Yellow thistle
is a winter annual or sometimes a biannual. The initial leaves form
in a rosette. The mature leaves contain large toothed and cut lobes.
The mature leaves are very spiny.
Yellow thistle
spreads by seeds attached to tuffs of soft white hairs which help
in the spreading of the seeds. The flowers are produced in the late
spring and seeds are produced over the summer.
Yellow thistle
is found along the East Coast form Maine to Florida. It can be found
along marshy areas west to Texas.
Integrated
Pest Management Control Recommendations:
Cultural
Practices:
Yellow thistle is usually an annual, but can be a biannual. It grows along
sandy marshy fields, shores and along the edge of wooded areas. The upright
growth habit of yellow thistle aids in its control. Regular mowing will
prevent the flower stalk from forming and seeds developing. Improving
drainage should aid in the prevention of the establishment of the plants.
Herbicide Use:
For optimum control, make your postemergent herbicide application to yellow
thistle that is young and actively growing.