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
G. Mihova, S. Tsvetkov, I. Iliev, T. Petkova, V. Ivanova, S. Doneva, I. Ivanova, D. Yordanova, A. Ivanova
Triticum durum Desf. · Durum wheat
GENETIC SERVICES S.R.L.
Hordeum vulgare L. · Barley
G. Mihova, S. Tsvetkov, I. Iliev, T. Petkova, V. Ivanova, S. Doneva, I. Ivanova, D. Yordanova, A. Ivanova
Linum usitatissimum L. · Common flax
Edith von Bourscheidt
Pisum sativum L. · Pea
SEMILLAS BATLLE S.A.
Triticum aestivum L. · Bread wheat
Matuz Janos / Kertesz Zoltanne / Kertesz Zoltan / Banhidy Judit / Csoesz Laszlone / Beke Bela / Cseuz Laszlo / Mesterhazy Akos / Acs Peterne / Falusi Janos / Petroczi Istvan / Papp Maria
Triticum aestivum L. · Bread wheat
ABED FONDEN
Hordeum vulgare L. · Barley
FILIPPOV EVGENIJ GRIGOR'EVICh / DONTSOVA ALEKSANDRA ALEKSANDROVNA / DONTSOV DMITRIJ PETROVICh / TERNOVAYa ELENA ALEKSANDROVNA / DOROShENKO E'DUARD SERGEEVICh / SARYChEVA NINA IVANOVNA / DOROShENKO EKATERINA SERGEEVNA / SKVORTSOVA YuLIYa GENNAD'EVNA / OVSY
Triticum aestivum L. · Bread wheat
Pernilla Vallenback
x Triticosecale Wittm. ex A. Camus · Triticale
ITTU GHEORGHESAULESCU NICOLAEITTU MARIANAMUSTATEA POMPILIUMARINCIU CRISTINA MIHAELASERBAN GABRIELA
Pisum sativum L. · Pea
Agri-Obtentions S.A., Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE)
Hordeum vulgare L. · Barley
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Triticum durum Desf. · Durum wheat
HAO-DEMETER - Cereal Institute
Triticum durum Desf. · Durum wheat
Golden West Seed Co.
Hordeum vulgare L. · Barley
Lietuvos agrarinių ir miškų mokslų centras
Triticum aestivum L. · Bread wheat
Lietuvos agrarinių ir miškų mokslų centras
x Triticosecale Wittm. ex A. Camus · Triticale
Valentin Georgiev, Tatyana Petrova, Iliya Iliev, Vanya Ivanova
Triticum durum Desf. · Durum wheat
Institut national de recherche pour l'agriculture, l'aliment (FR)/Agri Obtentions SA (FR)
Hordeum vulgare L. · Barley
APP Agroresursu un ekonomikas institūts
Avena sativa L. · Oat
NORDSAAT SAATZUCHT
Pisum sativum L. · Pea
Van Waveren Saaten GmbH
Secale cereale L. · Rye
Danko Hodowla Roslin Sp.z.o.o.
x Triticosecale Wittm. ex A. Camus · Triticale
Danko Hodowla Roslin Sp.z.o.o.
Hordeum vulgare L. · Barley
GENETIC SERVICES S.R.L.