Inspire
ActiveFragaria x ananassa Duchesne ex Rozier · Garden strawberry
Steven D. Nelson Michael D. Nelson Leo W. Stoeckle Daniel S. Nelson
Diseases
Leaf spot diseases
Leaf spot diseases are a group of fungal, bacterial, or viral disorders manifesting as tissue necrosis in the form of spots of various shapes and colors. Pathogen development leads to a reduction in photosynthetic leaf area, tissue deformation, and significant yield losses.
Mentioned in descriptions 15 926 varieties reference book.
Leaf spot diseases represent a collective group of conditions caused by fungi, bacteria, or viruses. The primary diagnostic symptom is the formation of spots of various colors—brown, yellow, black, or gray—on the leaf blades, ranging from small dots to extensive necrotic lesions with or without margins. Infection often originates in the lower leaf canopy and, if allowed to develop, leads to premature defoliation and overall plant weakening.
Disease progression depends on a combination of favorable meteorological factors, such as moderately warm temperatures and high humidity, as well as the agrotechnical background. Improper crop rotation and the retention of crop residues in fields contribute to the accumulation of inoculum and intensive infection of crops in subsequent seasons. The severity of disease manifestation correlates directly with pathogen aggressiveness and the degree of cultivar susceptibility, which can lead to a 20–30% or greater reduction in crop productivity.
Cultivar resistance to leaf spots is a genetically determined ability to maintain productivity under disease pressure. It can be specific, targeting particular pathogen races, or non-specific polygenic, providing complex protection. Resistance mechanisms include physical barriers, such as waxy coatings, and biochemical responses. During variety testing, resistance is evaluated under natural and artificial inoculation conditions using scoring scales to record the degree of necrosis and pathogen development.
Breakdown by crop
Rose leaf spots
789
Tomato Leaf Spots
563
Barley Leaf Spot Diseases
541
Pepper Leaf Spots
277
Cucumber leaf spots
244
Leaf blotch — soft wheat
239
Leaf spots — Perennial ryegrass
181
Leaf spots — garden strawberry
141
Bean leaf spots
139
Leaf spots — tall fescue
125
Potato early blight
123
Peach Leaf Spots
120
Leaf spots of summer squash
107
Leaf Spot — Kentucky Bluegrass
105
Apple Leaf Spot
95
Maize leaf spots
82
Melon Leaf Spot
74
Olive leaf spot
71
Leaf spots — Creeping bentgrass
53
Carrot leaf blights
48
Leaf spots of red fescue
43
Maize leaf spots
35
Plum leaf spots
34
Triticale leaf spots
32
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.
Naomie
ActiveHordeum vulgare L. · Barley
Saaten Union Recherche (FR)
DE
EE
FR
LT
LV
UA
15 records
Thorgall
Protection expiredHordeum vulgare L. · Barley
SECOBRA RECHERCHES S.A.S
FR
HR
HU
LT
SI
UA
13 records
Milford
ActiveHordeum vulgare L. · Barley
SAATZUCHT JOSEF BREUN GMBH and CO.KG
DE
EE
FI
FR
LT
LU
15 records
Promiso
Activex Triticosecale Wittm. ex A. Camus · Triticale
Lantmannen SW Seed BV (NL)
AT
CZ
DE
FR
LT
PL
11 records
Yoda
ActiveHordeum vulgare L. · Barley
SAATZUCHT JOSEF BREUN GMBH and CO.KG
DE
EE
FI
FR
LT
UA
17 records
KWS Morris
ActiveHordeum vulgare L. · Barley
KWS LOCHOW GMBH, DE
AT
CZ
DE
FR
PL
10 records
Smart Regina KWS
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
BE
CZ
DE
IT
NL
SE
9 records
Xanthus
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
Maribo Seed International ApS
ES
FR
GR
LT
UA
8 records
Daisy
ActiveHordeum vulgare L. · Barley
SESVanderhave NV
CZ
DE
DK
EE
LT
10 records
LG Antigua
ActiveBrassica napus L. · Rapeseed
Reinhard Hemker
AT
BG
HU
LT
RO
SK
+1
10 records
DK Impression CL
ActiveBrassica napus L. · Rapeseed
MONSANTO TECHNOLOGY
BG
EE
HU
LT
RO
SK
+1
9 records
Silenta
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
SYNGENTA SEEDS| INAKTIV Syngenta Seeds GmbH
DE
ES
HR
HU
LT
UA
8 records
Sandpiper Smart
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
SESVANDERHAVE, N.V./S.A.
DK
ES
IT
LT
NL
SE
+1
8 records
Canyon
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
Societe Europeenne de Semences NV/SA (BE)
BE
CZ
FR
NL
PL
UA
8 records
Leidi
ActiveTriticum aestivum L. · Bread wheat
Mika Hyövelä, Esa Teperi, Boreal Plant Breeding Ltd.
EE
FI
LT
LV
SE
UA
13 records
Dorena
TerminatedBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE and CO KGAA
CZ
DE
FR
LT
NL
PL
9 records
Venezia
ActiveHordeum vulgare L. · Barley
Streng Wintergersten GbR
AT
CZ
DE
DK
LT
PL
12 records
SU Hetti
ActiveHordeum vulgare L. · Barley
W. von Borries-Eckendorf OHG, Leopoldshöhe DE
CZ
DE
EE
HU
LT
PL
10 records
Smart Mondea KWS
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE and CO KGAA
BE
DE
DK
ES
LT
SE
8 records
Polka
ActiveFragaria x ananassa Duchesne ex Rozier · Garden strawberry
Szkółka Markiewicz Agnieszka Markiewicz-Januszewska
DE
FR
HU
NL
PL
UA
15 records
Lavina
Protection expiredBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
DE
GR
HR
HU
IT
UA
8 records
KWS Chilis
ActiveHordeum vulgare L. · Barley
KWS Lochow
AT
CZ
DE
DK
EE
UA
10 records
Hector
ActiveSolanum lycopersicum L. · Tomato
SAS HM Clause (FR)
BG
FR
HR
PL
SI
SK
9 records