PPO > Sudden Oak Death Research and Education Program > Sudden Oak Death > Information for Students > Student Projects 2011 > Inoculation of Noble fir seedlings with Phytophthora and Pythium spp.

Inoculation of Noble fir seedlings with Phytophthora and Pythium spp.

outside a brown garage with a white door is a midsize shore pine in a large pot and a collection of much smaller fir trees that seem to be in pots on the ground. a man holds a small tray of the baby trees while a smiling girl gives double thumbs up.

For her senior project, a student at Bellarmine High School, Tacoma, is testing several isolates of Phytophthora and Pythium spp. to determine whether they cause disease on Noble fir seedlings. Noble fir (Abies procera) is commonly grown as a Christmas tree in western Washington and some growers irrigate using local stream water. Some of the test organisms have been collected from streams in western WA in the 2011 stream monitoring program. Others are known pathogens of Noble fir and are included as standards or to obtain more information about their behavior on roots.

Test organisms will be selected from this list:

Sample #	Isolate #	Species	Origin
1	1106-BP1-L2A	Pythium undulatum*
2	1106-BP1-L4B	Phytophthora taxon “PGchlamydo”*
3	109-0045	Phytophthora cryptogea*
4	109-0038	Phytophthora gonapodyides*
5	1106-BP1-L3B	Phytophthora taxon “salixsoil”*
6	109-0049	Phytophthora cambivora
7	P720	Phytophthora cinnamomi
8	1105-BP1-L3A	Pythium sp. #1*
9	109-0030	Phytophthora citricola
10	109-0055	Phytophthora megasperma*
11	1112-BP2-L2B	Pythium anandrum*
12	1112-BP1-L2B	Phytophthora inundata*
13	1102-BP1-L5B	Pythium grandisporangium
14	1103-BP3-L4A	Phytophthora taxon “oaksoil”*

*Used in Trial 1

WSU Puyallup Research & Extension Center
2606 West Pioneer, Puyallup, WA, 98371-4998 USA
Last updated 9/24/2025

Last updated 9/22/2025