On the long-term monitoring sites, volunteers chose an extra plant species to be used as bait. Two samples from each plant were cultured and identified:
| Baiting period | 1001 Clarks Creek Downstream | 1002 Anderson Creek | 1003 Evans Creek | 1006 Dogfish Creek |
|
1
| Camellia P. gonapodyides (1), unknown (1) | Sword fern (Polystichum munitum) P. gonapodyides (1), unknown (1) | Himalayan blackberry (Rubus armeniacus) P. gonapodyides (2) | Cherry laurel (Prunus laurocerasus) no growth |
|
2
| Gold dust plant (Aucuba japonica ‘Variegata’) Pythium litorale or Py. sterilum (2) | Sword fern (Polystichum munitum) P. gonapodyides (1), unknown (1) | Japanese knotweed (Polygonum cuspidatum) P. gonapodyides (2) | Viburnum davidii unknown (2) |
|
3
| Strawberry tree (Arbutus unedo) Pythium sp. or Py. undulatum (1), unknown (1) | Sword fern (Polystichum munitum) Pythium sp. or Py. undulatum (1), unknown (1) | Cherry laurel (Prunus laurocerasus) fungus* (Ophiocordyceps crassispora, Cylindrocarpon obtusisporum, Nectria) (1), unknown (1) | Common ivy (Hedera helix) P. gonapodyides (2), unknown (1) |
|
4
| Dwarf cherry laurel (Prunus laurocerasus) P. gonapodyides (2), unknown (2) | Dandelion (Taraxacum officinale), unknown (2) | Pacific madrone (Arbutus menziesii) unknown (2) | Rhododendron spp. P. gonapodyides (1), unknown (1) |
|
5
| unknown (2) | Horsetail (Equisetum spp.) unknown (2) | Evergreen huckleberry (Vaccinium ovatum) P. gonapodyides (1), unknown (2) | English laurel (Prunus laurocerasus) |
|
6
| Red tip Photinia (Photinea x fraseri) P. gonapodyides (2) | Red alder (Alnus rubra) P. gonapodyides (1), unknown (2) | Kousa dogwood (Cornus kousa) no growth | Common ivy (Hedera helix) unknown (2) |
*probably endophytic in host leaf
WSU Puyallup Research & Extension Center
2606 West Pioneer, Puyallup, WA, 98371-4998 USA
Last updated 9/25/2025