Elettra
ActiveOryza sativa L. · Rice
Almo S.p.A.
IT
5 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.
Ducato
ActiveOryza sativa L. · Rice
Giampiero Vale^^^Elisabetta Lupotto
IT
5 records
Dardo
ActiveOryza sativa L. · Rice
Almo S.p.A.
IT
6 records
Cl111
ActiveOryza sativa L. · Rice
Louisiana State University Agricultural Center
IT
5 records
CL28
ActiveOryza sativa L. · Rice
ENTE NAZIONALE RISI
IT
5 records
CL12
ActiveOryza sativa L. · Rice
Ente Nazionale Risi, BASF Agrochemical Products B.V.
IT
5 records
CL46
ActiveOryza sativa L. · Rice
Ente Nazionale Risi, BASF Agrochemical Products B.V.
IT
5 records
CL33
ActiveOryza sativa L. · Rice
ENTE NAZIONALE RISI
IT
5 records
Albatros
ActiveOryza sativa L. · Rice
Almo S.p.A.
IT
5 records
Halilbey
ActiveOryza sativa L. · Rice
Trakya Agricultural Research Institute (TR)
BG
4 records
VI.NA.RPi
ActiveOryza sativa L. · Rice
BERTONE SEMENTI SPA / CREA- CENTRO DI RICERCA PER LA CEREALICOLTURA (CREA-CI-VC)
IT
4 records
IRES 1117
ActiveOryza sativa L. · Rice
BILONI MASSIMO
IT
3 records
Copsemar 7
ActiveOryza sativa L. · Rice
Cooperativa de Productores de Semillas de Arroz S.C.L.
ES
4 records
Copsemar 9
ActiveOryza sativa L. · Rice
Cooperativa de Productores de Semillas de Arroz S.C.L.
ES
4 records
CL142-AR
ActiveOryza sativa L. · Rice
The Board Of Trustees Of The University Of Arkansas
CL181-AR
ActiveOryza sativa L. · Rice
The Board Of Trustees Of The University Of Arkansas
Tarriso
TerminatedOryza sativa L. · Rice
IT
PT
4 records
Onda
ActiveOryza sativa L. · Rice
IT
PT
5 records
Maratelli
ActiveOryza sativa L. · Rice
HR
IT
5 records
Bomba
ActiveOryza sativa L. · Rice
ES
4 records
Leda
ActiveOryza sativa L. · Rice
INIA/IVIA
ES
IT
4 records
Stradivari
ActiveOryza sativa L. · Rice
S.I.S. SOCIETA' ITALIANA SEMENTI
IT
4 records
Forte
ActiveOryza sativa L. · Rice
BILONI MASSIMO
IT
3 records
Caroly
ActiveOryza sativa L. · Rice
RISO GALLO S.P.A.
IT
4 records