Crane Fly Larvae and Turf DamageCrane fly larvae, commonly referred to as grubs, live in the upper layers of soil, where they feed on grassroots and plant material. Their presence is most problematic in transition months, and their activity can lead to soft ground and weakened turf condition. Sports fields may become unusable without proper control.How to Spot an InfestationIdentifying larvae before serious damage occurs is wise. Watch for signs such as bird pecking, patchy grass, and irregular surface wear. Cut test squares in the turf to observe larvae beneath. Conducting these checks during early spring supports better planning.Seasonal Risks to Grass ConditionLeatherjackets can continue feeding underground during milder winter spells. If they are not kept in check, the turf’s ability to recover in spring is hindered. Maintenance scheduling based on known behaviour helps reduce pressure on affected areas.Tackling the Problem Without ChemicalsMaintenance teams often begin with physical practices. Regular aeration strengthens root growth and improves turf firmness. Raising mowing height during feeding periods can improve resilience, and rolling moist turf may lift larvae, leaving them open to natural predation. These methods help bolster turf quality, even if they do not eradicate the pests.Natural SolutionsNematodes, microscopic bioagents, offer a natural way to address larvae. They are most effective when applied during early autumn, under appropriate moisture and temperature conditions. When timed and applied correctly, they reduce larval numbers and allow the turf to regrow.Supplementing with Registered ProductsIn some cases—especially on high-demand surfaces—chemical treatment may be necessary. Authorised turf protection products may be applied, but only according to current regulations. Blending chemical input with cultural and biological steps prevents overuse.Reducing Future RiskTo avoid outbreaks in future seasons, aim to optimise drainage, support strong rooting, and maintain balanced nutrient levels. Monitoring turf after crane fly emergence in late summer indicates larval activity levels for the months ahead.Frequently Asked Questions When do leatherjackets feed the most? They tend to be present in greater numbers during mild periods in autumn and spring. How can I be sure I have a problem? Cut out a small patch of turf and count the number of larvae beneath. This provides a direct population check. Can nematodes survive in cold soil? No. They require specific temperatures and soil moisture to be effective. here Does mowing height matter? Yes. Leaving grass slightly longer during larval feeding helps support plant health. get more infocrane fly larvae control Why are birds damaging my lawn? Birds often scratch where larvae are present. Their behaviour can be an early indicator of infestation.Final AdviceManaging crane fly larvae involves a mix of early detection, well-timed treatment, and varied management strategies. By coordinating physical methods, biological control, and limited chemical use, turf conditions can be maintained throughout the year.Need professional help? Visit ALS Contract Services for more information.