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Plant NameTypeDescription 
Sycamore anthracnoseSycamoreDiseaseSycamore anthracnose is a fungal disease affecting buds, leaves, and shoots. Young leaves appear brown and crinkled, with small to large dead areas often occurring along the main vein or on leaf margins. Infected leaves often drop from the tree, sometimes resulting in severe and repeated defoliation. Twigs and branches can develop infections as well, causing twig dieback. Regrowth at the base of killed twigs often results in a witches' broom symptom. The disease is favored by wet weather in the spring, which spreads infection from twigs to emerging leaves. California sycamore (Platanus racemosa) and American sycamore (P. occidentalis) are particularly susceptible.
AphidsSycamoreInsectAphids are soft-bodied insects that typically feed on leaves and succulent stems. They may vary in color from pale green or reddish to dark or black. Aphids are usually less than 1/8" in length. Aphid feeding is often accompanied by production of honeydew, a sweet, sticky substance. Honeydew can develop a dark growth of black sooty mold and may attract ants. White cast skins shed by aphids are often found on leaves, as well.