Approximately how long can the *Galleria mellonella* caterpillar grow before pupation?
Answer
Up to 30 mm long
The size attained by the larval stage of the Greater Wax Moth is a significant factor in assessing the maturity and potential severity of an infestation within a beehive. These caterpillars are known to reach a substantial length before they undergo pupation. The standard reported maximum length for these destructive larvae is up to 30 millimeters. This size provides a practical visual benchmark for beekeepers; for instance, this length is comparable to the thickness of a standard wooden frame, offering an immediate, real-world context for the infestation level being inspected.

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