Diagnosing Apple Tree Fruit and Leaf Problems

A newly inherited apple tree bears small, poor-quality fruit and unhealthy leaves. The previous owner blamed excess rain. While weather plays a role, several common issues could be at play.

Possible Causes

• Apple scab: Olive-green spots on leaves/fruit, worse in wet springs.
• Cedar-apple rust: Orange spots on leaves, requires nearby junipers.
• Bitter rot: Sunken brown lesions on fruit.
• Insect damage: Codling moth, plum curculio, or birds.

Diagnostic Steps

1. Cut open affected fruit—look for worms, frass, or internal rot.
2. Compare leaf symptoms to "Google Images" for the diseases above.
3. Submit a sample to your local extension office for lab diagnosis.

Management

If the tree is large, full-coverage spraying is impractical. Focus on:

• Sanitation: Remove fallen fruit/leaves promptly.
• Soil test: Correct nutrient deficiencies.
• Pruning: Improve airflow and light penetration.
• Resistant varieties: Consider top-grafting or replanting long-term.