In 2016, Holden Forest & Gardens entered into an agreement with the USDA Forest Service to establish a research plot of “Lingering Ash” trees. Lingering Ash trees are identified as plants persisting and maintaining a healthy crown where as 98% of their ash counterparts have died from Emerald Ash Borer (EAB) infestations.
Charles Tubesing, Holden’s (now retired) Curator and gifted plant propagator, grafted over 1200 green and white ash to be planted at two sites, one being at Holden and the other site at The Dawes Arboretum in Newark, OH.
2021 brings a challenging season to prune for a strong central leader and to remove over extended (co-dominate) branches to reduce competition for apical dominance and conserve energy for regrowth.
Through genetic selection of trees that displayed tolerance and resistance to EAB, and possibly enhanced through breeding, ash trees may once again be viable choices for our landscapes. This is just one collaborative effort with that goal in mind.
If you are interested in learning more about Emerald Ash Borer follow this link from the Arbor Day Foundation: https://www.arborday.org/trees/health/pests/emerald-ash-borer.cfm
Collections Maintenance Supervisor