Horticulture/Leaf Spots
From Wikibooks, the open-content textbooks collection
| Leaf Spots | |
|---|---|
| Type: | Fungi and Bacteria |
Leaf Spots are circular lesions found on the leaves of plants, caused by either bacteria of fungi.
[edit] Symptoms and Signs
Initial infections are small, circular spots, usually with a differently colored zone on the outer edge. Severe cases cause distorted leaves or blight.
[edit] Life Cycle
Spores or bacteria overwinter on fallen leaves or buds. Growth is favored by moist conditions on the leaf surface.
[edit] Host Range
Most of the pathogens are quite selective.
[edit] Controls
- Cultural Controls: Prune or thin to allow good air circulation.
- Physical Removal: Clean up thoroughly in the autumn to reduce the amount of spores.
- Chemical Controls (synthetic): Neem Oil, Copper-based Sprays
