What Are Crane Fly Larvae?

Crane fly larvae, or immature crane flies, reside in the soil and attack grassroots and decomposing plant matter. They are most active in the transitional seasons, often resulting in loose turf and increased surface vulnerability. On heavily used grass areas, this can delay play and increase upkeep requirements.

Early Indications of Infestation

Feeding birds, bare turf, and irregular patches often signal larval feeding. Cutting inspection areas allows for population assessment. Regular observation in late winter and early spring facilitates prompt treatment decisions.

The Seasonal Cycle of Larval Damage

Leatherjackets remain hidden during winter but will consume roots if conditions permit. Neglected populations lead to slow turf recovery as temperatures rise. Knowing their behaviour allows grounds teams to plan maintenance that offsets seasonal stress.

Non-Chemical Management

Many turf professionals rely on cultural practices. Aerating the ground promotes deeper root growth and healthier swards. Adjusting mowing height minimises turf stress. Rolling in damp conditions can bring larvae closer to the surface, making them easier for natural predators to reach. These measures enhance tolerance, though they don’t eliminate infestations.

Nematode Use in Turf Health

Microscopic nematodes are a eco-friendly solution that infect crane fly larvae underground. Their success is linked to soil temperature, moisture, and precise application—usually in late summer. Used properly, nematodes can significantly reduce larval numbers without chemical input.

Chemical Control in Necessary Cases

On frequently used surfaces like football pitches, chemical products may be required. Only registered products should be used, and always as per regulation and guidance. Combining targeted chemical use with other strategies often leads to more sustainable turf conditions.

Steps to Minimise Risk

Future-proofing turf involves improving drainage, building root systems, and ensuring balanced nutrient levels. After crane fly emergence in late summer, scouting the grounds helps forecast the next season’s risk. Proactive measures limit outbreak scale over time.

FAQs About Leatherjackets and Control

• When are larvae most active?
  
  Activity is typically observed in autumn and spring.



• How do I check for infestation?
  
  Cut small turf squares and count larvae beneath to determine infestation levels.



• Are nematodes effective in cold soil?
  
  No, they require certain temperatures and moisture levels to work properly.



• Should I alter mowing height?
  
  Yes, longer grass during feeding seasons can support recovery.



• What causes birds to peck at turf?
  
  Birds are usually attracted to larvae near the surface. This is often an early sign of a problem.

Final Word

Managing crane fly larvae requires vigilance, planned actions, and a combined approach. Grounds treated with this discipline are more likely to perform well across all seasons.

For here support with implementation, visit crane fly larvae control ALS Contract Services.