Description of Thistle, Woolly Distaff (Carthamus lanatus):
Woolly distaff thistle, unlike most thistles, have yellow flowers instead of purple. It has become increasingly invasive in southern Oregon and northern California. They're so dense that they are crowding out grasses and native species to the areas.
CertainLabel™
Woolly Distaff Thistle Optimized Control Options Finder
Legend:
Control
Suppression
No Control
According to the manufacturer approved labels: The following weed killer, applied at the listed application rates, will control Woolly Distaff Thistle.
Blanket Treatment
per
Label Rate:
0.09 - 0.16 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 199131 - 348480 square feet
at a cost of
$0.27 - $0.48 per 1,000 sqft
at a cost of
$0.27 - $0.48 per 1,000 sqft
Safe On
No safe on treatments listed. Please, review the label or contact the merchant for more information.