What's eating my river water crowfoot?

River Water Crowfoot is largely pest-resistant in its flowing-water habitat, but water lily aphids can colonise surface foliage and aquatic leaf beetles occasionally graze submerged stems. Cattle wading and grazing are the most damaging real-world threat, physically tearing out plants and trampling root mats.

Colonies on floating leaves cause yellowing and curling; honeydew encourages sooty mould. Submerge affected foliage briefly to dislodge colonies; introduce ladybirds and lacewings as natural predators. Avoid chemical sprays near water.

Adults and larvae chew irregular holes in submerged and emergent stems and leaf tissue. Manual removal where feasible; maintain healthy, fast-moving water flow which naturally limits beetle population build-up.

Wading animals uproot entire mats, compact banks, and destroy the root network rapidly. Fence cattle out of riparian margins; install stock-proof fencing at least 2 m from the water's edge.