Powdery Mildew: Causes, Prevention, and Management Strategies
Powdery mildew, a common fungal disease, is affecting various plants, from trees to bedding plants. This article explores its causes, prevention, and management strategies.
Powdery mildew is a widespread issue, impacting nearly all plant types. Each plant species is typically targeted by a unique powdery mildew fungus. For instance, cannabis is susceptible to specific fungi that thrive in dense foliage and humid microclimates, unlike those affecting lilacs.
The disease favors moderate temperatures and humid conditions, but not wet ones. It tends to be more severe in shaded areas with poor airflow. To manage powdery mildew, increase air circulation and avoid excess fertilizer use. Overhead irrigation should be avoided as it can contribute to other diseases.
Good site selection based on the specific plant's needs is the best preventative measure. Fungicides are available but are mainly protectant, not curative. They should be applied before infection. Options include chlorothalonil products, biofungicides, sulfur products, and some oil sprays.
Powdery mildew is a prevalent issue affecting a wide range of plants. Understanding its causes and implementing preventative measures like good site selection and air circulation can help manage this fungal disease. While fungicides are available, they are most effective when applied prior to infection.
