USDA Forest Service - North Central Research Station , USDA Forest Service, Bugwood.org
Swiss needle cast (Phaeocryptopus gaeumannii) symptoms on Douglas-fir (Pseudotsuga menziesii)
Petr Kapitola, Central Institute for Supervising and Testing in Agriculture, Bugwood.org
symptoms of infestation
Susan K. Hagle, USDA Forest Service, Bugwood.org
Pseudothecia on underside of needles ranging from lightly infected (left) to heavily infected (right).
Susan K. Hagle, USDA Forest Service, Bugwood.org
Close-up of pseudothecia on underside of needle.
Susan K. Hagle, USDA Forest Service, Bugwood.org
Micrograph of needle cross section with pseudothecia emerging from stomata on underside.
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
Petr Kapitola, Central Institute for Supervising and Testing in Agriculture, Bugwood.org
fruiting bodies on needles
Petr Kapitola, Central Institute for Supervising and Testing in Agriculture, Bugwood.org
symptoms of infestation
USDA Forest Service - Northern and Intermountain Region , USDA Forest Service, Bugwood.org
infected foliage on left and healthy foliage on right
Robert L. James, USDA Forest Service, Bugwood.org
symptomatic trees
Bruce Watt, University of Maine, Bugwood.org
Infected needle with pseudothecia emerging
Bruce Watt, University of Maine, Bugwood.org
Pseudothecia emerging from needle
Swiss needle cast (Phaeocryptopus gaeumannii) symptoms on Douglas-fir (Pseudotsuga menziesii)
symptoms of infestation
Pseudothecia on underside of needles ranging from lightly infected (left) to heavily infected (right).
Close-up of pseudothecia on underside of needle.
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
fruiting bodies on needles
symptoms of infestation
infected foliage on left and healthy foliage on right
symptomatic trees
Infected needle with pseudothecia emerging
Pseudothecia emerging from needle