Type: report

Article abstract: Non-native plant species are considered a threat to virtually all of the extant populations of the federally endangered Ambrosia pumila. The objective of this study was to compare the response of A. pumila among to several vegetation management techniques that included: mowing, application of Fusilade II Turf and Ornamental Herbicide (a grass-specific herbicide to remove non-native species), hand-pulling of all non-native species, and a control. This study was replicated at three different sites in San Diego and Riverside Counties (Skunk Hollow Preserve, Mission Trails Regional Park, and San Diego National Wildlife Refuge), which in turn allows us to describe management options for the full geographical range in which A. pumila occurs.