What Are Crane Fly Larvae? Crane fly larvae, or leatherjackets, reside in the soil and feed on grassroots and decomposing plant matter. Activity peaks in mild weather, often resulting in thinning turf and increased surface vulnerability. On heavily used grass areas, this can interfere with play and increase upkeep requirements. https://hollowtininggreens45566.blogocial.com/h1-proactive-methods-for-controlling-crane-fly-larvae-and-preserving-turf-health-h1-74631889