WSU Puyallup Education
Questions to determine the need to submit a homeowner sample in Washington State
1) The plant displays leaf blight, defoliation, or stem die back symptoms similar to those shown in the photographs.
a. Yes- go to 2
b. No- Sample can be discarded
2) What plant is affected?
a. The plant is a camellia, rhododendron, pieris, kalmia, viburnum, or lilac purchased since 2002- Submit sample
b. The plant is growing next to a camellia, rhododendron, pieris, kalmia, viburnum, or lilac purchased since 2002- go to 3
c. None of the above- unlikely P. ramorum. Sample can be discarded.
3) Is the plant a known host of Phytophthora ramorum?
a. Yes- Submit sample
b. Sample can be discarded