Wax Moths

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Wax Moths

Wax moths are not much of a problem for strong colonies that can defend themselves and rid their hives of invaders, but they can easily destroy weak colonies or unprotected combs.

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Wax Moths (Runtime 1:00)

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Life Cycle and Damage

Adult moths lay eggs in hive cracks and crevices. The young larvae hatch and begin to feed on drawn comb. If left unchecked, they eat through wax—feeding on cocoons, cast skins, and pollen, and spinning silky tunnels as they go. They can make the combs a disgusting mass of webs and debris. In addition to this, these pests chew the wood of the frames to spin their cocoons in indentations, weakening the frames to a point at which they can easily break.

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Diagnosis

Silk and cocoons in a hive or on a comb signal wax moth infestation:

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Wax moths construct silken galleries on combs: PennStateExtension+OLC-1006+2017+type@asset+block/S7waxmoth3.jpg" alt="Black debris with a few worms and moths amongst silken cocoon material" style="box-sizing: border-box; border: 0px; vertical-align: middle; max-width: 100%; line-height: 1.4em; height: auto;">

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Treatment

Mothballs or crystals containing naphthalene must not be used to control wax moths!

The best defense against wax moth is to keep colonies strong. Adults, larvae, and eggs are killed by freezing temperatures. In summer and fall, supers and drawn comb not in use can be stored in a cold room or freezer. If this is not possible, storing drawn comb exposed to light 24 hours a day is a reasonable alternative.

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