Skip to content
agronom.cc cultivar database

Diseases

Powdery mildew

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.

Sources10

Breakdown by crop

Powdery Mildew of Soft Wheat 1 157 Apple Powdery Mildew 1 127 Powdery mildew of cucumber 1 031 Powdery mildew of rose 785 Powdery Mildew of Barley 758 Powdery mildew of melon 670 Tomato powdery mildew 351 Powdery mildew of zucchini 333 Powdery mildew of strawberry 281 Powdery mildew of pea 268 Powdery mildew of triticale 241 Powdery mildew of lettuce 231 Powdery mildew — sugar beet 186 Powdery mildew of pepper 185 Gooseberry powdery mildew 176 Powdery mildew of oats 176 Apple powdery mildew 153 Powdery mildew — durum wheat 151 Powdery Mildew of Black Currant 143 Grape Powdery Mildew 110 Peach Powdery Mildew 81 Powdery mildew of rye 76 Powdery Mildew of Bigleaf Hydrangea 73 Verbena powdery mildew 69

Found in these crops

Bread wheat 1 186 Apple 1 130 Cucumber 1 080 Grapevine 980 Rose 785 Barley 762 Melon 681 Common grape vine 512 Tomato 361 Field pumpkin 335 Garden strawberry 280 Pea 279

Varieties that feature this in their description

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.

LG Keramik

Active

Triticum aestivum L. · Bread wheat

Limagrain Europe, FR

AT BE HU LT PL SK +1
15 records

Hanka

Active

Hordeum vulgare L. · Barley

Saatzucht Hadmersleben Gmbh (DE)

AT DE DK EE FR LT +3
19 records

Marnie

Active

Hordeum vulgare L. · Barley

Saatzucht Josef Breun GdbR (DE)

AT DE DK FR HR HU +2
16 records

Temuco

Active

x Triticosecale Wittm. ex A. Camus · Triticale

Lantmannen SW Seed BV (NL)

CZ DE EE FI FR LT +2
18 records

Remiko

Active

x Triticosecale Wittm. ex A. Camus · Triticale

Ewa Czerwinska

CZ DE EE FR LT LV +2
15 records

LG Allegro

Active

Hordeum vulgare L. · Barley

Limagrain Nederland B.V.

AT CZ DE FR NL PL +2
17 records

Baikal

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Maribo Seed International ApS, DK

FR GR HR HU NL PL +1
12 records

Alexis

Active

Hordeum vulgare L. · Barley

ULRICH and JOSEF BREUN

DE DK ES FR HR IE +2
18 records

KWS Higgins

Active

Hordeum vulgare L. · Barley

KWS Lochow

AT CZ DE FI LT LU +2
17 records

Sandra

Active

Hordeum vulgare L. · Barley

SECOBRA RECHERCHES S.A.S

AT CZ DE DK ES FR +1
19 records

Meltan

Protection expired

Hordeum vulgare L. · Barley

W WEIBULL

AT DE DK EE ES FR +1
21 records

Nevada

Application submitted

Hordeum vulgare L. · Barley

SECOBRA RECHERCHES S.A.S

DE DK ES FR IE SE +1
21 records

Prima

Active

Malus domestica (Suckow) Borkh. · Apple

The State University of New Jersey - Rutgers (US)

CZ ES FR HU LT NL +1
18 records

Rotax

Active

Triticum aestivum L. · Bread wheat

Strube Research GmbH & Co. KG, D- 38387 Sollingen

DK EE LT LV PL SE +1
13 records

Meikrotal

Active

Rosa L. · Rose

SNC Meilland et Cie

DE DK ES FR IT NL +1
11 records

LG Tosca

Active

Hordeum vulgare L. · Barley

LIMAGRAIN EUROPE

CZ DE FR NL PL SK +1
15 records

Lexy

Active

Hordeum vulgare L. · Barley

SAATZUCHT JOSEF BREUN GMBH and CO.KG

DE EE FI FR LT PL +1
22 records

Dublet

Active

x Triticosecale Wittm. ex A. Camus · Triticale

Danko Hodowla Roslin Sp z.o.o. (PL)

CZ DE FR LT LU MT +1
16 records

Dinaro

Active

x Triticosecale Wittm. ex A. Camus · Triticale

DANKO HODOWLA| "DANKO" Hodowla Roslin Sp. z o.o.

CZ DE DK LT NL PL +1
16 records

Zhana

Active

Hordeum vulgare L. · Barley

Secobra Saatzucht

AT CZ DK SI SK UA
17 records

Regal

Active

Cucumis sativus L. · Cucumber

HM.CLAUSE

CZ HU LT NL PL SI
12 records

Maypole

Active

Malus Mill. · Apple

Tobutt, Kenneth R.|Kent, England

DE DK IT NL SE SK
12 records

Meibonrib

Active

Rosa L. · Rose

Meilland, Alain A.|Antibes, France

DE DK FR IT NL PL
12 records

KWS Dolaro

Active

Secale cereale L. · Rye

Peer Wilde^^^Brigitta Schmiedchen^^^Jutta Menzel

AT DE DK EE PL UA
14 records

Jump to page 20 72 110 145 217 289 361 434