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.
Weeds are always a difficult problem in blueberry production! They start to show up shortly after transplanting, and tend to become more problematic as time goes on. There are, however, strategies that help to control weeds in blueberry. This article will discuss some thoughts about weed control in blueberry, and some of the strengths, and weaknesses, of currently registered herbicides.