Mycosphaerella and Dothistroma
Brown spot - Mycosphaerella dearnessii
Longleaf pine in the grass stage infected with brown spot.
Lesions caused by brown spot on long leaf pine needles.
Acervuli or conidial stromata being produced on needle lesion. Asexual spores are produced in these structures.
Dothistroma pini ( Mycosphaerella pini) - on Austrian and Ponderosa pine
Dothistroma needle disease on ponderosa pine.
Asexual spores are produced in an acervulus.