Small, yellow pin-point spots on upper leaf surface brown, hair-like projections on leaf undersideħ.
Light green, puckered areas in the spring areas become necrotic in fallĦ. Leaves and/or twigs with mycelium on upper or lower surfaceĦ. Yellow, brown or dull green scorching from leaf tip toward petiole or beginning at leaf petiole affected branch often wiltsĦ. Scorching from leaf tip toward petiole yellow to red line often precedes advancing scorch symptom on leafĥ. Sprawling spots seen in the fall often with yellow haloĥ. Spots seen in the spring leaves are tattered or distorted twigs killedĤ. Marginal, tip or interveinal leaf scorching affectes all leaves on a branchĤ. Tan, crusty spots associated with leaf puckering seen in the fallģ. Tiny to sprawling brown or gray spots along leaf margins and/or veins no leaf blistering or puckering associated with spotsģ.
Necrosis absent leaves affected but remain greenģ. Leaf necrosis (dead spots or blights) presentĢ. The following key will help you identify common diseases of oak trees. from "Florida Tomato Scouting Guide", University of Florida. In order to use these keys, you must first decide or make an educated guess as to whether the damage or symptom is caused by an INSECT or DISEASE." The choices describe symptoms or morphological characteristics thought to be most distinctive of a particular insect or disease. It is based on a series of questions that have as answers choices between two or more alternative pathways. "'What is an "identification key?' It is a road map of sorts that aids in the identification of a disease or an insect specimen observed in the field.
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