Teleno
Application submittedLactuca sativa L. · Lettuce
Vilmorin-Mikado SAS (FR)
FR
1 record
Diseases
Downy mildew
Peronosporaceae
Downy mildew is a dangerous plant disease caused by oomycetes under high humidity conditions. It manifests as a characteristic growth on the underside of leaves and spotting, which leads to rapid death of vegetative mass and yield reduction.
Mentioned in descriptions 16 384 varieties reference book.
Downy mildew is a group of diseases caused by specialized oomycetes. The disease manifests as the appearance of yellowish or brown angular spots on the upper side of the leaves, delimited by veins. On the underside of the leaf, under humid conditions, a characteristic grey-violet, white, or bluish fuzzy growth forms. Pathogen development leads to yellowing and drying of leaves, stunting of plants, and deformation of fruits, which, in the case of high pathogen aggressiveness, can lead to crop death in a short period.
Disease development depends directly on meteorological conditions and agronomic practices. The pathogen prefers a cool, humid environment, with critical risk factors being heavy dew, fog, prolonged rain, high air humidity, and crop density. Optimal conditions for infection include nighttime temperatures in the range of +13…+20°C and the presence of droplet moisture on the leaf surface for more than 6 hours.
Assessment of variety resistance during variety testing is based on phytopathological recording of the degree of leaf damage, specialized screening of collection samples, and molecular analysis methods using DNA markers to find genetic donors of resistance. In production, a distinction is made between genetically resistant varieties possessing specific Dm-genes and tolerant forms capable of maintaining yield under infection due to active vegetative mass formation. Since new pathogen races can overcome genetic resistance, varieties require regular monitoring and renewal.
Breakdown by crop
Downy mildew of lettuce
2 007
Downy mildew of sunflower
905
Downy Mildew of Cucumber
394
Downy mildew of spinach
387
Downy Mildew of Pea
159
Downy Mildew (Peronospora) — Soybean
65
Downy Mildew of Hops
60
Downy mildew — Onion
59
Downy Mildew of Grapevine
58
Downy Mildew of Melon
48
Downy mildew — bulb onion
48
Downy mildew of radish
47
Downy mildew of basil
46
Downy mildew — broccoli
43
Downy Mildew of Grapevine
33
Downy mildew — New Guinea impatiens
32
Downy mildew of rapeseed
24
Downy mildew of zucchini
20
Downy mildew of wall rocket
19
Downy mildew — cauliflower
18
Downy mildew — lettuce
18
Downy mildew — head lettuce
18
Downy Mildew — Impatiens walleriana
18
Downy mildew — cabbage
17
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.
Taverna
ActiveGlycine max (L.) Merr. · Soybean
Mursakaiev El`dar Shamil`ovych, Molodchenkova Olha Olehivna, Bushulian Oleh Volodymyrovych, Hanzhelo Olha Ivanivna, Lavrova Halyna Dmytrivna, Sichkar Viacheslav Ivanovych,
UA
2 records
Syn Polka F1
TerminatedCucumis sativus L. · Cucumber
Kyrylov Mykhailo Ivanovych, Dubinin Serhii Volodymyrovych,
UA
2 records
Tangra
ActiveVitis vinifera L. · Common grape vine
Ivan Todorov, Galina Dyakova
BG
2 records
SUPERALFA DE CLUJ
TerminatedHumulus lupulus L. · Common hop
MUNTEAN LEON SORINCERNEA SOLOVASTRUSALONTAI ALEXANDRUMORAR GAVRILAVARBAN DANMUNTEAN LEONDUDA MARCELMUNTEAN SORINVARBAN RODICATOFANA MARIA
RO
1 record
Szatmar F1
TerminatedCucumis sativus L. · Cucumber
(Ulveczki Gabriella), (Dr.Szarka Janos), (Balogh Peter),
UA
1 record
Sweet Forever BMR
WithdrawnSorghum x drummondii (Steud.) Millsp. & Chase · Sudangrass
GAYLAND WARD SEED CO. INC.
IT
1 record
Super Sugar DM
WithdrawnSorghum x drummondii (Steud.) Millsp. & Chase · Sudangrass
GAYLAND WARD SEED CO. INC.
IT
1 record
Storgoziya
ActiveVitis vinifera L. · Common grape vine
Yordan K. Ivanov, Vasil Y. Valchev, Georgi S. Petkov
BG
2 records
STR456
TerminatedHelianthus annuus L. · Sunflower
Seedtec International Inc (US)
FR
1 record
Sugrasixteen N
ActiveVitis vinifera L. · Common grape vine
Sun World International, Inc (US)
FR
1 record
Super Sugar
Application submittedSorghum x drummondii (Steud.) Millsp. & Chase · Sudangrass
GAYLAND WARD SEED CO. INC.
IT
1 record
Starcovert
TerminatedPisum sativum L. · Pea
Andre Blondeau Semences (FR)
FR
1 record
Summer Dance
ActiveCucumis sativus L. · Cucumber
TAKII EUROPE B V
NL
1 record
Sremianin F1
Application submittedCucumis sativus L. · Cucumber
Arkadiusz Labrzycki
UA
1 record
Sukholymans'kyi bіlyi
ActiveVitis vinifera L. · Common grape vine
Kostiuk Oleksii Nikiforovych, Dokuchaieva IEvheniia Mykolaivna, Tsebrii Mykhailo Petrovych, Aivazian Petros Karapetovych,
UA
1 record
S-PRO-511
Application submittedHelianthus annuus L. · Sunflower
Tovarystvo z obmezhenoiu vidpovidalnistiu «IEvrosem»
UA
2 records
Soltan
ActiveHelianthus annuus L. · Sunflower
Hyskie Ivan Mykolaiovych, Bohdan Ihor` Vyktorovych,
UA
2 records
Spunky
WithdrawnCucumis sativus L. · Cucumber
Harris Moran Seed Company (USA) (US)
FR
1 record
Sonate F1
ActiveCucumis sativus L. · Cucumber
Ab Van Ende, Kiis Van de Maas,
UA
1 record
Souvignier Gris
ActiveVitis vinifera L. · Common grape vine
Dr. Norbert Becker im Staatl. Weinbauinstitut
DE
2 records
SMILJANA
TerminatedGlycine max (L.) Merr. · Soybean
Poljoprivredni Institut Osijek, HR
HR
1 record
Siyana
ActiveVitis vinifera L. subsp. vinifera · Wine grape
Ivan D. Todorov
BG
2 records
Snihova koroleva
Protection expiredBrassica napus L. · Rapeseed
Sytnik Ihor Danylovych
UA
2 records