Grapevine powdery mildew
canopy structure and fruit support Flower and cluster symptoms Infection of flowers and young clusters during flowering Poor fruit set and increased flower [...] flowers, and grape clusters, causing yield losses, reduced fruit quality, and increased risk of bunch rot. Powdery mildew thrives under warm and humid c [...] Leaf curling, distortion, and brittleness as infection progresses Reduced photosynthetic activity and weakened vine vigor Shoot and tendril symptoms White