Liriope Anthracnose: Red-Brown Spots Mean Fungal Disease

Reddish-brown spots on liriope (monkey grass) indicate anthracnose (Colletotrichum spp.). Manage it with sanitation and fungicide.

Treatment Plan

1. Mow or cut back all infected foliage in late winter (before new growth).
2. Remove and dispose of clippings.
3. Spray new growth with chlorothalonil (Daconil) every 2–3 weeks in spring.
4. Improve air circulation; avoid overhead watering.

New leaves should emerge clean if treated promptly.

Anthracnose spots on liriope leaves.

Mowed liriope ready for fungicide treatment.

Healthy new growth after treatment.