We would like to have more information.  Please send us photos of the whole plant, affected foliage,  and buds so we can see what you are dealing with.

Marian

The images are of the most severely affected poppy.  The other plant has no buds and just a few leaves affected. But it too is starting to look saggy.

Unfortunately we cannot determine exactly which pathogen has caused this damage, though once symptomatic, control with fungicides would not be effective. The relatively cool, wet weather this past spring were probably ideal conditions for infection; it exacerbated other fungal disease outbreaks we have seen thus far. Since poppies die back naturally in hot weather, they will soon be going dormant and no treatment is recommended. For now, you can certainly trim off any blackened growth and dispose of it.

Miri