Lily beetle

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Time to act
Time to act

Do not Time to act in January

Do not Time to act in February

Do Time to act in March

Do Time to act in April

Do Time to act in May

Do Time to act in June

Do Time to act in July

Do Time to act in August

Do Time to act in September

Do Time to act in October

Do Time to act in November

Do not Time to act in December

Scarlet beetles (6mm – 8mm long) with black heads eat the leaves, flowers and seedpods of lilies and other members of the lily family. Don’t mistake them for ladybirds. Between April and September the beetles lay eggs on the undersides of leaves. After a week they hatch into reddish-brown maggot-like grubs, and feed on the same parts of the plant as the parents. Possibly to deter predators or disguise themselves, the larvae cover themselves in their own wet, black excrement.



Lily leaves are shredded and may be covered in brown-black droppings.

Find it on

lilies, fritillaries and Solomon’s seal


Pick off the grubs and adults as soon as you see them. The adults will drop to the ground at the slightest touch, so spread newspaper under the plants to catch them. Be quick and crush them under foot or they’ll fly off.



At the first sign of attack, spray plants with sunflower oil. Treatment is more effective on larvae than adults.