What's eating my arisaema flavum?

Arisaema flavum, a small yellow-spathed jack-in-the-pulpit from the Himalayas, is grown outdoors in well-drained, gritty soil. Slugs and snails are the primary pest threat to tender emerging shoots. Vine weevil grubs attack the small corm. Aphids can colonise new growth. Its compact size makes it vulnerable to complete defoliation.

Emerging shoots and leaves are eaten at or near soil level; characteristic holes and slime trails; the small plant can lose all foliage in one night Apply iron phosphate pellets as growth emerges; use a fine gravel mulch around the crown to deter slugs; hand-pick after dark in wet weather

Root and corm damage from larvae; plant wilts and fails to re-emerge; adult notching visible on leaf margins Apply Steinernema kraussei nematodes to moist soil in late summer; when grown in pots, use an imidacloprid compost drench annually

Colonies on new stems and leaves cause stunting and sticky honeydew deposits Remove by hand or apply insecticidal soap spray; avoid high-nitrogen feeds that produce lush, aphid-attractive growth