Annual Dues 2021

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Yellow Starthistle

Yellow Starthistle

BACKGROUND: Yellow starthistle was introduced from Europe. It grows well on dry sites in rangeland, roadsides, and waste areas. It can cause “Chewing disease” in horses that consume it.

OTHER COMMON NAMES:

DESCRIPTION: Yellow starthistle is a 2 to 3 foot tall winter annual with blue-green coloration. Rosette leaves are deeply lobed and could be confused with dandelion. Stems are winged and sparsely leaved. Flowers are yellow. Cream-colored thorns, ¼ to ¾ inch long, protrude from the flowering heads. Bloom is in early summer.

CONTROL: Several biocontrol agents have been tested, but availability is limited. Select herbicides offer fair to good control when applied between rosette and bloom stages. Tillage is effective. Contact your state or county weed specialist for specific, updated information.

  • SCIENTIFIC NAME:Centaurea solstitialis
  • CLASS: 2
  • BIOCONTROL AGENTS AVAILABLE: LIMITED

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Contact us with questions

Utah Biological Control

Amber Mendenhall

phone: 435 830 4146

email: utahsbuggirl@gmail.com

Utah Noxious Weeds

contact your local County Weed Supervisor

NEW INVADERS GUIDE

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