UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

SKIP navigation

 

Dry Beans

Winter Annual Weed Seedlings

On this page
  • Mustards
  • Common sowthistle
  • Prickly lettuce
  • Prairie cupgrass

Use the photos below to identify weeds in the field. Names link to more on identification and biology.

Click on photos to enlarge
Mustard 
				seedling.
Mustards
(Brassica spp.): Mustard family; winter annual; all mustard seedlings with broad seed leaves and deep notch at tip; first true leaves bright green on the upper surface and paler below.
Annual sowthistle 
				seedling.
Common sowthistle
(Sonchus oleraceus): Sunflower family; summer annual; seed leaves markedly stalked, almost spoon-shaped, rounded at tip and often have grayish powdery bloom.
Seedling of 
				prickly lettuce, Lactuca serriola.
Prickly lettuce
(Lactuca serriola): Sunflower family; summer or winter annual or biennial; seed leaves about 2 times longer than wide; first true leaves with rounded margins; injured tissue bleeds milky white latex.
Prairie cupgrass
Prairie cupgrass
(Erichloa contracta): Grass family; winter annual; light green seedlings as distinguished from southwestern cupgrass, with short, soft hairs on leaf blade and sheath; hairlike ligule less prominent than in southwestern cupgrass.

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2008 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance. /PMG/C052/m052wpwinterweeds.html revised: December 19, 2008. Contact webmaster.