Understanding Leatherjackets and Their Effects

Crane fly larvae, or larval pests, nest in the soil and attack grassroots and decomposing plant matter. They are most active in mild weather, often resulting in loose turf and increased surface vulnerability. On sports fields, this can interrupt play and increase upkeep requirements.

Spotting the Signs Early

Feeding birds, bare turf, and asymmetrical damage often signal larval feeding. Cutting test patches allows for density checking. Consistent observation in late winter and early spring enables prompt treatment decisions.

Turf Care During Key Seasons

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 empowers grounds teams to plan maintenance that reduces seasonal stress.

Non-Chemical Management

Many turf professionals employ cultural practices. Soil aeration promotes deeper root growth and sturdier swards. Adjusting mowing height minimises turf stress. Rolling in damp conditions can disrupt them, making them easier for predatory birds to reach. These measures build resistance, though they don’t eradicate infestations.

Biological Control: Nematodes

Microscopic nematodes are a biological solution that destroy crane fly larvae underground. Their success is linked to soil temperature, moisture, and precise application—usually in early to mid-autumn. Used properly, nematodes help turf recover without chemical input.

Responsible Use of Pesticides

On frequently used surfaces like football pitches, chemical products may be warranted. Only authorised products should be used, and always according to regulation and guidance. Combining targeted chemical use with other strategies often leads to stable turf conditions.

Long-Term Larvae Management

Future-proofing turf involves managing drainage, building root systems, and ensuring adequate nutrient levels. After crane fly emergence in late summer, surveying the grounds helps forecast the next season’s risk. Proactive measures minimise larval development over time.

FAQs About Leatherjackets and Control

• When are larvae most active?
  
  Activity is most intense in moderate soil temperatures.



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



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


here
• Should I alter mowing height?
  
  Yes, longer grass during feeding seasons can offer protection.



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

Summary

Managing crane fly larvae requires vigilance, timely actions, and a balanced approach. Grounds treated with this methodology are more likely to stay usable across all seasons.

For read more support with implementation, visit ALS Contract Services.