Armillaria Root Rot
(Armillaria spp.)
Structural Root Rot
(Ganoderma sp.)
Frost Crack
Lightning Damage
Soil Compaction
Improper Pruning
Mechanical Damage
Improper Mulching
Phytophthora Root Rot
(Phytophthora spp.)
Ambrosia Beetles
(Scolytinae: Xyleborini)