True powdery mildew
Erysiphales
This description was machine-translated.
How to spot it
You will see the true powdery mildew covering the upper leaf surfaces with a milky‑white coating that can be easily wiped off, unlike the false powdery mildew, which comes from below. It loves dry warm days with cool nights and especially weakens pumpkin family plants, causing the leaves to yellow and die.
Prevention
Choose powdery mildew‑tolerant varieties and water evenly so your plants do not experience drought stress. Keep air circulation and remove the first infected leaves. A spray with diluted skim milk or baking soda solution can slow the infestation.
Affected plants
These plants in our database are especially susceptible.
Chayote
Sechium edule
highly susceptibleFlaschenkürbis
Lagenaria siceraria
highly susceptibleKiwano
Cucumis metuliferus
highly susceptibleSchwammgurke
Luffa aegyptiaca
highly susceptibleWachskürbis
Benincasa hispida
highly susceptibleDuftveilchen
Viola odorata
moderately susceptibleFeldahorn
Acer campestre
moderately susceptibleJapanische Zierkirsche
Prunus serrulata
moderately susceptibleKönigskerze
Verbascum thapsus
moderately susceptibleRosskastanie
Aesculus hippocastanum
moderately susceptibleSpitzahorn
Acer platanoides
moderately susceptibleFeigenblattkürbis
Cucurbita ficifolia
slightly susceptibleApfel
Malus domestica
Gurke
Cucumis sativus
Kürbis
Cucurbita maxima
Zucchini
Cucurbita pepo
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