Powdery mildew in hemp
Powdery mildew in hemp is a common fungal disease that can affect the health and yield of hemp plants. It’s caused by various species of fungi, with Podosphaera xanthii and Golovinomyces cichoracearum being common culprits.
Powdery mildew typically appears as white or grayish, powdery spots or patches on the leaves, stems, and even flowers of hemp plants. Infected leaves may curl, become distorted, or die prematurely. As the disease progresses, the powdery spots can merge, covering larger areas of the plant.
Powdery mildew thrives in conditions of moderate temperatures and high humidity. Poor air circulation and high plant density can create an environment conducive to powdery mildew development. It can affect both indoor and outdoor hemp crops.
To prevent powdery mildew, it’s important, first of all, to maintain proper spacing between plants to ensure good airflow and to control humidity levels in indoor grow operations using dehumidifiers. Additionally, ensuring proper lighting and ventilation in indoor settings is important. Pruning and removing infected plant parts can help prevent the spread of the disease.
