When an arborist prunes a limb off a valuable tree, he or she may paint the cut surface. The primary purpose of the paint is to ________.
A) minimise water loss by evaporation from the cut surface
B) improve the appearance of the cut surface
C) stimulate growth of the cork cambium to "heal" the wound
D) block entry of pathogens through the wound

Question

Quizplus · Accepted Answer

Painting the cut surface of a tree limb after pruning is primarily done to block entry of pathogens through the wound. It is believed that the paint creates a physical barrier that prevents the pathogens from entering the tree through the cut surface, thus reducing the risk of infection and disease. However, some studies suggest that painting the cut surface may do more harm than good, as it can trap moisture and promote decay.

When an Arborist Prunes a Limb Off a Valuable Tree