Armillaria Root Rot
(Armillaria spp.)
Drought
Frost Crack
Herbicide Damage
Hypoxylon Canker
(Hypoxylon tinctor)
Improper Mulching
Improper Planting
Improper Pruning
Leaf Scorch
Leafy Mistletoe
(Phoradendron tomentosum)
Lightning Damage
Mechanical Damage
Nutrient Deficiency
Overwatering
Powdery Mildew
(Oidium sp.)
Soil Compaction
Structural Root Rot
(Ganoderma sp.)
Underwatering