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.

Colorburst Orange

Withdrawn

Hybrids between Echinacea purpurea (L.) Moench and Echinacea paradoxa (Norton) Britton

HARINI KORLIPARA

1 record

BOZVAZ019

Terminated

Rosa L. · Rose

Pheno Geno Roses B.V.

1 record

Baldadendre

Active

Dahlia Cav. · Dahlia

JEROEN GITZELS

1 record

Conga Saron

Terminated

Rosa L. · Rose

Saron Breeding B.V.

1 record

Bocopola

Active

Aster ageratoides Turcz.

Boot & Co. Boomkwekerijen B.V.

1 record

Blush Pixie

Active

Rosa L. · Rose

Pheno Geno Rose D.O.O.

1 record

Blue Lagoon

Terminated

Verbascum luridiflorum Hub.-Mor.

BRANDED GARDEN PRODUCTS

1 record

Blopip

Withdrawn

Helenium autumnale L. · Common sneezeweed

JACKSON S.

1 record

Chloé

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

Invenio

1 record

Barphlearpideye

Terminated

Phlox paniculata L. · Garden phlox

Bartels Stek B.V.

1 record

Balskywac

Application submitted

Veronica L. · Speedwell

Jessica D. Janes^^^Laura M. Lara

1 record

Balroxleam

Withdrawn

Digitalis x fulva Lindl.

Paul Gehrke

1 record

Bareleven

Terminated

Phlox L. · Phlox

Bartels Breeding B.V

1 record

Briava

Terminated

Rosa L. · Rose

PETER BRILL

1 record

Boulevard

Terminated

Chrysanthemum L. · Chrysanthemum

Cleangro Ltd

1 record

BALAZDELIM

Withdrawn

Verbena L. · Vervain

SCOTT C TREES

1 record

Balfireitim

Active

Verbena L. · Vervain

Laura L. Masor

1 record

Ample Surprise

Terminated

Acer longipes x Acer platanoides

Petrus Cornelis de Jong

1 record

Bokrawim

Terminated

Rosa L. · Rose

De Ruiter Intellectual Property B.V.

1 record

Bravor

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

Flevo Plant Holding B.V.

1 record

Astilbe Eliblo

Protection expired

Astilbe Buch.-Ham. ex D. Don · False goat's beard

Blooms of Bressingham Ltd

1 record

Bocopollu

Active

Aster ageratoides Turcz.

Boot & Co. Boomkwekerijen B.V.

1 record

Atomic Violet Ray

Terminated

Veronica L. · Speedwell

A. VERSCHOOR HORTICULTURE IMPORT-EXPORT B.V

1 record

Barnine

Terminated

Phlox L. · Phlox

Bartels Breeding B.V

1 record

Jump to page 72 145 217 289 311 361 401 421 434