Marchese CL
ActiveOryza sativa L. · Rice
SA.PI.SE SARDO PIEMONTESE SEMENTI
IT
3 records
Diseases
Rice blast
Pyricularia oryzae
Rice blast is a dangerous fungal disease of rice that affects all above-ground plant organs and can destroy up to 100% of the crop. The disease manifests in leaf, node, and panicle forms, causing necrosis and tissue death.
Mentioned in descriptions 470 varieties reference book.
Rice blast affects all above-ground organs of rice, including leaves, nodes, stems, and panicles, manifesting as characteristic grayish-green spots that eventually become silvery-white with a dark border. In the nodal form of the infection, stems turn black, while the panicle form results in spikelet sterility and the formation of shriveled grain, leading to critical crop losses during epiphytotic periods.
The development of the pathogen depends directly on environmental conditions, requiring temperatures in the range of 26–28 °C and high relative humidity above 89% for active spread, provided there is prolonged moisture on the leaf surface. The infection persists in plant debris and seeds, becoming active when favorable climatic factors occur.
Cultivar resistance is provided by specific R-genes that trigger plant defense responses through local tissue necrotization around the infection site. Breeding is focused on pyramiding multiple resistance genes; however, the effectiveness of protection may decrease due to the high adaptive variability of the fungus and the emergence of new virulent races in cultivation regions.
The evaluation of cultivar resistance in variety trials is conducted comprehensively using artificial infection backgrounds, molecular genetic markers for R-gene identification, and international disease severity scales. Environmental testing is of great importance, as it allows for the assessment of genotype reaction stability in various agrolandscape zones.
Breakdown by crop
Found in these crops
Varieties that feature this in their description
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Lomello
ActiveOryza sativa L. · Rice
CREA-Centro di Ricerca per la Cerealicoltura( CREA-CI-VC)
IT
3 records
Kiziltan
ActiveOryza sativa L. · Rice
Trakiy Agricultural Research Institute (TR)
BG
3 records
Jsendra
ActiveOryza sativa L. · Rice
IVIA
ES
4 records
Hidalgo
ActiveOryza sativa L. · Rice
Texas Agricultural Experiment Station/ USDA-ARS
ES
4 records
Fonsa
ActiveOryza sativa L. · Rice
Semillas Certificadas Castells S.L.
ES
5 records
Gines
TerminatedOryza sativa L. · Rice
CIRAD-BIOS (FR)/Centre Francais du Riz (FR)
FR
4 records
Gavella
ActiveOryza sativa L. · Rice
Cooperativa de Productores de Semillas de Arroz S.C.L.
ES
4 records
EUSAKE02
ActiveOryza sativa L. · Rice
YANMAR R & D EUROPE S.R.L.
IT
3 records
Ercole
ActiveOryza sativa L. · Rice
S.I.S. SOCIETA' ITALIANA SEMENTI
IT
4 records
Egeo CL
ActiveOryza sativa L. · Rice
GENTINETTA EUGENIO
GR
3 records
Efe
ActiveOryza sativa L. · Rice
Sultan Sahin, Recep Kaya, Necmi Beser, Halil Surek,
UA
4 records
Deneb
TerminatedOryza sativa L. · Rice
BARONE ANDREA E PERUCCA EGIDIO
IT
3 records
Diva PV
ActiveOryza sativa L. · Rice
LUGANO LEONARDO SRL
IT
4 records
Corsa
ActiveOryza sativa L. · Rice
LUGANO LEONARDO SRL
IT
4 records
CRW3
ActiveOryza sativa L. · Rice
ENTE NAZIONALE RISI
IT
4 records
Clxl745
ActiveOryza sativa L. · Rice
RICE TEC INC.
IT
4 records
Carnise
ActiveOryza sativa L. · Rice
Sardo Piemontese Sementi Soc. Coop. Società Agricola
IT
4 records
Caravela
ActiveOryza sativa L. · Rice
Instituto Nacional de Investigação Agrária e Veterinária I.P. (INIAV) - Polo de Elvas
PT
4 records
Atlantis
TerminatedOryza sativa L. · Rice
S.I.S. SOCIETA' ITALIANA SEMENTI
IT
4 records
Paty
TerminatedOryza sativa L. · Rice
Centre Francais du Riz (FR)/CIRAD (FR)
FR
4 records
Gange
ActiveOryza sativa L. · Rice
BERTONE SEMENTI SPA
IT
3 records
Beauduc
ActiveOryza sativa L. · Rice
Centre Francais du Riz (FR)/CIRAD (FR)
FR
4 records
Wadikavir PV
ActiveOryza sativa L. · Rice
BASF S.A
ES
2 records