What is a characteristic of cankers on woody plants?

Cankers on woody plants are characterized by their variability in color and moisture levels. These lesions can manifest in a range of appearances, including dry, brown areas, as well as wet, dark, or even sunken patches. The precise nature of a canker is often influenced by several factors such as the type of pathogen involved, the stage of infection, and the specific environmental conditions. As a result, stating that cankers vary in both color and moisture reflects an accurate understanding of how these plant diseases can present themselves.

The variability is significant because it means that cankers cannot be easily categorized into a single appearance or condition, which is essential for proper diagnosis and management. Understanding this characteristic helps in recognizing cankers in the field and deciding on appropriate intervention measures to protect woody plants from further damage.