This invasive beetle is spreading across Michigan -- what to know, how to spot it
ClickOnDetroit | WDIV Local 4 • • science
Key Points:
- The invasive lily leaf beetle, originally from Eurasia, is spreading across Michigan and poses a significant threat to lily plants, especially those in the Lilium and Fritillaria families such as tiger lilies and Easter lilies.
- The beetle lays hundreds of eggs on the undersides of leaves, and its larvae feed aggressively on host plants, covering themselves with excrement to avoid predators, while adults overwinter in soil or leaf litter.
- Michigan State University scientists are monitoring the beetle’s spread and exploring biological control options used successfully on the East Coast, such as introducing a parasitoid insect that targets the beetle’s larvae.
- Gardeners are urged to report sightings of the beetle with photos to the Midwest Invasive Species Information Network and can manage infestations by hand-picking beetles or using specific insecticides while protecting pollinators.
- The beetle has no significant natural enemies in North America, making vigilant garden management essential to protect susceptible plants from serious damage.
