Red lily beetle

Found this information for you - The recommended method of removal is to check affected plants regularly picking off and crushing any adults, eggs or larvae. The adults tend to drop to the ground with their black undersides showing when the plant is disturbed so they are easier to find if a light-coloured material is placed there first. Due to the difficulty in spotting the larvae a follow-up treatment with an insecticide is advisable - one containing Imidacloprid such as Bio Provado Ultimate Bug Killer (Imidacloprid and Sunflower Oil) - As a preventative the insecticide can be applied to the soil in the spring to eliminate the overwintering adults before the lilies start into growth.