What's eating my begonia 'picotee lace pink'?

Begonia 'Picotee Lace Pink' (tuberous type) is most threatened by vine weevil grubs that eat the tuber, causing collapse. Aphids disfigure buds and tender growth, and slugs shred delicate lace-edged petals. In open beds, rabbits may graze stems. Vine weevil larvae cause the most irreversible damage.

Plants suddenly collapse; potting mix contains white, legless grubs that have destroyed feeder roots and tubers Apply Steinernema kraussei nematodes while soil temperature is above 5 °C; inspect tubers when lifting in autumn; use neonicotinoid-free vine weevil compost treatments

Twisted or stunted shoot tips; colonies of small insects coated in waxy powder on buds Introduce parasitic wasps (Aphidius) in glasshouse settings; outdoors apply insecticidal soap weekly; remove heavily infested growing tips

Ragged holes in the delicate picotee-edged petals and lower leaves; slime trails left overnight Scatter iron phosphate pellets; use copper-tape barriers on pots; hand-pick after dark in wet weather