Remove and Treat Ailanthus at Folsom Powerhouse State Historic Park

Remove and Treat Ailanthus at Folsom Powerhouse State Historic Park

Remove and treat Tree of Heaven (Ailanthus), an invasive exotic plant species, at the Folsom Powerhouse State Historic Park (SHP). Ailanthus has infested many portions of the SHP. This project will remove and treat Ailanthus throughout the park unit. Ailanthus and other vegetation has routinely been removed from the canals and forebay of the Powerhouse as part of the maintenance program for the unit. The primary treatment method will be to cut the stems and treat the cut ends with an herbicide recommended by a licensed Pest Control Advisor. Herbicides that may be used include imazapyr, glyphosate, and triclopyr. The cut vegetation will be removed and disposed of at an appropriate disposal facility. In areas that are less accessible or where Ailanthus is growing through historic structures, a basal park herbicide treatment may be used and the plants would be left to die in place. In some of the canals and forebay of the Powerhouse, ladders and ropes may be used to access the area to minimize any impacts on historic fabic. An initial treatment will occur in the fall of 2005 and a follow-up treatment will occur in the fall of 2006. No elderberry shrubs, the host plant of the federally listed valley elderberry long-horned beetle, have been observed within 100 feet of the proposed work area.

Sacramento