The Problem with Leatherjackets Crane fly larvae, commonly referred to as grubs, live in the upper layers of soil, where they feed on grassroots and organic material. Their presence is most problematic in spring and autumn, and their activity can lead to spongy ground and deteriorating turf condition. Sports fields https://cesaryzyvs.get-blogging.com/39262122/h1-managing-crane-fly-larvae-for-well-maintained-turf-surfaces-h1