Behavior
Like most bibionid larvae, they grow up in grassy areas and are herbivores and scavengers feeding on dead vegetation or living plant roots. "Bibio marci" larvae are known to be root damage pests of celery, asparagus, roses, saxifrages, lawn grass, lettuce and "Polyanthus". They also feed on a very large number of plant species that are commercially unimportant.References:
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