Hidden garden pest could be reason behind brown lawn patches

Leatherjackets, the larvae of crane flies, are a destructive garden pest that feed on grass roots, causing yellow and brown patches. Early detection through visual cues and a simple grub test is crucial for effective treatment. The recommended chemical-free solution involves using pathogenic nematodes, which are safe for children, pets, and wildlife, but require specific soil conditions and timely application.

• Leatherjackets, the larvae of crane flies (daddy long legs), feed on grass roots, causing lawn damage.
• Symptoms include discoloured yellow or brown grass and uneven patches that don’t recover.
• A grub test involving soaking the lawn and covering it with dark material can reveal leatherjackets.
• Birds and badgers digging in lawns can also indicate the presence of leatherjackets.
• Biological control using pathogenic nematodes is a chemical-free treatment option.
• Nematodes infect leatherjackets with a bacterial disease, stopping them from feeding.
• Nematodes are safe for children, pets, wildlife, and the garden ecosystem.
• Effective nematode application requires well-drained, moist soil at a minimum temperature of 12°C.
• Applying nematodes in September and early October is recommended as a preventative measure.
• Prevention is more effective than repairing damaged turf later in the season.
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