Most “sick tree” problems can be traced back to underlying stresses that have reduced the tree's vigor, making it more vulnerable to diseases or insect pests.
Japanese beetle (Popillia japonica) is an insect exotic to the US, which has previously established throughout parts of the East Coast, Midwest and South. Although small numbers of beetles have been trapped at the Portland ...
A guide for how to collect and where to get a sample analyzed for plant diseases.
Useful information about Western Hemlock-Douglas Fir Forest, Prairie, Scrub-Shrub Wetlands, and Mixed Deciduous Forest/Steep Dry Slope.