What's eating my tuberous begonia 'nonstop'?

Tuberous Begonia 'Nonstop' is highly susceptible to vine weevil larvae eating its tubers outdoors and in containers, which is the most destructive threat. Aphids and thrips attack flowers and buds. Slugs and snails shred petals and young growth, especially in damp UK conditions. Earwigs chew petals at night.

Larvae eat tubers from below, causing sudden wilting and plant collapse; adults notch leaf edges Apply nematode soil drench (Steinernema kraussei) in late summer; use neonicotinoid-free compost and inspect tubers before overwintering

Ragged holes in petals and leaves; silvery slime trails on soil and stems Apply iron phosphate pellets; use copper tape around containers; water in the morning to reduce overnight moisture

Soft colonies on buds and tender stems; flower deformation and sticky residue Squash small colonies by hand; spray with insecticidal soap solution every 5–7 days

Silver-streaked or flecked petals and leaves; dark frass spots on flowers Remove badly affected flowers; spray with spinosad or insecticidal soap; blue sticky traps help monitor