Mycosphaerella and Dothistroma
Brown spot - Mycosphaerella dearnessii
Longleaf pine in the grass stage infected with brown spot.
Each spot on this longleaf pine is from a separate infection.
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 pine
Dothistroma needle disease on pine.
Lesions on nedles cause by Dothistroma.
Asexual spores are produced from an acervulus (dark fruiting bodies in photo pushing through the needle epidermis).