What's eating my zantedeschia 'picasso'?

Zantedeschia 'Picasso', known for its white-edged purple spathe, is a garden and patio calla lily. Aphids are the most consistent pest, settling on flower stems. Slugs and snails chew foliage in wet spells. Thrips distort and bleach the bicolour spathes. Deer will eat plants in open gardens if given opportunity.

Soft colonies on stems, leaf axils, and flower stalks; honeydew leads to black sooty mould. Blast off with water; apply insecticidal soap; plant near companion plants like marigolds to deter aphids.

Ragged holes in the broad leaves and gnawed emerging shoots; slime trails visible in the morning. Use iron phosphate slug bait; copper tape on pot rims; nematode soil drench (Phasmarhabditis hermaphrodita) in spring.

Silvery streaking on the purple and white spathe; heavy infestations cause flowers to fail to open properly. Remove damaged spathes; spray with spinosad or pyrethrin-based product; under glass, use Amblyseius predatory mites.