Stressed trees show dieback
Browning or dieback is usually caused by weather-related stress, sometimes in combination with pests and diseases.
Blueberry bacterial and fungal diseases
Pacific Northwest blueberry growers must identify and control a number of bacterial and fungal diseases in order to ensure the highest yields. Fortunately, only a few of the diseases that occur on highbush blueberry in this region cause significant losses when left unchecked.