Epidemic spread of Puccinia hemerocallidis in Brazil

Abstract

Since the first report of daylily rust (Puccinia hemerocallidis) in Brazil in the state of São Paulo in 2001, it spread during that decade and is now found in a very broad area encompassing central, northeastern, southern and southeastern Brazil. It is now regarded as one of the major disease problem for this popular ornamental. Events in Brazil were equivalent to those of the epidemic spread of P. hemerocallidis in the US which occurred around the same period.

Pathological and Epidemiological Characterization of First Outbreak of Daylily Rust in Europe and Evaluation of Puccinia hemerocallidis Resistance in Hemerocallis Cultivars

“…The dimensions recorded for the nonseptate and 1-septate teliospores of the Ph02 isolate in accordance with the description made by Thümen [8], Hernández et al [18], Inokuti et al [35] and Silva et al [15]. However, the teliospores of isolate Ph14 had a smaller average size than teliospores found in other geographic regions.…”

“…However, the teliospores of isolate Ph14 had a smaller average size than teliospores found in other geographic regions. The minimum and maximum pedicel length recorded for the two isolates approximate the measurements made by Inokuti et al [35] and von Thümen [8]. Most teliospores were single celled, similarly to the report by Hernandez et al [18] for pathogens occurring in North America, contrasting with Asian specimens [18] but also with reports from South America [35,36] where only septate teliospores were found.…”