Swiss needle cast (Phaeocryptopus gaeumannii) in Southern Plant Diagnostic Network

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Swiss needle cast (<em>Phaeocryptopus gaeumannii</em>) symptoms on Douglas-fir (<em>Pseudotsuga menziesii</em>)

USDA Forest Service - North Central Research Station , USDA Forest Service, Bugwood.org

Swiss needle cast (Phaeocryptopus gaeumannii) symptoms on Douglas-fir (Pseudotsuga menziesii)

symptoms of infestation

Petr Kapitola, Central Institute for Supervising and Testing in Agriculture, Bugwood.org

symptoms of infestation

Pseudothecia on underside of needles ranging from lightly infected (left) to heavily infected (right).

Susan K. Hagle, USDA Forest Service, Bugwood.org

Pseudothecia on underside of needles ranging from lightly infected (left) to heavily infected (right).

Close-up of pseudothecia on underside of needle.

Susan K. Hagle, USDA Forest Service, Bugwood.org

Close-up of pseudothecia on underside of needle.

Micrograph of needle cross section with pseudothecia emerging from stomata on underside.

Susan K. Hagle, USDA Forest Service, Bugwood.org

Micrograph of needle cross section with pseudothecia emerging from stomata on underside.

Necrotic lesions on needles 2 years old and older; dieback from the tip of needle. Nemecká, Slovakia

Andrej Kunca, National Forest Centre - Slovakia, Bugwood.org

Necrotic lesions on needles 2 years old and older; dieback from the tip of needle. Nemecká, Slovakia

fruiting bodies on needles

Petr Kapitola, Central Institute for Supervising and Testing in Agriculture, Bugwood.org

fruiting bodies on needles

symptoms of infestation

Petr Kapitola, Central Institute for Supervising and Testing in Agriculture, Bugwood.org

symptoms of infestation

infected foliage on left and healthy foliage on right

USDA Forest Service - Northern and Intermountain Region , USDA Forest Service, Bugwood.org

infected foliage on left and healthy foliage on right

symptomatic trees

Robert L. James, USDA Forest Service, Bugwood.org

symptomatic trees

Infected needle with pseudothecia emerging

Bruce Watt, University of Maine, Bugwood.org

Infected needle with pseudothecia emerging

Pseudothecia emerging from needle

Bruce Watt, University of Maine, Bugwood.org

Pseudothecia emerging from needle