- Turfgrass infected with nonpathogenic fungal endophytes may meet demands for reduced pesticide use and for lower inputs for maintenance of turf and production of sod. Discovery of the symbiotic relationship between these fungi and turfgrasses occurred when cattle grazing on infected grass developed symptoms such as delirium and livestock staggers. At the same time, infection with endophytic ...www.uri.edu/ce/factsheets/sheets/endophyte.html