White Powder On Blueberry Stems
White Powder On Blueberry Stems. To control powdery mildew on plants, mix together: Sphaerotheca species on berries and stone fruits;
Powdery mildew or other leaf spotting pathogens. White powder on leaves & stem. Fortunately, only a few of the diseases that occur on highbush blueberry in this region cause significant losses when left unchecked.