Biology and Management of the Toadflaxes - 3. 114 - Extension Yellow toadflax was mowed three times per year then treated with Tordon at 4 pt A in fall for two consecutive years and compared to Tordon applied at 4 pt A at flowering also for two consecutive years Yellow toadflax control was the same (85 percent) whether Tordon treatments were combined with mowing or not Biological Control of Toadflaxes
Yellow Toadflax – Adams County Extension - Colorado State University Yellow Toadflax (Linaria vulgaris Mill ) Identification Yellow toadflax is a perennial with stems that grow from one to three feet tall The pale green leaves are narrow, linear, and pointed at both ends Flowers are bright-yellow with an orange center, with a spur that is approximately as long as the rest of the flower combined
Biology and Management of the Toadflaxes Broad-leaved Dalmatian toadflax (L dalmatica) has been cultivated as an ornamental for at least 400 years It was introduced into the western U S as an ornamental in 1874 The majority of Dalmatian toadflax infestations in the west are broad-leaved Dalmatian toadflax; however in its native Eurasian habitat, narrow-leaved Dalmatian toadflax (L
Dalmatian Toadflax – Adams County Extension - Colorado State University Dalmatian toadflax is a perennial forb introduced from Europe as an ornamental plant for use in gardens It has escaped the garden and is now rapidly invading dry rangeland from 5,000 to 8,000 feet in elevation Dalmatian toadflax spreads by rhizomes and it should be immediately controlled if encountered
Yellow Toadflax – Gilpin County Extension - Colorado State University Yellow toadflax (Linaria vulgaris) State law: Toadflax must be eradicated or contained in Gilpin County Caution: there is a native plant, Golden Banner (Thermopsis divaricarpa) which people sometimes confuse with toadflax If you look at the leaves, it is impossible to mistake them The leaves of yellow toadflax are linear
Weeds – Extension NRCS – Small Acreage Management Facts About Dalmation Toadflax – spring 2013; Palisade Insectary offers Biocontrol Options – summer 2012; Weeds Are Impacting Our Landscape – winter 2012; Facts About Purple Loosestrife – summer 2011; Facts About Diffuse Knapweed – spring 2011; Early Weed Detection for Better Management – winter 2011; Facts About Scotch Thistle
Weed Law Responsibilities for Landowners and Managers Toadflax(es)–residual herbicides, sulfonylurea herbicides Bio-controls are available Knapweed(s)-a combination of contact and residual herbicides, continuous mowing, grazing by sheep, continuous cultivation Aminopyralid herbicide is especially effective Some bio-controls are available
Weed Law Responsibilities – Routt County Extension Toadflax(es)–residual herbicides, sulfonylurea herbicides Bio-controls are available Knapweed(s)-a combination of contact and residual herbicides, continuous mowing, grazing by sheep, continuous cultivation Aminopyralid herbicide is especially effective Some bio-controls are available
Wanted: Runaway Invasives – Arapahoe County Extension Yellow toadflax has flowers that look similar to snapdragons It was originally used for medicinal purposes and for yellow dye It can be found along roadsides, abandoned lots and areas with gravel With roots that can be 3 feet deep and extend several yards, it is difficult to eradicate Dalmatian Toadflax, Photo: ssisc ca
Leafy Spurge - Extension toadflax), particularly when plants are in a vegetative growth stage Leafy spurge has an extensive root system that is abundant in the top foot of soil, and it may grow 15 feet deep or more Roots contain substantial nutrient reserves that allow the weed to recover from stress, including control efforts Many vegetative