What is a common consequence of not treating small wounds from pruning?

The statement that if left untreated, trees can still thrive is misleading in the context of small wounds from pruning. In reality, small wounds can be entry points for pathogens and diseases, which can compromise the tree's health over time. While a tree might initially appear to thrive despite minor wounds, the lack of proper treatment can lead to long-term health issues, as it may struggle to properly heal and protect itself from infections.

In contrast, the idea of immediate disease growth suggests that untreated wounds can quickly become infected, which is more aligned with the biological reality of plants responding to injuries. Additionally, significant growth loss and decreased foliage are consequences that relate directly to untreated wounds affecting a tree's overall vigor, as compromised health can lead to reduced photosynthesis and energy production.