Indio
ActiveSolanum lycopersicum L. · Tomato
Sakata Vegetables Europe S.A.S
UA
3 records
Diseases
Tomato Early Blight
Solanum lycopersicum L.
A fungal disease of tomatoes caused by Alternaria solani, characterized by the appearance of spots with concentric zonation on leaves, stems, and fruits. Variety resistance is primarily polygenic in nature.
In the reference 220 varieties crop Tomato, where this is mentioned in the description.
The primary pathogen of tomato early blight is the fungus Alternaria solani Sorauer; small-spored species such as Alternaria alternata and Alternaria tomatophila also occur. The disease affects all above-ground plant organs, manifesting on leaves as dark brown spots with distinct concentric zonation and a yellow halo. Elongated spots appear on stems and petioles, leading to cracking and tissue breakage, while fruit infection is most often localized in the peduncle area in the form of sunken, dry, dark spots.
Unlike a number of other tomato diseases, no clear dominant resistance genes used in standard variety coding descriptions have been identified for early blight. In international practice, the codes As (for Alternaria solani) and Aal (for Alternaria alternata f. sp. lycopersici) are used to denote resistance to the pathogen. Due to the polygenic nature of resistance, breeding programs typically assess the level of tolerance or the degree of plant susceptibility using scoring scales rather than the presence of specific genes.
General information about the subject — on the page Alternaria blight.
Varieties of Tomato mentioned in the description
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.
Heinz2128
ActiveSolanum lycopersicum L. · Tomato
HEINZSEED
PT
3 records
Heinz2127
ActiveSolanum lycopersicum L. · Tomato
HEINZSEED
PT
3 records
Heinz7709
TerminatedSolanum lycopersicum L. · Tomato
HEINZSEED
PT
2 records
Godoria
ActiveSolanum lycopersicum L. · Tomato
Bakker Brothers Gebroeders Bakker Zaadteelt en Zaadhandel BV
PL
2 records
General
ActiveSolanum lycopersicum L. · Tomato
Sakata Vegetables Europe S.A.S
UA
3 records
Empire
TerminatedSolanum lycopersicum L. · Tomato
PETOSEED CO
ES
2 records
Dorada
ActiveSolanum lycopersicum L. · Tomato
Dr. Horneburg Bernd, Georg-August-Universität Göttingen
AT
2 records
Daytona
Protection expiredSolanum lycopersicum L. · Tomato
Hybrids Ellas Abee
GR
2 records
Defiant
TerminatedSolanum lycopersicum L. · Tomato
Johnny's Selected Seeds
NL
2 records
Colusa
Protection expiredSolanum lycopersicum L. · Tomato
Harris Moran Seed Company
FR
3 records
Contessa
TerminatedSolanum lycopersicum L. · Tomato
PETOSEED CO
ES
3 records
Cannery Row
TerminatedSolanum lycopersicum L. · Tomato
Ferry Morse Seed Co.(USA) (US)
FR
3 records
Christian
TerminatedSolanum lycopersicum L. · Tomato
WESTERN SEED ESPAÑA, S.A.
ES
2 records
BULLSEYE
ActiveSolanum lycopersicum L. · Tomato
Syngenta Crop Protection AG
UA
2 records
Cherokee purple
ActiveSolanum lycopersicum L. · Tomato
Domaine Public (FR)
FR
2 records
Butte
Protection expiredSolanum lycopersicum L. · Tomato
Harris Moran Seed Company
FR
2 records
Batool
ActiveSolanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
NL
2 records
Atlantic City
Protection expiredSolanum lycopersicum L. · Tomato
Ferry Morse Seed Co.(USA) (US)
FR
2 records
BB2
ActiveSolanum lycopersicum L. · Tomato
Seminis Vegetable Seeds
NL
3 records
Rio fuego
Protection expiredSolanum lycopersicum L. · Tomato
BG
ES
3 records
Voyager
Protection expiredSolanum lycopersicum L. · Tomato
NL
SK
3 records
Meltine
TerminatedSolanum lycopersicum L. · Tomato
ES
NL
3 records
Ace 55 VF
ActiveSolanum lycopersicum L. · Tomato
BG
ES
3 records