Advanced BLD infection results in extensive foliar damage and reduced leaf area, severely limiting the tree’s ability to photosynthesize and store energy.
and soil compaction for years. Howev- er, BLD uniquely leads to carbohydrate starvation, which makes it a particular- ly fatal condition. Living in the Northeast, I personally perceive BLD as a fast-moving, acute is- sue rather than a chronic one, as seen in the Midwest. To this, Borden agreed, remarking that he, too, does not fully understand why BLD appears to prog- ress more rapidly in this region—my observations indicate that beech trees can succumb to BLD within just two growing seasons. MANAGEMENT STRATEGIES What Treatment Protocols are currently being prescribed? Through my discussions with Cartier and Borden, it became clear that a de- cisive management approach is neces- sary. Cartier revealed that many com- panies perform both spring and fall foliar applications of a fluopyram-con- taining product. The only such product currently labeled for BLD is Broadform, which is a combination of fluopyram
noted that there appears to be a lack of natural predators that could regulate nematode damage. Rather, the U.S re- searchers have observed that in Japan, beech trees quickly shed leaves show- ing early stages of BLD, likely serving as a defense response to minimize damage and keep nematode popula- tions low.
THE COMPLEXITY OF BEECH LEAF DISEASE
While many fatal tree conditions stem from a complex web of problems, both Cartier and Borden emphasized that BLD is indeed a distinct issue. Beech trees have faced challenges like Beech Bark Disease, Phytophthora, and cul- tural problems including over-pruning
A trunk injection delivers systemic treatment directly into a tree’s vascular system. Injections are recommended between mid-June and mid-July for optimal uptake.
46 | Spring 2025 ArborTIMES ™
Made with FlippingBook - professional solution for displaying marketing and sales documents online