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.
Hordeum vulgare L. · Barley
Dem'ianenko Alla Ivanivna, Kuz`menko Halyna Iosypivna, Morhun Volodymyr Vasylovych, Shubenko Nadiia Petrivna,
Cucurbita pepo L. · Field pumpkin
Syngenta Crop Protection AG
x Triticosecale Wittm. ex A. Camus · Triticale
Padalka Olena Ivanivna, Chernobai Serhii Volodymyrovych, Shcechenko Olha IEvheniivna, Melnyk Vira Serhiivna, Kapustina Tetiana Borysivna, Riabchun Viktor Kuzmych,
Triticum aestivum L. · Bread wheat
Holyk Liubov Mykolaivna, Khomenko Svitlana Olehivna, Remeslo Volodymyr Vasyl`ovych, Dubovyi Volodymyr Ivanovych, Shelepov Volodymyr Vasyl`ovych, Ulich Oleksandr Leonidovych, Artemchuk Iryna Petrivna, Lohvynenko Valentyna Fedorivna, Morhun Volodymyr Vasylo
Prunus persica (L.) Batsch · Peach
Oriekhova Valentyna Petrivna, Smykov Volodymyr Karpovych, Perfil`ieva Zoia Mykolaivna,
Chrysanthemum x morifolium Ramat. · Florist's daisy
VANDENBERG| Cornelis P. Vandenberg
Beta vulgaris Sugar Beet Group · Sugar beet
Borysova Tetiana Oleksandvivna, Borysova Larysa Serhiivna, Fedorenko Inha Anatoliivna, Mel`nychuk IUrii Viktorovych, Mel`nyk Nadiia Serhiivna, Malihon Halyna Serhiivna, Zmiievs`kyi Volodymyr Mykolaiovych, Chemerys Lina Mykolaivna, Panov Mykhailo Ivanovych
Cucumis sativus L. · Cucumber
SEMILLAS FITO, S.A.
Capsicum annuum L. · Bell pepper
Syngenta Crop Protection AG
Triticum aestivum L. · Bread wheat
Kyrylenko Vira Viktorivna, Kolomiiets` Lidiia Andriivna, Khomenko Svitlana Olehivna, Marynka Svitlana Mykolaivna, Vlasenko Volodymyr Anatoliiovych, Artemchuk Iryna Petrivna, Morhun Volodymyr Vasylovych,
Glycine max (L.) Merr. · Soybean
Scherbyna Oleksandr Zinoviievych, Chernenko IEvhen Viktorovych, Polischuk Svitlana Viktorivna, Tymoshenko Oleksandr Oleksiiovych, Shcerbyna Olena Zinoviivna, Romaniuk Lidiia Serhiivna, Mykhailov Viacheslav Hryhorovych,
Triticum aestivum L. · Bread wheat
Novikov Oleksii Volodymyrovych, Zyma Valentyna Hryhorivna, Bukreeva Halyna Ivanivna, Konotop Tetiana Vitaliivna, Filobok leontii Petrovych, Kudriashov Ihor Mykolaiovych, Alfimov Volodymyr Oleksiiovych, Lysak Mykola Ivanovych, Kerimov Vahyf Rakhmetovych, F
Fragaria L. · Strawberry
Marcel van der Voorde
x Triticosecale Wittm. ex A. Camus · Triticale
SHCHYPAK HENNADII VASYLOVYCH, SYVOKIN INNA VALENTYNIVNA, BORIVSKYI ANATOLII FRANTSOVYCH, NYCHOPORUK OLENA OLEKSANDRIVNA, BILOKURETS NATALIIA PETRIVNA, CHERNOBAB RAISA ANDRIIVNA
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Niwa Hodowla Roślin Jagodowych sp. z o.o.
Nicotiana tabacum L. · Tobacco
Instytut Uprawy Nawożenia i Gleboznawstwa Państwowy Instytut Badawczy
Malus domestica (Suckow) Borkh. · Apple
Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka
Triticum aestivum L. · Bread wheat
Landwirtschaftliche Bundesversuchswirtschaften Ges.m.b.H.
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Solanum lycopersicum L. · Tomato
Axia NL B.V.
Cucurbita pepo L. · Field pumpkin
Shevchenko Igor
Triticum aestivum L. · Bread wheat
Pokotylo Mariia Ivanivna, Sabadin Nila Anatoliivna, Hirko Volodymyr Serhiiovych,