Off-colored needles usually older than the current year's needles.

Off-colored needles usually older than the current year's needles.

Close-up of several symptomatic needles. Note yellow flecking on needles is due to mite injury.

Needle showing fuzzy, black tufts rising from stomata which are not as well defined as with the needle cast disease caused by the fungus Rhizosphaera. Note yellow flecking on needles is due to mite injury.

Closer view of needle showing fuzzy, black tufts rising from stomata which are not as well defined as with the needle cast disease caused by the fungus Rhizosphaera. Note yellow flecking on needles is due to mite injury.

Closest view of needle showing fuzzy, black tufts rising from stomata which are not as well defined as with the needle cast disease caused by the fungus Rhizosphaera. Note yellow flecking on needles is due to mite injury.

View of several dark brown, spore-producing bodies ("conidiophores") and brown, multi-celled spores.

Closer view of several dark brown spore-producing bodies ("conidiophores") and brown, multi-celled spores.

View of two clumps of conidiophores and many brown, multi-celled spores.