A spray bottle filled with alcohol lies near the entrance to a new plant nursery at the Point Reyes National Seashore headquarters, in Bear Valley. The spray is used to disinfect the soles of shoes and defend against phytophthora tentaculata, a deadly plant pathogen that has alarmed Bay Area nurseries over the last few years.
“There’s a fear of phytophthora tentaculata spreading,” Roxanne Foss, the range management specialist for the seashore, said at the outset…