| Image |
Descriptor |
Description |
Photographer |
| 2110002 |
Feature(s) |
Non-papillate sporangia of P. alni showing nested proliferation. |
Thomas Jung |
| 2110003 |
Feature(s) |
Bullate oogonium of P. alni (German variant) with oospore and amphigynous antheridium. |
Thomas Jung |
| 2110004 |
Feature(s) |
Smooth-walled oogonium of P. alni (Swedish variant) with oospore and amphigynous antheridium. |
Thomas Jung |
| 2110005 |
Symptoms |
Mature, riparian common alder (A. glutinosa) stand heavily impacted by root and collar rot caused by P. alni; surviving healthy alder in the center may indicate occurrence of resistance. |
Thomas Jung |
| 2110006 |
Symptoms |
Mature, riparian common alder (A. glutinosa) stand with high impact of Phytophthora root and collar rot. |
Thomas Jung |
| 2110007 |
Symptoms |
Alder plantation on former agricultural land; note infected grey alder (A. incana) with sparse, chlorotic and small-sized foliage. |
Thomas Jung |
| 2110008 |
Symptoms |
Grey alder (A. incana) with collar rot caused by P. alni; note the typical tarry spots at the outer bark and the tongue-shaped orange-brown necrosis of the inner bark. |
Thomas Jung |
| 2110009 |
Symptoms |
Common alder (A. glutinosa) in a non-flooded forest plantation with root and collar rot caused by P. alni. |
Thomas Jung |
| 2110010 |
Symptoms |
Mature common alder (A. glutinosa) with collar rot by P. alni (note tarry spots at the outer bark) growing in a forest stand; introduction of the pathogen via alder plantation in the neighbourhood established with infested planting stock. |
Thomas Jung |
| 2110011 |
Symptoms |
2-yr-old sprouts of of an 8-yr-old coppiced Alnus glutinosa showing wilting due to root and collar rot caused by P. alni. |
Thomas Jung |
| 2110012 |
Symptoms |
Root system of a 2-year-old nursery grown common alder (A. glutinosa) with necrotic lesions caused by P. alni. |
Thomas Jung |
| 5382598 |
Symptoms |
|
Andrej Kunca |
| 5382599 |
Symptoms |
|
Andrej Kunca |
| 5382600 |
Symptoms |
bark necrosis |
Andrej Kunca |
| 5382601 |
Symptoms |
|
Andrej Kunca |
| 5382602 |
Symptoms |
|
Andrej Kunca |
| 1277108 |
Symptoms |
River Creedy, England |
Howard Thresher |
| 2110001 |
Symptoms |
Mature common alder with collar rot caused by P. alni showing sparse, chlorotic and small-sized foliage. |
Thomas Jung |
