The Steele/Burnand Anza-Borrego Desert Research Center (SBABDRC) has taken on maintenance of the web site for the Sahara Mustard Weed Eradication Task Force. You can find the web site and updates here:
https://anzaborrego.ucnrs.org/sahara-mustard-and-volutaria-weed-task-force-welcome/
It’s a lot easier to get the Sahara Mustard plant in it’s early stages like shown above