Diseases
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.
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.
Helianthus annuus L. · Sunflower
Kutishceva, Nataliia Shcudria, Larysa Odynets, Serhii Sereda, Valentyna
Vicia sativa L. · Common vetch
SEMILLAS BATLLE, S.A.
Brassica napus var. napus · Rapeseed
Breus Oksana Serhiivna, Parii IUliia Oleksandrivna, Sydorov Andrii Valeriiovych, Parii IAroslav Fedorovych, Parii Myroslav Fedorovych,
Brassica napus L. · Rapeseed
Sytnik Ihor Dynylovych
Helianthus annuus L. · Sunflower
SEEDECO Semences SRL (MD)
Helianthus annuus L. · Sunflower
Miklic Vladimir Jocic Sinisa Dusanic NenadSandra Cvejic Milan Jockovic Zaitsev Oleksii Kovalov Volodymyr
Brassica napus L. · Rapeseed
Holubiev Kostiantyn Viktorovych, Parii Myrosla Fedorovych,
Helianthus annuus L. · Sunflower
Reva IAroslav Mykolaiovych
Helianthus annuus L. · Sunflower
Pryvatne Pidpryiemstvo "NASINNEVE"
Helianthus annuus L. · Sunflower
Goran Malidza, Sinisa Jocic, Dragan Skoric,
Helianthus annuus L. · Sunflower
Reva IAroslav Mykolaiovych
Brassica napus L. · Rapeseed
Kakorin Mykhailo Oleksiiovych, Holubiev Konstiantyn Viktorovych, Parii Myroslav Fedorovych,
Helianthus annuus L. · Sunflower
EURALIS GENETIQUE
Helianthus annuus L. · Sunflower
Chekhov Anatolii Vasyl`ovych, Mischenko Liulmyla IUriivna, Lytovchenko Borys Kyrylovych, Pershyna Lilia Vasylivna, Shudria Larysa Ivanivna, Kutischeva Nataliia Mykolaivna,
Helianthus annuus L. · Sunflower
PIONEER HI-BRED INTERNATIONAL
Brassica napus L. · Rapeseed
Kakorin Mykhailo Oleksiiovych, Holubiev Kostiantyn Viktorovych, Parii Myroslav Fedorovych,
Helianthus annuus L. · Sunflower
Dusanic Nenad, Miklik Vladimir, Jocic Sinisa, Hladni Nada,
Helianthus annuus L. · Sunflower
Reva IAroslav Mykolaiovych
Helianthus annuus L. · Sunflower
Kalinichenko Artem Oleksandrovych, Didenko Kostiantyn Oleksandrovych,
Helianthus annuus L. · Sunflower
Cvejic, Sandra Dusanic, Nenad Jockovic, Milan Miklic, Vladimir Mykhno, Mykola Jocic, Sinisa
Glycine max (L.) Merr. · Soybean
Erik Hahnon
Helianthus annuus L. · Sunflower
MAS SEEDS
Helianthus annuus L. · Sunflower
Frank Jozsef / Duruczne Ocsko Edit / Ivan Jozsef / Nemeth Gizella / Palvoelgyi Laszlo / Szabo Antal
Helianthus annuus L. · Sunflower
Titov Serhii Ivanovych, Burlov Viktor Viktorovych, Burlov Viktor Vasylovych,