A design for gardens near streamsides with steeper banks and dryer soils.
A design for gardens near streamsides with gradually sloped banks and wet soils.
Humans help spread the disease when they transport infected plants, plant parts or infested soil.
A design for gardens near streamsides with average sloped banks and mixed wet and dry soils.
Excessive summer irrigation of oak and madrone trees may promote fungal diseases such as the oak root fungus (aka armillaria root disease) and crown rot.
Browning or dieback is usually caused by weather-related stress, sometimes in combination with pests and diseases.