What's eating my karl foerster feather reed grass?

Karl Foerster feather reed grass is among the most pest-resistant ornamental grasses available. Rust fungus is the most relevant issue, appearing as orange-brown pustules in wet conditions. Aphids occasionally visit new growth. Deer and rabbits rarely browse this tough upright grass.

Orange, brown, or reddish-purple powdery pustules on leaf blades and sheaths, particularly during extended wet or humid periods; can weaken foliage Remove and dispose of affected leaves; avoid overhead watering; ensure good plant spacing for airflow; apply a systemic or copper-based fungicide at first sign if conditions favor spread

Small clusters of sap-sucking insects on new spring shoots; sticky honeydew residue and mild leaf distortion; rarely severe on established clumps Dislodge with a strong jet of water; spray with insecticidal soap or neem oil; natural predators such as ladybugs and parasitic wasps generally keep populations low

Ragged chewing damage on leaf blades during summer in areas prone to grasshopper outbreaks; established plants tolerate moderate feeding well Hand-pick where feasible; use row covers on vulnerable young plants; apply a pyrethrin-based insecticide in severe outbreaks; tolerate minor damage on mature plants