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.
Bottle gourd
Lagenaria siceraria
highly susceptibleChayote
Sechium edule
highly susceptibleKiwano
Cucumis metuliferus
highly susceptibleSponge gourd
Luffa aegyptiaca
highly susceptibleWax gourd
Benincasa hispida
highly susceptibleCommon Mullein
Verbascum thapsus
moderately susceptibleField maple
Acer campestre
moderately susceptibleFragrant Violet
Viola odorata
moderately susceptibleHorse chestnut
Aesculus hippocastanum
moderately susceptibleJapanese ornamental cherry
Prunus serrulata
moderately susceptibleNorway maple
Acer platanoides
moderately susceptibleFeigenblattkürbis
Cucurbita ficifolia
slightly susceptibleApple
Malus domestica
Courgette
Cucurbita pepo
Cucumber
Cucumis sativus
Pumpkin
Cucurbita maxima
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