Downy Mildew
Identification: Yellow or white patches on upper leaf surfaces with greyish mold underneath.
Symptoms: Discolored, curled leaves and stunted plant growth.
Control:
Copper Fungicide: Apply copper-based fungicides to affected plants.
Airflow: Improve air circulation and avoid overhead watering.
Destroy Infected Plants: Remove and destroy affected plants to prevent spread.
Resistant Varieties: Plant mildew-resistant varieties where possible.