Ongoing surveys for Armillaria in California: DNA-based identification, bioclimatic modeling, and information for managing Armillaria root disease under changing environments

Abstract

Armillaria root disease (ARD) is among the largest causes of mortality and lost productivity in forests of the western USA (Lockman and Kearns 2016, Kim et al. 2022). In some forest areas of western North America, growth/volume losses between 16-55% have been attributed to ARD (Filip and Goheen 1984; Cruickshank 2011). Damage from ARD is expected to increase under climate change and extreme weather events (e.g., drought, temperature), because host tree stress can predispose trees to ARD (Klopfenstein et al 2009; Kim et al. 2021; Murray and Leslie 2021). Furthermore, ARD may predispose trees to beetle attack or other pathogenic fungi (e.g., Kulhavy et al. 1984, Tkacz and Schmitz 1986, Williams et al. 1986).

Citation

Hanna, John W.; Kim, Mee-Sook; Bennett, Patrick I.; Hawkins, Ashley E.; Lee, Chris A.; Corella, Kim; Barnes, Charles W.; Robinson, Wallis L.; Kroese, Duncan R.; Woodruff, William C.; Cannon, Phil G.; Klopfenstein, Ned B. 2024. Ongoing surveys for Armillaria in California: DNA-based identification, bioclimatic modeling, and information for managing Armillaria root disease under changing environments. In: Brooks, Rachel K., compiler. Proceedings of the 68th Western International Forest Disease Work Conference; 5-9 June 2023; Rohnert Park, CA. Online: https://www.wifdwc.org. p. 168-174.