Exotic Pest Reporting
Robert Vidéki, Doronicum Kft., Bugwood.org
Polygonum x bohemicum
Bohemian knotweed (Polygonum x bohemicum) is an invasive plant. It is a native of Asia and was first detected in Washington in 1986.
This common invasive knotweed is a hybrid between giant and Japanese knotweed and shares characters of both parent species. It was introduced as an ornamental in its own right but has become very widespread. This plantgrows 8 to 12 feet in shrubby clumps and spreads mostly by stem and root fragments. It is usually found in disturbed areas such as flood zones and roadsides.
12/18/2019 - State awards $3.6M for invasive species projects
10/15/2019 - Nelson to remove invasive knotweed
07/22/2019 - Groups combating the spread of knotweed
06/03/2019 - USDA Plans to Release Knotweed Biocontrol
07/18/2018 - Knotweeds: thugs of the invasive plant world
08/09/2017 - Proposed ordinance targets bamboo growth
07/26/2017 - Help rid Fort Collins of noxious weeds
09/24/2015 - War on Weeds Continues - The Chronicle: Home