Liliaceae are subject to a wide variety of diseases and pests, including insects, such as thrips, aphids, beetles and flies.
Both Lilium and Tulipa are susceptible to a group of five viruses of the Potyviridae family, specifically the potyvirus (named for Potato virus Y) group, which includes the Tulip-breaking Virus TBV and the Lily streak virus (Lily mottle virus, LMoV) resulting in 'breaking' of the color of the flowers.