What is a diagnostic tool used to identify pests in the field?

• A. Soil testing kits
• B. Field guides and identification keys
• C. Pest traps
• D. Computer software

Answer: (B)

Field guides and identification keys serve as essential diagnostic tools for identifying pests in the field. These resources provide detailed descriptions, images, and characteristics of various pests, which enable operators to recognize and classify them accurately. By following the systematic approaches provided in these guides, operators can compare observed specimens against the information presented and make informed decisions regarding pest control measures.

This method is crucial for effective pest management, as accurately identifying a pest is the first step in determining the appropriate control strategy. Field guides are often tailored to specific regions or types of crops, which enhances their relevance and reliability in real-world applications.