Crane Fly Larvae and Turf Damage Crane fly larvae, commonly referred to as leatherjackets, dwell in the upper layers of soil, where they feed on grassroots and decaying material. Their presence is most noticeable in spring and autumn, and their activity can lead to soft ground and poor turf condition. https://grounds-maintenance-for-s32963.amoblog.com/h1-managing-crane-fly-larvae-for-well-maintained-turf-surfaces-h1-60558656