Daylily rust is a fungal disease caused by Puccinia hemerocallidis with symptoms including yellow and white spots on the upper surface of the leaves, yellow or orange spores, and rusty colored pustules on the underside of the leaves.
Signs of damage:
Raised yellowish-orange, powdery pustules on the surface of infected foliage. Significant foliar dieback occurs on especially susceptible cultivars.
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