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Aquatic Insects

Size: 5–40mm

Identification, life cycle, damage signs, and treatment guide.

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Identification

Diverse group including water boatmen, pond skaters, and diving beetle larvae found in ponds and water features around aquatic plants.

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Life Cycle

Most overwinter as nymphs or adults in mud or water, breeding in warm months with aquatic larval stages.

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Damage Signs

Larvae of some species chew on submerged and floating plant tissue; large populations can shred leaves of water lilies and pondweed.

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Treatment

Remove by hand-netting during water changes. Encourage fish or amphibians as natural predators. Avoid broad-spectrum insecticides near water.

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Prevention

Maintain balanced pond ecosystems with fish and good plant cover to keep populations in check.

Aquatic Insects — Plant Pest Identification & Control | GreenScout