This presentation by Dr. Ruark covers some of the current “state-of-the-art” tools and techniques used by urban foresters in determining nutrition sampling, risk assessment, and lab diagnostics for plant pathogens. Plus, a compiled list of mobile device apps currently used by diagnosticians. Listen to the Science of Arboriculture podcast and then take the accompanying CEU quiz to check your knowledge. (A, U, T, M, Bp)