How does tree vigor relate to pest susceptibility?

The relationship between tree vigor and pest susceptibility is an important concept in forest management and pest control. Healthy and vigorous trees possess strong defenses against pests and diseases. They typically have better physiological conditions, such as robust growth, optimal leaf development, and strong root systems, which contribute to their overall resilience.

When a tree is healthy, it can more effectively produce secondary metabolites and other biochemical compounds that deter pests and pathogens. Additionally, vigorous trees are better at recovering from pest attacks due to their enhanced nutrient uptake and overall vitality. This means that even if a pest does attack a healthy tree, the tree is more capable of withstanding the stress and minimizing damage.

The other options do not accurately reflect the established relationship between tree health and pest issues. For instance, stating that healthier trees are more susceptible contradicts the fundamental understanding of plant physiology, where health typically corresponds to resilience. Similarly, suggesting that only weakened trees are affected ignores the reality that pests can target a range of tree conditions but may have a greater impact on those that are compromised. The assertion that pest susceptibility is not linked to tree health overlooks the extensive research demonstrating that tree vigor plays a critical role in determining how trees respond to pest pressures.