UC IPM Online UC ANR home page UC IPM home page

UC IPM Home

SKIP navigation

 

Tomato

Special Weeds—Preplanting

On this page
  • Dodder
  • Field bindweed
  • Nutsedges
  • Black nightshade
  • Hairy nightshade

Special management practices may be required when planting tomatoes in fields that are severely infested with hard-to-control weeds such as nightshades, little mallow (cheeseweed), field bindweed, nutsedge and parasitic dodder. For information on management see Special Weeds of Tomato. Names link to more information on identification and biology.

Click on photos to enlarge

Dodder seedling
Dodder
(Cuscuta spp.): Morningglory family; summer annual; leafless or with small scalelike triangular leaves about 1/16-inch in length; stems slender, twining or threadlike; vary in color from pale green to yellow or bright orange.


Field bindweed
(Convolvulus arvensis): Morningglory family; perennial; seed leaves nearly square, with shallow notch at tip; early true leaves spade-shaped; petioles flattened.

Young yellow 
				nutsedge plant.
Nutsedges
(Cyperus spp.): Sedge family; perennial; first leaves inconspicuous and grasslike; grow mainly from tubers or "nutlets" formed on rhizomes, mostly in upper foot of soil; in cross section, leaves V-shaped, arranged in sets of three at base, and stems triangular.
Nightshades
Black 
				nightshade seedling.
Black nightshade
(Solanum nigrum): Nightshade family; summer annual; seed leaves oval and pointed; first true leaves spade shaped with smooth edges; lower surfaces often purple; petioles stems and leaves with some hairs.
Hairy 
				nightshade seedling.
Hairy nightshade
(Solanum sarrachoides): Nightshade family; summer annual; seed leaves narrow, small, and lanced shaped with very short soft hairs along edges; first true leaves with wavy edges and prominent veins.

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2014 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.

Agriculture and Natural Resources, University of California

Accessibility   /PMG/C783/m783epweeds.html revised: May 19, 2014. Contact webmaster.