students walk on University of Idaho campus

Visit UI

Learn about the many reasons the University of Idaho could be a perfect fit for you. Schedule Your Visit

Parents on campus during orientation

Homecoming Oct. 1-7

Join other Vandal families for a week of celebration and Vandal traditions. View Calendar

campus full of students

UI Retirees Association

UIRA has a membership of nearly 500 from every part of the University. Learn More

Asparagus Beetles

Order: Coleoptera
Family: Chrysomelidae
Species:
Common asparagus beetle (Crioceris asparagi)
Spotted asparagus beetle (Crioceris duodecimpunctata)

Pests as larva and adults

Appearance

  • 1/4-inch long
  • Common asparagus beetle: shiny metallic blue-black with yellow and red spots
  • Spotted asparagus beetle: reddish-orange with 6 spots per wing cover
  • Larvae: olive-gray, hump-backed sluggish grubs

Host plants

  • Asparagus

Symptoms

  • Chewing on growing tips and ferns
  • Brown-black excrement stains and feeding scars on spears
  • Brown bullet-shaped eggs on spears

Biology

  • Overwinter as adults
  • 2-3 generations per year

Control Measures

Physical

  • Hand pick and crush

Cultural

  • Harvest spears ASAP
  • Destroy overwinter plant debris and traps

Biocontrol

  • Parasitic wasp

Pesticides

Contact Us

IPM Center

Mailing Address:

University of Idaho, Boise Center
322 E Front St, Suite 180
Boise, ID 83702

Phone: 208-364-4046

Fax: 208-364-4035

Email: rhirnyck@uidaho.edu