What is the main host plant for Erisiphe necator?

Erisiphe necator is the causal agent of powdery mildew primarily affecting grapevines. This fungus thrives in humid conditions and is particularly notorious in vineyards, where it can cause significant damage to the leaves, stems, and fruit of grapes. As the main host plant, grapes provide the specific environment that promotes the life cycle of Erisiphe necator, making effective management of powdery mildew essential for grape production. Other plants like citrus, tomatoes, and olives are not primary hosts for this particular fungus, hence they do not typically exhibit the same susceptibility or damage from Erisiphe necator. Understanding the specific host plant helps in implementing targeted control measures and managing the disease effectively.