Lily beetle

The lily beetle, or red lily beetle, is a leaf beetle species scientifically named *Lilioceris lilii*.

The lily beetle, or red lily beetle, is a leaf beetle species scientifically named *Lilioceris lilii*. It is an invasive pest of lilies and fritillaries, where both adults and larvae feed on leaves, stems, buds, and flowers. The species is native to Eurasia and was introduced to North America through eastern Canada in the 1940s, becoming a significant pest in gardens and ornamental plantings.

Description

*Lilioceris lilii* is a bright red leaf beetle in the family Chrysomelidae (order Coleoptera). Adult beetles and larvae are associated with lily plants and are known for rapid feeding damage.

Distribution and introduction

The lily beetle is native to Eurasia and was introduced to North America in the 1940s via imported plant material. It became established in eastern Canada before spreading into the United States. It is now considered an invasive pest in parts of North America.

Host plants and damage

The beetle primarily uses true lilies (*Lilium* spp.) and fritillaries (*Fritillaria* spp.) as host plants. Feeding by adults and larvae can remove leaves and damage stems, buds, and flowers, reducing plant vigor and flowering. Adults may feed lightly on some other plants, but reproduction generally occurs only on *Lilium* and *Fritillaria*.

Identification and names

The insect is commonly called the lily beetle, red lily beetle, scarlet lily beetle, or lily leaf beetle. These names all refer to the same species, *Lilioceris lilii*.