What is the primary purpose of using indicator plants in pest management?

The primary purpose of using indicator plants in pest management is to detect the presence of specific pests. These plants serve as tools for monitoring pest activity, as certain pests may preferentially feed on or lay eggs on specific species of plants. When these plants show signs of infestation—such as damage, discoloration, or pest presence—pest managers can infer that pest populations are at levels that might impact other crops or plants nearby. Consequently, using indicator plants allows for early detection, facilitating timely intervention and reducing the potential for widespread damage.

While the other options touch on important aspects of gardening and plant health, they do not align with the primary role of indicator plants in the context of pest management. Nutrient deficiencies and pest detection are distinct issues, and while pollinator attraction is significant for ecosystem health, it does not directly relate to monitoring pest populations, which is the central focus of using indicator plants.