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;
![What is that white powder on blueberries? The Boston Globe](https://i2.wp.com/i2.wp.com/cache.boston.com/resize/bonzai-fba/Globe_Photo/2010/02/21/1266813183_6984/539w.jpg)
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.