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
Miladinovic Dragana, Miklic Vladimir, Dusanic Nenad, Balalic Igor, Cvejic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Pankovic Dejana, Gvozdenovic Sandra, Jocsc Sinisa,
Helianthus annuus L. · Sunflower
Ovuka Jelena, Dimitrijevic Aleksandra, Radeka Ilija, Jockovic Milan, Jocic Sinisa, Cvejic Sandra,
Helianthus annuus L. · Sunflower
Dedic Bosko, Imerovski Ivana, Miladinovic Dragana, Cvejic Sandra, Jocic Sinisa,
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Helianthus annuus L. · Sunflower
Cvejic, Sandra Dusanic, Nenad Jockovic, Milan Miklic, Vladimir Mykhno, Mykola Jocic, Sinisa
Helianthus annuus L. · Sunflower
KOSOLAPOV SERGEJ NIKOLAEVICh / KOYuDA SERGEJ PETROVICh / DOROGOBED ALEKSEJ ALEKSEEVICh
Lactuca sativa L. · Lettuce
Enza Zaden Beheer B.V.
Helianthus annuus L. · Sunflower
LIMAGRAIN EUROPE S.A.
Helianthus annuus L. · Sunflower
KARPENKO OLEKSANDR, LUKIANCHYK IURII
Helianthus annuus L. · Sunflower
Karapira Serhii Ivanovych, Babich Valerii Ivanovych, Hanzhelo Mykola Hryhorovych, Krut`ko Vasyl` Ivanovych, Varenyk Borys Fedorovych, Veselyi Vitalii Oleksandrovych, Syvenko Valentyna Ivanivna, Kolomatska Valeriia Pavlivna, Makliak Kateryna Mykolaivna,
Pisum sativum L. · Pea
Vasylenko Antonina Oleksandr, Serdiuk Vira Ivanivna, Lutsenko Mykola Petrovych, Bekorevych Alla Davydivna, Bezuhlyi Ihor Mykolaiovych, Chekryhin Petro Mykheiovych,
Helianthus annuus L. · Sunflower
Euralis Semences FR
Helianthus annuus L. · Sunflower
EURALIS SEMILLAS, S.A.
Papaver somniferum L. · Opium poppy
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Brassica napus var. napus · Rapeseed
Breus Oksana Serhiivna, Davydiuk Ihor Mykolaiovych, Parii IUliia Oleksandrivna, Koval`chuk Zoreslava Volodymyrivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,
Hordeum vulgare L. · Barley
Lohvinenko IUrii Volodymyrovych, Dmytrenko Petro Petrovych,
Helianthus annuus L. · Sunflower
MIHSAN Ltd - Sofia (BG)
Pisum sativum L. · Pea
Limagrain UK
Helianthus annuus L. · Sunflower
VELI PEKCAN, TAHIR GUCER, GOKSEL EVCI, YALCIN KAYA, IBRAHIM YILMAZ
Helianthus annuus L. · Sunflower
CECOSA
Vitis L. · Grapevine
MARCULESCU MIRCEAGORJAN SERGIU STEFANTRUSCA ION BOGDANPOPESCU RALUCA IULIANA
Cucumis sativus L. · Cucumber
Srbek Liubosh, Oliva IAn, Horal Irzhi, Tyshkovs`kyi Volodymyr Mykhailovych,
Lactuca sativa L. · Lettuce
MERIDIEM SEEDS S.L.