Contra Costa County Department of Agriculture's Weed Management Area group has started to put together a report for weed control in tthe county.
2009 Weed Management Area annual report
(PDF 2.5 MB)
Details on some of the invasive noxious weeds that Contra Costa County Department of Agriculture is looking for that has been found in our county.
Parasitic plant that can attach itself to most any plant and eventualy kill its host. It had been found mostly in the Richmond and San Pablo areas, and a couple places in Antioch.
An introduced species found along the banks of rivers and streams. Fast spreading and it will croud out native plants.
Found in riparian areas, along streams and in marshes. Fast to spread and it will croud out natives, parts of this plant are poisonous.