Powdery mold doesn’t discriminate as to which vegetation it’ll infest and which it won’t. However, powdery mildew does seem to form easier on some vegetation than others. Plants similar to cantaloupe, cucumbers, melons, peas, pumpkins, and squash appear to contract powdery mildew easier as a result of they grow into bigger crops with bigger leaves.
The leaves can from time to time block airflow and can also be difficult to create much area between the vegetation. If you set all of those characteristics together, you create a breeding ground for powdery mold.
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|Wheat, barley and other cereals||Blumeria graminis f. sp. tritici, causes powdery mildew of wheat, whereas f. sp. hordei causes powdery mildew of barley.|
|Legumes||Legumes, such as soybeans, are affected by Microsphaera diffusa.|
|Grape||Erysiphe necator (or Uncinula necator) causes powdery mildew of grapes.|
|Onions||The fungus causing powdery mildew of onions is Leveillula taurica (also known by its anamorph name, Oidiopsis taurica). It also infects the artichoke.|
|Apples and pears||Podosphaera leucotricha is a fungus that can cause powdery mildew of apples and pears.|
|Gourds and melons||Multiple species of fungus can cause powdery mildew of cucurbits: cucumbers, squashes (including pumpkins), luffas, melons, and watermelons.|
|Lilacs||Microsphaera syringae is a fungus that can cause powdery mildew in lilac.|
|Strawberries||Podosphaera aphanis is the cause of powdery mildew in strawberries and other Rosaceae like Geum rivale (the water avens)|
|Tree leaves||Sawadaea tulasnei is a fungus that causes powdery mildew on tree leaves. This fungus attacks the leaves of the Acer platanoides (Norway maple) in North America, Great Britain, and Ireland, Acer palmatum (also known as the Japanese maple or smooth Japanese maple).|
|Oregon grape||Erysiphe berberidis is a fungus that causes powdery mildew on Oregon grape leaves.|
|Arabidopsis||Golovinomyces orontii causes powdery mildew on Arabidopsis (rockcress) leaves|