Which of the following are methods used in integrated pest management (IPM) in horticulture?

• A. Monitoring/scouting
• B. Cultural controls
• C. Biological controls
• D. All of the above

Answer: (D)

Integrated pest management in horticulture relies on using several complementary tactics together to keep pest levels in check while reducing environmental impact. Monitoring or scouting is essential because it provides the real-time information about pest presence and population thresholds, guiding when and what kind of action is warranted. Cultural controls change the growing conditions to make them less favorable for pests, such as rotating crops, keeping fields clean of debris, spacing plants properly, and managing irrigation and sanitation—all of which help reduce pest establishment and spread. Biological controls bring in or encourage natural enemies, like beneficial insects or microbial agents, to naturally suppress pest populations without resorting to broad-spectrum pesticides. When these approaches are combined, they form a more effective and sustainable strategy than any single method alone. So, all of the listed methods are used in IPM.