georgia plant soft thorns and black spots

Branches show flagging, wilting foliage yellows or brownsġ1. Branches show dieback cankers on trunk tree in declineġ0.

Branches or trunk galled or swollen (Crown Gall)ġ0. Black, sooty or powdery growth typically on upper leaf surface (Sooty Mold)ġ0.

Upper or lower surfaces of leaf with white, powdery growth pale green spots may also be present when growth is absent (Powdery Mildew)ħ. Small, yellow pin-point spots on upper leaf surface brown, hair-like projections on leaf underside (Fusiform Rust)ħ. Light green, puckered areas in the spring areas become necrotic in fall (Oak Leaf Blister)Ħ. 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 wilts (Oak Wilt)Ħ. Scorching from leaf tip toward petiole yellow to red line often precedes advancing scorch symptom on leaf (Bacterial Leaf Scorch)ĥ. Sprawling spots seen in the fall often with yellow halo (Tubakia Leaf Spot)ĥ. Spots seen in the spring leaves are tattered or distorted twigs killed (Anthracnose)Ĥ. Marginal, tip or interveinal leaf scorching affectes all leaves on a branchĤ. Tan, crusty spots associated with leaf puckering seen in the fall (Oak Leaf Blister)ģ. 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.

Georgia plant soft thorns and black spots