Certified Professional Horticulturist (CPH) Practice Exam

What is the most important maintenance step for avoiding disease and pest infestations?

1. Sanitation

2. Identification

3. Application of pesticides

4. Aeration of soil

The correct answer is: Sanitation

Sanitation plays a crucial role in preventing disease and pest infestations in both gardens and landscapes. This process involves removing debris, dead plant material, and any infected or infested plants, which are often breeding grounds for pests and pathogens. By regularly cleaning up garden areas and removing potential sources of disease, growers can significantly reduce the chances of issues arising in the future. Additionally, proper sanitation includes practices such as sterilizing tools, maintaining clean pots and containers, and avoiding the introduction of infested materials. This proactive approach is generally more effective and sustainable compared to reactive measures like pesticide application, as it tackles the problem at its source. Maintaining a clean environment creates a less hospitable habitat for pests and diseases, thereby supporting healthier plant growth. While the identification of pests and diseases is essential for managing plant health, it does not prevent them from occurring in the first place. Similarly, although aeration of soil is important for root health and overall plant vigor, it doesn't directly address the risk factors associated with diseases and pests. Therefore, sanitation stands out as the most critical maintenance step for avoiding infestations and ensuring a thriving, healthy plant ecosystem.