Ryegrass is valued at 3.3 times the second most valuable species, Pinus radiata. Epichloë fungal endophytes such as AR37 are vital for pasture persistence. Volume 67, Issue 4 (2024) of the New Zealand Journal of Agricultural Research includes a review article by John Caradus titled Epichloë fungal endophytes – a vital component for perennial ryegrass survival in New Zealand.
Caradus, J. R. (2023). Epichloë fungal endophytes – a vital component for perennial ryegrass survival in New Zealand. New Zealand Journal of Agricultural Research, 67(4), 451–468.