Horticulture/Leaf Spots

Leaf Spots Fungi and Bacteria Leaf Spots are circular lesions found on the leaves of plants, caused by either bacteria of fungi. 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. Life Cycle Spores or bacteria overwinter on fallen leaves or buds. Growth is favored by moist conditions on the leaf surface. Host Range Most of the pathogens are quite selective. Controls Prune or thin to allow good air circulation. Clean up thoroughly in the autumn to reduce the amount of spores. ../Neem Oil/, ../Copper-based Sprays/