Garden Pests and Diseases: Gray leaves on lupine leaves, 1 by BobLI

BobLI wrote:
Hello all,

I started several varieties of lupines indoors this year, and am starting to move them outside. About two weeks ago, I noticed gray patches forming along the edge of the leaves. The younger plants have already wilted out, while the more established plants have graying leaves, but are still holding on.

Can I remove the infected stems, and transplant these into the garden, or is it best to throw away all of the visibly infected plants.

Thanks for your help,
Bob