belongs to the order Lepidoptera and the family Pyralidae. It is a well-known pest that has evolved to thrive within the environment of honey bee colonies, utilizing hive resources for its development and sustenance.

Host materials This pest primarily affects honey bee products and equipment. It targets combs containing wax, pollen, and brood cocoons. Stored wax, old honeycombs, and uncleaned hives are particularly vulnerable to infestation, especially if they are not adequately protected or ventilated.

Biology and life cycle The insect undergoes a complete metamorphosis including egg, larval, pupal, and adult stages. Females lay eggs in crevices of the hive or directly on combs. Larvae emerge and tunnel through the wax, constructing silk-lined galleries. Depending on climate and ambient temperature, the moth can produce multiple generations annually, leading to rapid population explosions.

Damage and economic impact The primary damage is caused by the larvae, which consume wax and contaminate combs with silk and frass. This behavior ruins the structural integrity of the honeycomb, making it unusable for honey storage or brood rearing. Heavy infestations weaken the bee colony, causing significant loss of honey production and potentially leading to colony collapse.

Control measures Effective management relies on maintaining strong, healthy bee colonies that are capable of cleaning and defending their hives. Key cultural practices include regular hive cleaning, removal of old combs, and proper storage of supers in sealed, cool environments. Biological controls, such as Bacillus thuringiensis, or approved chemical treatments can be used during periods of storage to prevent moth development.