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
KWS UK LTD
Triticum aestivum L. · Bread wheat
Pyter IAnosh, Khady Heza, Sundy Tamosh, Marton L. Chaba,
x Triticosecale Wittm. ex A. Camus · Triticale
Danko Hodowla Roslin Sp.z.o.o.
Avena sativa L. · Oat
Lantmaennen ek foer
Triticum aestivum L. · Bread wheat
RAGT 2n
Helianthus annuus L. · Sunflower
PHILIPPE JOUVE
Hordeum vulgare L. · Barley
PLANT SELECT, SPOL. S R.O.
Pisum sativum L. · Pea
Výzkumné Centrum Selton s.r.o., Selgen A.S.
Triticum aestivum L. · Bread wheat
Syngenta Participations,CH
Hordeum vulgare L. · Barley
Syngenta Participations AG
Triticum aestivum L. · Bread wheat
Syngenta Hadmersleben
Triticum aestivum L. · Bread wheat
Wiersum Plantbreeding B.V.
Pisum sativum L. · Pea
Poznanska Hodowla Roslin Sp. z o.o
x Triticosecale Wittm. ex A. Camus · Triticale
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Triticum aestivum L. · Bread wheat
Syngenta Participations AG| CH
Triticum durum Desf. · Durum wheat
Ragt 2n, F
x Triticosecale Wittm. ex A. Camus · Triticale
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Triticum durum Desf. · Durum wheat
Saatzucht Donau GmbH & Co.KG
Hordeum vulgare L. · Barley
Zahynailo Mykola Ivanovych, Lehkun Ihor Borysovych, Babash Andrii Borysovych, Zahynailo Mykola Ivanovych, Perekhrest Valentyna Arkhypivna, Tarasiuk Vasyl` Prokopovych, Kirdohlo IEvhen Kostiantynovych, Linchevskyi Anatolii Adamovych,
Triticum durum Desf. · Durum wheat
Societa Produttori Sementi S.p.A
x Triticosecale Wittm. ex A. Camus · Triticale
Poznanska Hodowla Roslin
Triticum aestivum L. · Bread wheat
Zoltán Bedő^^^László Láng^^^Ottó Veisz^^^Gyula Vida^^^Ildikó Karsai^^^Mariann Rákszegi^^^Klára Mészáros
x Triticosecale Wittm. ex A. Camus · Triticale
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Pisum sativum L. · Pea
Thomas Blumtritt