Unfortunately, we see this needle cast disease frequently in Delaware. See this fact sheet for management options: https://extension.umn.edu/plant-diseases/rhizosphaera-needle-cast It may be necessary to treat for this disease annually in the spring.

Unfortunately, this is one if the diseases that may need to be treated for annually. If the last time this was treated in 2017 or 2018, then it's a good idea to treat again. The dead needles on the ground and infected needles still attached to branches contain the fungal spores that reinfect healthy needles in the spring. You can also mulch under the tree, prune out infected branches, and other cultural practices outlined here, to prevent reinfection: https://extension.umn.edu/plant-diseases/rhizosphaera-needle-cast