Which symptom might be evident in a tree trunk or limb girdled by rope, wire, or vine?

Which symptom might be evident in a tree trunk or limb girdled by rope, wire, or vine?

• A. Limb/trunk looks pinched to the point of girding, with swelling above the constriction point.
• B. Leaves develop blue color in summer.
• C. Roots die back at the soil line.
• D. Fruit development ceases entirely.

Answer: (A)

Girdling around a trunk or limb interrupts the flow of nutrients and signals in the vascular tissues, causing a distinctive visual response. When a rope, wire, or vine tightens around the stem, it damages the phloem around the circumference. The tree can still grow and push new tissue, so the area just above the constriction swells as cambial tissue expands against the tight belt. This creates a pinched appearance at the constriction with swelling above it, a classic sign that the girdling is intercepting the transport of carbohydrates downward and stressing the tree. Other signs listed don’t specifically reflect girdling. Blue leaves in summer point to nutrient imbalance or environmental stress, not a mechanical constriction. Roots dying back at the soil line indicates root-level problems, such as rot or drought, rather than a surface girdle. Complete cessation of fruit development can occur from various stresses but isn’t a hallmark of a girdle around the trunk or limb.

Girdling around a trunk or limb interrupts the flow of nutrients and signals in the vascular tissues, causing a distinctive visual response. When a rope, wire, or vine tightens around the stem, it damages the phloem around the circumference. The tree can still grow and push new tissue, so the area just above the constriction swells as cambial tissue expands against the tight belt. This creates a pinched appearance at the constriction with swelling above it, a classic sign that the girdling is intercepting the transport of carbohydrates downward and stressing the tree.

Other signs listed don’t specifically reflect girdling. Blue leaves in summer point to nutrient imbalance or environmental stress, not a mechanical constriction. Roots dying back at the soil line indicates root-level problems, such as rot or drought, rather than a surface girdle. Complete cessation of fruit development can occur from various stresses but isn’t a hallmark of a girdle around the trunk or limb.