Bee moth

The bee moth (Aphomia sociella) is a species of moth belonging to the order Lepidoptera and the family Pyralidae. While it is commonly known as the bee moth, it specifically targets the nests of bumblebees and social wasps, making it a significant concern for apiculturists and ecological gardeners who rely on pollinators.

This pest does not attack crops directly; instead, it targets the beneficial insects necessary for crop production. By invading bumblebee nests, the larvae consume wax, stored pollen, and the developing brood of the bees. If left unchecked, a severe infestation can result in the complete destruction of the bumblebee colony, significantly impacting the local ecosystem.

The lifecycle begins when the female moth lays eggs near or inside a bumblebee nest. Upon hatching, the larvae create elaborate silken galleries or tunnels throughout the nest. These tunnels are reinforced with silk, which protects the larvae as they feed on the nest's contents. Once fully grown, the larvae pupate within tough, brownish cocoons buried inside the debris of the nest.

Infestation is usually identified by the presence of dense, sticky silk webbing covering the nest entrance and interior cells. Furthermore, the accumulation of larval excrement (frass) within the silk tunnels is a hallmark sign of activity. Adult moths are medium-sized with a wingspan of up to 40 mm, exhibiting mottled brown and beige wing patterns for effective camouflage.

Effective control measures focus on preventative exclusion and monitoring. For managed bumblebee populations, it is vital to install fine-mesh guards over entrance holes to prevent adult moths from entering the hive. Regular inspections of hive boxes for webbed debris are essential; if an infestation is detected early, mechanical removal of the affected nest material can save the colony.