![Bacterial leaf scorch on red oak. Photo credit: Nancy Gregory](http://s3.amazonaws.com/udextension/wp-content/uploads/sites/6/2015/08/Bacterial-leaf-scorch-oak.jpg)
Bacterial leaf scorch on red oak. Photo credit: Nancy Gregory
![Juniper scale adults. Photo credit: US National Collection of Scale Insects Photographs Archive, USDAARS, bugwood.org](http://s3.amazonaws.com/udextension/wp-content/uploads/sites/6/2015/08/juniper-scale-adults.jpg)
Juniper scale adults. Photo credit: US National Collection of Scale Insects Photographs Archive, USDAARS, bugwood.org
![Downy mildew on Rudbeckia lower leaf surface. Photo credit: Nancy Gregory](http://s3.amazonaws.com/udextension/wp-content/uploads/sites/6/2015/08/RudbeckDowny.jpg)
Downy mildew on Rudbeckia lower leaf surface. Photo credit: Nancy Gregory
![White prunicola scale. Photo credit: Brian Kunkel](http://s3.amazonaws.com/udextension/wp-content/uploads/sites/6/2015/08/White-prunicola-scale.jpg)
White prunicola scale. Photo credit: Brian Kunkel
![Japanese maple scale. Photo credit: Brian Kunkel](http://s3.amazonaws.com/udextension/wp-content/uploads/sites/6/2015/08/Japanese-Maple-scale.jpg)
Japanese maple scale. Photo credit: Brian Kunkel