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
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Hordeum vulgare L. · Barley
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
x Triticosecale Wittm. ex A. Camus · Triticale
ISEA S.r.l.^^^ENEA
Hordeum vulgare L. · Barley
Apsovsementi S.p.A., CREA-GB
Triticum durum Desf. · Durum wheat
F.LLI COZZI S.N.C.
x Triticosecale Wittm. ex A. Camus · Triticale
GENETIC SERVICES S.R.L.
Triticum aestivum L. · Bread wheat
SELGEN A.S
Triticum aestivum L. · Bread wheat
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Triticum aestivum L. · Bread wheat
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Triticum aestivum L. · Bread wheat
Zoltán Bedő^^^László Láng^^^Ottó Veisz^^^Gyula Vida^^^Mariann Rákszegi^^^Klára Mészáros^^^Ildikó Karsai^^^Katalin Puskás
Hordeum vulgare L. · Barley
Malopolska Hodowla Roslin Spolka z o.o.
Avena sativa L. · Oat
SELGEN A.S
Hordeum vulgare L. · Barley
VASILESCU LILIANABUDE ALEXANDRUPETCU ELENACIUCA MATILDA
Avena sativa L. · Oat
KWS MOMONT RECHERCHE SARL, FR
Triticum aestivum L. · Bread wheat
KWS MOMONT RECHERCHE SARL, FR
Avena sativa L. · Oat
KWS MOMONT RECHERCHE SARL, FR
Triticum aestivum L. · Bread wheat
KWS Momont Recherche Sarl
Triticum aestivum L. · Bread wheat
Danko Hodowla Roslin Sp.z.o.o.
Triticum aestivum L. · Bread wheat
Hodowla Roslin Smolice Sp.z o.o Grupa IHAR
Triticum aestivum L. · Bread wheat
Kärntner Saatbau reg.Gen.m.b.H.
x Triticosecale Wittm. ex A. Camus · Triticale
Elmar A. Weissmann
Triticum monococcum L. · Einkorn wheat
Laura Gazza^^^Norberto Pogna^^^Pierino Cacciatori
Triticum aestivum L. · Bread wheat
Lietuvos agrarinių ir miškų mokslų centras
Pisum sativum L. · Pea
SEMILLAS BATLLE, S.A.