Ask A Professional

摘要

Question: Colleagues and I were discussing hack-and-squirt for control of beech, but weren't sure of the specifics for how to apply this treatment or other treatment options. What should we know? (Collin, Lower-Hudson Chapter)Answer: There are many circumstances and species of woody shrubs, subcanopy, and canopy trees for which treatment of individual stems might be the optimal strategy (Figure 1). These treatments might be mechanical or chemical, but because it is applied toa specific, individual stem the mode of treatment is known as "selective." The alternative is a "broadcast" treatment mode, where all stems within an area are treated. Broadcast treatments are the more efficient option if there are more than approximately 400 stems per acre or if the majority of the stems in an area are of undesired form or species. Broadcast treatments might be infeasible if there is a high proportion of desired stems, if stems are large (e.g., mature trees) or if treatment requires large but unavailable equipment.