Bay Leaf Plant Leaf Spots: Identifying and Managing Shot Hole Disease

Symptoms on Bay Laurel in Zambia

A bay leaf plant in Zambia shows small brown spots on older leaves, with lighter brown edges. The plant is exotic to the region, making identification challenging.

Likely Cause: Shot Hole Disease

The symptoms match shot hole disease, a fungal infection that creates purplish to reddish leaf spots. These spots eventually drop out, leaving circular holes. Mild, wet summer weather promotes the disease.

Management Strategies

• No Chemical Cure: Currently, no fungicides are registered for shot hole disease on bay laurel.
• Cultural Care: Apply a balanced fertilizer to boost plant vigor.
• Organic Option: Try 100% pure neem oil (e.g., Dyna-Gro), which acts as both a fungicide and miticide. It's organic and helps suppress various pests.

Prevention Tips

Improve air circulation, avoid overhead watering, and remove fallen infected leaves to reduce fungal spores.