Pest identification
What's eating my idaho fescue?
Aphids
Signs: Soft insects clustered on tender spring growth; honeydew causes sooty mould.
Control: Knock off with water; use insecticidal soap for persistent infestations.
Slugs & snails
Signs: Chewed or shredded leaf bases on young plants, worst in damp cool weather.
Control: Iron phosphate bait; hand-pick at night; clear mulch from crown.
Rust fungus
Signs: Orange to rusty-brown powdery pustules on leaf blades, weakening foliage.
Control: Cut back affected clumps in autumn; thin for airflow; avoid overhead irrigation.
Keep idaho fescue pest-free
Healthy plants resist pests best. Get the basics right:
Idaho fescue pests — FAQ
What is eating my idaho fescue?
Idaho fescue is a tough native bunchgrass with few serious pest problems. Aphids may visit in spring, and slugs can damage young shoots. In wet seasons rust fungus appears on blades. Deer and rabbits occasionally nibble seedlings but largely leave mature clumps alone.
How do I get rid of aphids on idaho fescue?
Soft insects clustered on tender spring growth; honeydew causes sooty mould. Knock off with water; use insecticidal soap for persistent infestations.
How do I get rid of slugs & snails on idaho fescue?
Chewed or shredded leaf bases on young plants, worst in damp cool weather. Iron phosphate bait; hand-pick at night; clear mulch from crown.
How do I get rid of rust fungus on idaho fescue?
Orange to rusty-brown powdery pustules on leaf blades, weakening foliage. Cut back affected clumps in autumn; thin for airflow; avoid overhead irrigation.