What's eating my graceful cattail?

Graceful Cattail (Typha laxmannii) is reported to have no serious pest or disease issues. Like other cattails it can host stem-boring moth caterpillars and occasional aphid colonies, but these rarely cause meaningful damage to established plants. Muskrats may graze rhizomes where the plant grows in natural wetland margins.

Caterpillars mine inside stems and leaves; visible as wilted, discoloured shoots with internal frass. Cut out and destroy affected stems; Bt spray on young caterpillars before they tunnel inside the stem.

Small colonies may form on stems and leaves, causing leaf discoloration and honeydew deposits. Knock off with a water jet; natural predators (ladybirds, hoverflies) typically keep populations in check without intervention.

Graze on fresh rhizomes and shoots at the waterline, which can thin or open up dense stands. Wire mesh barriers protect ornamental plantings; in natural water margins, light grazing is typically tolerated and can reduce overcrowding.