In western United States and Canada, field bindweed is considered one of the most invasive and destructive weeds, covering, contaminating and even killing thousands of acres of crops.
A cousin of morning glory, field bindweed has deep taproots, and reproduces by rhizomes and by seed.
The plant is very difficult to eradicate. It cannot be killed by herbicides. There are some biological agents now being used in British Columbia and several states in the U.S. which show promise.
Currently, the best method to eradicate bindweed is to completely exhaust the plant by continuously removing above-ground parts of it.
To read more about field bindweed and methods of controlling it, see Field Bindweed in Desert Gardens.