Brooms are shrubs which were originally planted in California as ornamentals and for erosion control, but are now considered to be invasive weeds since they are highly competitive. They crowd out native plants and form impenetrable barriers to wildlife. There are four common species of broom in California: Scotch broom, French broom, Spanish broom and Portuguese broom.
French broom, Genista monspessulana, invading a hillside near Bodega Bay, California. (Credit: B Rice)
In the newly revised Pest Notes: Brooms, UCCE advisor Scott Oneto and UC Davis weed scientists Joe DiTomaso and Guy Kyser explain the issues with planting these invasive species. The publication includes expanded sections on biology and management and updated herbicide information. Effective application techniques with new photographs are also in this new version.
Read more in the full Pest Notes: Brooms on the UC IPM website.