Ambrosia Beetles
(Scolytinae: Xyleborini)
Armillaria Root Rot
(Armillaria spp.)
Drought
Fireblight
(Erwinia amylovora)
Frost Crack
Herbicide Damage
Improper Mulching
Improper Planting
Improper Pruning
Leaf Scorch
Leafy Mistletoe
(Phoradendron tomentosum)
Lightning Damage
Mechanical Damage
Nutrient Deficiency
Overwatering
Phytophtora Root Rot
(Phytophtora spp.)
Powdery Mildew
(Oidium sp.)
Soil Compaction
Structural Root Rot
(Ganoderma sp.)
Twig Girdler
(Oncideres pustulatus)
Underwatering