XL 723
TerminatedOryza sativa L. · Rice
RICE TEC INC.
ES
2 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.
Wadiana PV
ActiveOryza sativa L. · Rice
BASF S.A
ES
2 records
Tigre
ActiveOryza sativa L. · Rice
ENTE NAZIONALE RISI
IT
3 records
SZV Szellő
ActiveOryza sativa L. · Rice
NAIK Öntözési és Vízgazdálkodási Önálló Kutatási Oszály, Szarvas
HU
2 records
Susan
TerminatedOryza sativa L. · Rice
Semillas Certificadas Castells S.L.
ES
3 records
Salvo
TerminatedOryza sativa L. · Rice
Giampiero Vale^^^Elisabetta Lupotto
IT
3 records
Mirwa
ActiveOryza sativa L. · Rice
BILONI MASSIMO ITALY
BG
2 records
Mareny
TerminatedOryza sativa L. · Rice
INIA/IVIA
ES
3 records
Mida
TerminatedOryza sativa L. · Rice
ENTE NAZIONALE RISI
IT
2 records
Luxor
TerminatedOryza sativa L. · Rice
CREA-CENTRO DI RICERCA INGEGNERIA E TRASFORMAZIONI AGROALIMENTARI (CREA-IT-RM)
IT
2 records
Icaro
TerminatedOryza sativa L. · Rice
ENTE NAZIONALE RISI
IT
2 records
Ispaniki "A"
Protection expiredOryza sativa L. · Rice
HAO-DEMETER - Cereal Institute
GR
3 records
Fortunato
ActiveOryza sativa L. · Rice
Massimo Biloni
BG
3 records
Clxl729
ActiveOryza sativa L. · Rice
RICE TEC INC.
IT
2 records
Copsemar 8
ActiveOryza sativa L. · Rice
COOP. PRODUCTORES SEMILLAS DE ARROZ, SCL (COPSEMAR)
ES
2 records
Cormorán
ActiveOryza sativa L. · Rice
IVIA (DPTO. ARROZ)/INIA
ES
3 records
CL261
ActiveOryza sativa L. · Rice
Louisiana State University Agricultural Center
IT
2 records
Baixet
TerminatedOryza sativa L. · Rice
IVIA (DPTO. ARROZ)/INIA
ES
3 records
Alessio CL
ActiveOryza sativa L. · Rice
Eugenio Gentinetta (IT)
BG
2 records
SJKK
ActiveOryza sativa L. · Rice
Bertone Sementi S.p.A.
Nero Beppino
ActiveOryza sativa L. · Rice
Società Agricola Melotti Giuseppe & C. s.s.
Hispalong
ActiveOryza sativa L. · Rice
INSTITUTO HISPANICO DEL ARROZ, S.A. (HISPARROZ)
ES
4 records
Visialong Pv
ActiveOryza sativa L. · Rice
INSTITUTO HISPANICO DEL ARROZ, S.A. (HISPARROZ)
ES
3 records
Renar
ActiveOryza sativa L. · Rice
Tuman`ian Natalia Heorhiivna, Kharchenko Olena Semenivna, Kharitonov IEvhenii Mykhailovych, Kizinek Serhii Volodymyrovych, Los` Halyna Danylivna, Zynnyk Oleksandr Mykolaiovych, Kovalev Viktor Saveliiovych,
UA
4 records