Grenadine Dream
ActivePhlox paniculata L. · Garden phlox
Verschoor Jan|Haarlem, NL
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.
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
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.
Harxampton
Protection expiredRosa L. · Rose
Phillp Harkness|Robert Harkness
Hoogi021
ActivePhysocarpus opulifolius (L.) Maxim. · Ninebark
Mark Sebastiaan Hoogenraad
Hoho 1
ActiveBerberis thunbergii DC. · Japanese barberry
Ralph Matheus Hoof, Mark Sebastiaan Hoogenraad
Jethro Tull
ActiveCoreopsis auriculata x Coreopsis lanceolata
Saul Robert Mark|Atlanta, GA, US
Fondant Fancy
ActivePhlox paniculata L. · Garden phlox
Verschoor Jan|Haarlem, NL
Jade Frost
ActiveEryngium planum L. · Blue eryngo
James Andrew Cave, Megan Kathryn Cave
Fisimp Salm
TerminatedImpatiens New Guinea Group · New Guinea Impatiens
Hofmann, Birgit Christa
Inov42
ActiveLonicera L. · Honeysuckle
Kapusta Veronique|Beaucouze, FR
Inneuphhel
ActiveEuphorbia L. · Spurge
Innovaplant Zierpflanzen GmbH & Co KG
IFG Seven
ActiveVitis vinifera L. · Common grape vine
David W.Cain
Horwack
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Meinl Katrin
Gallery La Tour
ActiveDahlia Cav. · Dahlia
Verwer-Dahlia's B.V.
Esm Kata
ActiveRosa L. · Rose
Hooijman Aloysius A. J.
Frisal
ActiveTriticum aestivum L. · Bread wheat
Aldo Fossati Agroscope / F. Weilenmann Agroscope / F.X. Paccaud Agroscope / G. Popow Agroscope / Hans Winzeler Agroscope / P. Fried Agroscope / W. Saurer Agroscope
Flaminia
ActiveFragaria x ananassa Duchesne ex Rozier · Garden strawberry
Michelangelo Leis^^^Alessio Martinelli
Haraztec
Protection expiredRosa L. · Rose
Phillp Harkness|Robert Harkness
Finette
Application submittedFragaria x ananassa Duchesne ex Rozier · Garden strawberry
Flevo Berry Holding B.V.
Golden Orange
ActiveMalus domestica (Suckow) Borkh. · Apple
Antonio Bergamini
Geus1713
ActiveRosa L. · Rose
Select Breeding B.V.
ET RDB 401
ActiveRudbeckia L. · Coneflower
Eternal Plant Boijl B.V.
Desert Surprise
ActiveKalanchoe humilis Britten
Knud Jepsen A/S
Frenzy
ActiveGaillardia x grandiflora hort. ex Van Houtte · Blanket flower
John A. Dixon
Freiston
ActiveTriticum aestivum L. · Bread wheat
ELSOMS WHEAT