Field bindweed (Convolvulus arvensis) is a long-lived perennial with twining stems 1 to 6 feet long or more. The leaves are 1 to 2 inches long, smooth and shaped like an arrowhead. Flowers are funnel-shaped, 1 inch in diameter, white or pink.
This drought tolerant plant is originally from Eurasia and found as high as 10,000 feet.
Biology and spread
The average plant produces about 550 seeds; seeds can remain dormant in soil for up to 60 years. The root systems spread 20 to 30 feet laterally.
Colorado Noxious List C. The extensive root system makes it difficult to control and its twining growth habit causes it to climb fences, buildings, and desirable plants. Field bindweed is highly competitive, especially for soil moisture.
Cultural, physical and mechanical control: Use intense cultivation to control new infestations when they are small. Hand-weeding or hoeing is usually not effective due to its extensive root system. Purchase and plant clean seed and ornamental stock. In turfgrass, mow frequently and introduce new turf seed in fall or spring (every two to three years) to promote intense competition. Maintain a healthy cover of perennial plants to discourage establishment. Multiple treatments will be needed over multiple seasons.
Chemical control: Drive can be used post-emergence in residential and nonresidential turf or Paramount can be used around parking lots or roads.