Which wall of the CODIT is formed by new wood tissue?

The correct answer is Wall 4, which is formed by new wood tissue in the context of CODIT, or Compartmentalization of Decay in Trees. This concept, developed by Dr. Alex Shigo, explains how trees respond to wounds and decay through the formation of different walls that compartmentalize and isolate damaged areas.

Wall 4 represents the newest layers of wood that are formed in response to an injury, essentially sealing off affected areas to prevent the spread of decay. This newly generated tissue is critical for the tree's ability to compartmentalize damage and maintain the health of the remaining healthy wood. By creating this barrier with new wood tissue, trees can sustain their vitality and minimize the impact of pathogens and decay on their overall structure.

Understanding this process is vital for arborists, as it informs them about tree health and effective management strategies. The newly formed wood not only aids in healing but also plays a crucial role in the long-term longevity of the tree by maintaining its structural integrity.