What is the significance of using indicator plants in diagnosing viral infections?

Using indicator plants in diagnosing viral infections is significant because these plants typically exhibit symptoms of viral infection earlier than the main crop plants. This early manifestation allows for timely detection and management of viral diseases, which can be crucial for effective pest and disease control strategies. By observing the indicator plants, growers can identify the presence of viral pathogens before they spread extensively to their main crops, thereby facilitating proactive measures to protect the health and yield of the crops.

Resistance to all viruses, the ability to grow in nutrient-deficient soil, and increased overall crop yield are not characteristics associated with the function of indicator plants in this context. While they may offer other benefits or play different roles in agricultural systems, the primary value of indicator plants lies in their responsiveness to viral infections, making them a useful tool for early diagnosis in plant pathology.