Diseases
Erysiphales
Powdery mildew is a fungal disease manifesting as a white web-like coating on plant organs, leading to tissue necrosis, fruit deformation, and significant crop losses.
Mentioned in descriptions 33 570 varieties reference book.
Powdery mildew is caused by ectoparasitic fungi of the order Erysiphales, which develop primarily on the surface of leaves, shoots, and fruits. The initial white web-like coating eventually densifies into "powdery" cushions, upon which fungal fruiting bodies may form as dark spots. As a result of the infection, tissues turn yellow and become necrotic, fruits may crack, and leaves drop prematurely.
The intensity of disease development depends on a complex of factors: high relative humidity, moderate temperatures, the presence of dense canopy, and excessive nitrogen nutrition. Risks increase with alternating dry and wet weather. The harmfulness of the disease is expressed in a reduction of the leaf assimilation area, deterioration of crop quality, and a decrease in the general winter hardiness of crops.
Assessment of variety resistance is conducted under field conditions at various stages of vegetation, most often during the full heading phase. To classify the degree of infection, scoring systems or intensity scales in percentages are used, where varieties with up to 10% infection are considered highly resistant (R), 11 to 40% as moderately resistant (M), and more than 41% as susceptible (S). Variety resistance is ensured by genetic mechanisms that prevent colonization by the pathogen or limit the development of its mycelium.
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.
Triticum aestivum L. · Bread wheat
Los Ruslan Mykolaiovych, Prokopik Nataliia Ivanivna, Pravdziva Iryna Volodymyrivna, Dubovyk Nataliia Serhiivna, Volohdina Halyna Borysivna, Zamlila Nina Petrivna, Kyrylenko Vira Viktorivna, Derhachov Oleksandr Leonidovych, Humeniuk Oleksandr Volodymyrovyc
Hordeum vulgare L. · Barley
HUDZENKO VOLODYMYR, DEMYDOV OLEKSANDR, KOCHMARSKYI VALENTYN, BOBYR OLHA, POLISCHUK TETIANA
Rosa L. · Rose
ALAIN ANTOINE MEILLAND (FR)
Rosa L. · Rose
ALAIN ANTOINE MEILLAND (FR)
Vitis vinifera L. · Common grape vine
José Ignacio Fernández Fernández/Leonor Ruiz García/María Rocío Gil Muñoz/Diego José Fernández /María José Giménez Bañón/Juan Daniel Moreno Olivares/Celia Martínez Mora/Juan Antonio Bleda Sánchez/Adrián Martínez Cutillas
Vitis vinifera L. · Common grape vine
Dr. Norbert Becker im Staatl. Weinbauinstitut
Hordeum vulgare L. · Barley
ZAAIZAAD
Rosa L. · Rose
ALAIN ANTOINE MEILLAND (FR)
Cucumis sativus L. · Cucumber
Shevchenko Andrii Oleksiiovych
Rosa L. · Rose
ALAIN MEILLAND
Triticum aestivum L. · Bread wheat
Pravdziva Iryna Volodymyrivna, Siroshtan Andrii Anatoliiovych, Dubovyk Nataliia Serhiivna, Volohdina Halyna Borysivna, Kolomiiets` Lidiia Andriivna, Zamlila Nina Petrivna, Kochmarskyi Valentyn Serhiiovych, Kyrylenko Vira Viktorivna, Humeniuk Oleksandr Vol
Triticum aestivum L. · Bread wheat
Zamlila Nina Petrivna, Yurchenko Tetiana Vasylivna, Derhachov Oleksandr Leonidovych, Khomenko Svitlana Olehivna, Kyrylenko Vira Viktorivna, Humeniuk Oleksandr Volodymyrovych, Vlasenko Volodymyr Anatoliiovych, Demydov Oleksandr Anatoliiovych, Pirych Alina
Hordeum vulgare L. · Barley
Yankovs`ki Mykola Hryhorovych, Derov Anatolii Ivanovych, Ihnat`ieva Nataliia Henadiivna, Repko Nataliia Volodymyrivna, Aleksandrova Liudmyla Oleksandrivna, Prykhod`ko Liudmyla Petrivna, Filippov IEvhenii Hryhorovych, Sokol Oleksandr Andriiovych,
Cucumis melo L. · Melon
MARIA-ANGELES BUIL BENEDI
Prunus persica (L.) Batsch · Peach
Fedorova Ol`ha Stepanivna, Smykov Volodymyr Karpovych, Smykov Anatolii Volodymyrovych, Parfil`ieva Zoia Mykolaivna,
Cucumis sativus L. · Cucumber
GENESIS SEEDS LTD
Malus domestica (Suckow) Borkh. · Apple
MARRAS ANDRE (FR)
Rosa L. · Rose
Jean Pierre GUILLOT (FR)/Dominique MASSAD (FR)
Rosa L. · Rose
Dominique MASSAD (FR)
Cucumis sativus L. · Cucumber
Dymchenko Tetiana Mykolaivna, Muzhylko Viktor Valentynovych,
Malus domestica (Suckow) Borkh. · Apple
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Cucumis sativus L. · Cucumber
Enza Zaden Beheer B.V.
Vitis vinifera L. · Common grape vine
INCONNU (FR)
Humulus lupulus L. · Common hop
Deutsche Gesellschaft für Hopfenforschung