Biennial & Perennial Weeds
HOUNDSTONGUE Cynoglossum officinale Life Cycle: Biennial Plant Description:
The rosette leaves resemble a houndstongue and emerge from a
thick, dark, woody taproot. Flowers are reddish-purple and form on stalks that can be up to 4 feet tall. Seed spreads long distance by attaching to the hide of grazing animals and wildlife. Treatment: Apply Chaparral ™ herbicide to rosettes in
spring, increasing the application rate to 3.3 ounces per acre at bolting to early- bud growth stage. Tank mix 1 quart of 2,4-D amine to Chaparral herbicide at 3.3 oz/A after the bud stage, to reduce flowering and seed production.
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