Mycosphaerella and Dothistroma

Needle Diseases

Brown spot - Mycosphaerella dearnessii

16161611.jpg (22171 bytes)

Longleaf pine in the grass stage infected with brown spot.

16161617.jpg (29920 bytes)

Lesions caused by brown spot on long leaf pine needles.

16161606.jpg (27611 bytes)

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

16161609.jpg (32624 bytes)

Dothistroma needle disease on ponderosa pine.

16161610.jpg (26938 bytes)

Asexual spores are produced in an acervulus.