If you have ever driven past an orchard in full winter sunlight or a suburban garden with meticulously pruned trees, you might have noticed trunks painted a brilliant white. At first glance, it may appear purely decorative or a whimsical landscaping choice. However, in arboriculture, this technique—known as trunk whitewashing—is far more than an aesthetic preference. It is a vital protective measure designed to safeguard trees from a dangerous physiological condition that can silently damage or even kill them. The principal threat this white paint combats is sunscald, a condition that occurs primarily during winter months. Trees, especially young or...
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