How does the diet of the adult Christmas beetle differ from its larval stage?
Answer
Adults shift their focus entirely to chewing foliage (leaves).
There is a complete dietary transition between the life stages of the Christmas beetle. While the larvae are underground root feeders, consuming fine plant roots, the adults undergo a complete shift in focus once they emerge. The winged adults direct their feeding activity toward above-ground plant material, specifically chewing on the foliage, most commonly those belonging to eucalypts. This results in two distinct types of damage: the subterranean root severing by the grub and the aesthetic defoliation caused by the adults chewing leaves.

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