What is a key difference between flush cuts and proper cuts made to a branch collar?

Making a proper cut to a branch collar is essential in tree care, as it helps promote the tree's natural healing processes. When a flush cut is made, it removes the branch collar, which is the swollen area at the base of a branch that plays a crucial role in the tree's ability to compartmentalize decay and protect against pathogens. A flush cut not only disrupts this natural defense mechanism but also creates a larger wound than necessary, which can lead to increased vulnerability to decay and disease.

By contrast, when a proper cut is made, the branch collar is left intact. This helps to minimize the size of the wound and supports the tree's ability to seal off the cut area, reducing the risk of decay entering the trunk. The retention of the collar is essential for healthy wound closure, as it contains specialized tissues that assist in this process. Therefore, the creation of an opening for decay is a significant consequence of flush cuts, highlighting the importance of proper cutting techniques in arboriculture.