Abstract
AbstractPythium root rot (PRR), caused by various Pythium species, is a major disease of creeping bentgrass in the transition zone of the United States. Characterization of various Pythium species associated with PRR was determined by identifying 106 Pythium isolates from samples of symptomatic turfgrass cores. Pathogenicity assays were conducted on post‐emergent (7‐day old) seedlings and mature (5‐week old) creeping bentgrass plants that were inoculated with four different Pythium spp. and incubated at 34 ℃/28 ℃ for 1 to 5 weeks. The results demonstrated that pathogenicity on post‐emergent seedlings may not correlate with pathogenicity on mature plants. The sensitivity of various Pythium spp. to ten commercially available fungicides was determined through in vitro mycelial growth assays. Isolates (n = 20) varied in sensitivity to fungicides across and within species of Pythium. Management of PRR was determined through field experiments, revealing that cyazofamid‐based treatments were most effective when applied preventatively in the early summer, and were able to reduce disease severity when applied curatively.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call