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 MOMONT RECHERCHE SARL, FR
Triticum aestivum L. · Bread wheat
KWS UK LTD
Triticum aestivum L. · Bread wheat
Bedoe Zoltan / Lang Laszlo / Szunics Laszlo / Veisz Otto / Vida Gyula / Karsai Ildiko / Szuecs Peter / Szunics Laszlone / Juhasz Angela
Pisum sativum L. · Pea
Hodowla Roslin Smolice Sp.z o.o Grupa IHAR
x Triticosecale Wittm. ex A. Camus · Triticale
Danko Hodowla Roslin Sp.z.o.o.
Pisum sativum L. · Pea
Hodowla Roslin Smolice Sp.z o.o Grupa IHAR
Avena sativa L. · Oat
SARL ADRIEN MOMONT ET FILS, FR
x Triticosecale Wittm. ex A. Camus · Triticale
ITTU GHEORGHESAULESCU NICOLAEITTU MARIANAMUSTATEA POMPILIU
Triticum aestivum L. · Bread wheat
Gabonatermes. Kut. KHT (HU)
Triticum aestivum L. · Bread wheat
Danko Hodowla Roslin Sp.z.o.o.
Secale cereale L. · Rye
Danko Hodowla Roslin Sp.z.o.o.
Secale cereale L. · Rye
Leida Kask 60%,Kaljo Kask 15%,Virve Küüts 10%,Ilme Tupits 10%,Vahur Kukk 5%
Triticum aestivum L. · Bread wheat
SECOBRA RECHERCHES S.A.S
Triticum aestivum L. · Bread wheat
APSOVSEMENTI S.P.A.
Triticum aestivum L. · Bread wheat
APSOVSEMENTI S.P.A.
Triticum aestivum L. · Bread wheat
Deutsche Saatveredelung AG^^^Delley Semences et Plantes (DSP) S.A.^^^Agroscope (Changins)
Hordeum vulgare L. · Barley
SAATZUCHT HANS SCHWEIGER & CO OHG
Triticum aestivum L. · Bread wheat
Prezemyslaw Matysik
Triticum aestivum L. · Bread wheat
SELGEN A.S
Hordeum vulgare L. · Barley
Nickerson International Research SNC (FR)
Hordeum vulgare L. · Barley
Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR
Triticum aestivum L. · Bread wheat
SELGEN A.S
Triticum durum Desf. · Durum wheat
Syngenta Participations AG
Triticum aestivum L. · Bread wheat
SARL ADRIEN MOMONT ET FILS, FR