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.
Pisum sativum L. · Pea
CRITES SEEDS
Pisum sativum L. · Pea
Limagrain UK
Vicia sativa L. · Common vetch
Danko Hodowla Roslin Sp.z.o.o.
Triticum durum Desf. · Durum wheat
Carlo Invernizzi
Triticum aestivum L. · Bread wheat
ISEA S.R.L
x Triticosecale Wittm. ex A. Camus · Triticale
LEMAIRE DEFFONTAINES S.A.S.
Triticum aestivum L. · Bread wheat
Borislav Kobiljski
Hordeum vulgare L. · Barley
LIMAGRAIN EUROPE
Triticum aestivum L. · Bread wheat
UNIGENETIC (BG)
Triticum aestivum L. · Bread wheat
Apsovsementi, I
x Triticosecale Wittm. ex A. Camus · Triticale
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Triticum durum Desf. · Durum wheat
Syngenta Participations AG
Pisum sativum L. · Pea
Seminis Vegetable Seeds
Triticum durum Desf. · Durum wheat
S.I.S. SOCIETA' ITALIANA SEMENTI
Triticum durum Desf. · Durum wheat
Societa Produttori Sementi S.p.A
Triticum aestivum L. · Bread wheat
KWS UK LTD
Hordeum vulgare L. · Barley
Herasymova Anastasiia Ivanivna, Suprunenko Viktoriia Mykolaivna, Levshtanov Serhii Oleksandrovych, Ostanina Tamara Vitaliivna, Sukhorada Oleksii Ivanovych, Kremzina Ol`ha Mykhailivna, Vasiukov Pavlo Petrovych, Kuznietsova Tamara IEvheniivna, Serkin Mykola
Hordeum vulgare L. · Barley
Apsovsementi S.p.A., CREA-GB
Triticum aestivum L. · Bread wheat
SAULESCU NICOLAEITTU GHEORGHEGIURA AURELITTU MARIANAMUSTATEA POMPILIU
Triticum aestivum L. subsp. spelta (L.) Thell. · Spelt
PZO-Pflanzenzucht Oberlimpurg
Triticum durum Desf. · Durum wheat
APSOVSEMENTI S.P.A.
Triticum aestivum L. · Bread wheat
Danko Hodowla Roslin Sp.z.o.o.
Beta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
Beta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA