Shore fly
adults feed on algae and their larvae on algae and decaying organic matter on planting substrate. Growers consider shore flies to be mostly a nuisance pest [...] fliers and can move throughout a greenhouse readily, they generally remain close to breeding sites. They breed in algae growing on soil, pots, benches, and other [...] shore fly feed primarily on microscopic algae, bacteria and other unicellular organisms, they do not cause any direct damage to plant production. However