Pest identification
What's eating my purple moor grass?
Rust (Puccinia spp.)
Signs: Bright orange or brown powdery pustules on leaf blades, especially in warm humid weather; heavy infection causes yellowing and dieback.
Control: Improve air circulation by thinning clumps; cut back hard in late winter to remove infected tissue. Avoid overhead watering. Fungicide sprays (myclobutanil or sulfur) for severe outbreaks.
Aphids
Signs: Soft-bodied insects cluster at shoot bases or on new growth, causing distorted or sticky foliage with honeydew.
Control: Blast off with a strong jet of water; introduce or encourage ladybugs and lacewings. Insecticidal soap spray for persistent colonies.
Slugs and Snails
Signs: Irregular ragged notches along young blade edges and silvery slime trails, mostly on new spring growth at soil level.
Control: Apply iron phosphate slug pellets around the clump base in spring; clear debris where slugs shelter. Beer traps reduce local populations.
Keep purple moor grass pest-free
Healthy plants resist pests best. Get the basics right:
Purple Moor Grass pests — FAQ
What is eating my purple moor grass?
Purple Moor Grass is exceptionally pest-resistant. Orange rust pustules on blades are the most likely problem, especially in humid summers. Aphids occasionally cluster on fresh shoots, and slugs can nibble young emerging foliage in spring. Deer and rabbits rarely browse it. Overall, it is one of the least troubled ornamental grasses you can grow.
How do I get rid of rust (puccinia spp.) on purple moor grass?
Bright orange or brown powdery pustules on leaf blades, especially in warm humid weather; heavy infection causes yellowing and dieback. Improve air circulation by thinning clumps; cut back hard in late winter to remove infected tissue. Avoid overhead watering. Fungicide sprays (myclobutanil or sulfur) for severe outbreaks.
How do I get rid of aphids on purple moor grass?
Soft-bodied insects cluster at shoot bases or on new growth, causing distorted or sticky foliage with honeydew. Blast off with a strong jet of water; introduce or encourage ladybugs and lacewings. Insecticidal soap spray for persistent colonies.
How do I get rid of slugs and snails on purple moor grass?
Irregular ragged notches along young blade edges and silvery slime trails, mostly on new spring growth at soil level. Apply iron phosphate slug pellets around the clump base in spring; clear debris where slugs shelter. Beer traps reduce local populations.