Pyricularia grisea Causing Gray Leaf Spot of Perennial Ryegrass Turf: Population Structure and Host Specificity

A Genetic Roadmap for Breeding Perennial Ryegrass Resistant to Gray Leaf Spot

A Rapid PCR-Based Method for the Detection of Magnaporthe oryzae from Infected Perennial Ryegrass

The fungus Magnaporthe oryzae Couch (anamorph = Pyricularia oryzae Cavara) (previously known as Magnaporthe grisea (Herbert) Barr) (4) causes gray leaf spot disease of perennial ryegrass (Lolium perenne L.) (12). In recent years, this disease has become a serious but sporadic problem for turfgrass managers in the mid-Atlantic and midwestern United States (9,12,16, 20,22). The disease can cause ...

Expression Analysis of Rice Defense-Related Genes in Turfgrass in Response to Magnaporthe grisea.

ABSTRACT Magnaporthe grisea (anamorph = Pyricularia grisea) causes blast on rice (Oryza sativa) and gray leaf spot on turfgrass. Gray leaf spot is a serious disease on St. Augustinegrass (Stenotaphrum secundatum), perennial ryegrass (Lolium perenne), and tall fescue (Festuca arundinacea). Virulence assays performed in this study revealed that M. grisea collected from rice could also cause disea...

Demonstration of pathotype specificity in stem rust of perennial ryegrass.

Rust diseases cause significant damage in forage and seed crops of perennial ryegrass (Lolium perenne), which is highly heterozygous and heterogeneous and thus presents difficulty in genetic analysis. There has been no definitive demonstration of the existence of pathotypes for stem rust or other rusts of perennial ryegrass, although experiments with crown rust (Puccinia coronata) of this host ...

Simulating perennial ryegrass cutting

Perennial ryegrass is one of the most commonly cultivated forage species in Europe, where grazing and mowing (cutting) are used to manage this resource. Cutting can be characterized by its intensity (height) and its frequency. Combinations of these two factors affect mono-species grasslands productivity and could also modify the genotypic composition of heterogeneous populations. Indeed, the hi...