Diseases
Lolium perenne L.
A complex of fungal diseases of perennial ryegrass, including blast, helminthosporiosis, and leaf spot, causing necrosis and death of the leaf blade.
In the reference 181 varieties crop Perennial ryegrass, where this is mentioned in the description.
The primary pathogens are fungi Pyricularia oryzae, species of the genera Drechslera and Pyrenophora, as well as Scolecotrichum graminis. Blast is characterized by the appearance of small, water-soaked, olive-green spots followed by the development of grey sporulation, while infections by Drechslera and Pyrenophora appear as oval necrotic lesions with a dark margin, leading to thinning of the stand.
Populations of Pyricularia oryzae infecting ryegrass are genetically specialized for Lolium and Festuca species. Resistance of varieties to these pathogens is quantitative and polygenic in nature with no specific genes identified; therefore, breeding and agronomy prioritize tolerance assessment under artificial inoculation conditions and the use of multi-variety grass mixtures.
General information about the subject — on the page Leaf spot diseases.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Lolium perenne L. · Perennial ryegrass
DLF USA, Inc. and Rutgers, The State University of New Jersey
Lolium perenne L. · Perennial ryegrass
SEED RESEARCH OF OREGON
Lolium perenne L. · Perennial ryegrass
PICKSEED WEST INC
Lolium perenne L. · Perennial ryegrass
RAGT 2n, FR
Lolium perenne L. · Perennial ryegrass
Norfarm Seeds Inc.
Lolium perenne L. · Perennial ryegrass
Barenbrug USA
Lolium perenne L. · Perennial ryegrass
JACKLIN SEED
Lolium perenne L. · Perennial ryegrass
PROSEEDS MARKETING
Lolium perenne L. · Perennial ryegrass
PROSEEDS MARKETING
Lolium perenne L. · Perennial ryegrass
Lolium perenne L. · Perennial ryegrass
Semences De France (FR)
Lolium perenne L. · Perennial ryegrass
RUTGERS UNIVERSITY OF NEW JERSEY
Lolium perenne L. · Perennial ryegrass
VIRGINIA LEHMAN/LOFT'S
Lolium perenne L. · Perennial ryegrass
L. DÆHNFELDT A/S
Lolium perenne L. · Perennial ryegrass
PURE SEED TESTING
Lolium perenne L. · Perennial ryegrass
DLF SEEDS A/S
Lolium perenne L. · Perennial ryegrass
AGRIBIOTECH INC.
Lolium perenne L. · Perennial ryegrass
THE SCOTT & SONS COMPANY
Lolium perenne L. · Perennial ryegrass
Peak Plant Genetics
Lolium perenne L. · Perennial ryegrass
SE.FO.BI. SRL
Lolium perenne L. · Perennial ryegrass
Seed Research of Oregon & Rutgers, The State University of New Jersey
Lolium perenne L. · Perennial ryegrass
NexGen Plant Science center LLC
Lolium perenne L. · Perennial ryegrass
JACKLIN SEED
Lolium perenne L. · Perennial ryegrass
DEUTSCHE SAAT| Deutsche Saatveredelung AG