Ornamental and Turf Pesticide Applicators Practice Exam

What is a recommended practice to help prevent root rot?

1. Use high nitrogen fertilizers

2. Maintain poor drainage

3. Keep plants crowded together

4. Ensure good drainage

The correct answer is: Ensure good drainage

Ensuring good drainage is a key practice in preventing root rot. Root rot typically occurs when plant roots are waterlogged due to poor drainage, leading to a lack of oxygen and fostering conditions for pathogens to thrive. By maintaining good drainage, excess water can escape the root zone, allowing roots to access the oxygen they need for healthy growth. Good drainage can be achieved through various methods, such as using well-draining soil mixes, raising planting beds, or incorporating materials like sand or perlite to facilitate water movement. This practice not only helps keep the roots dry but also promotes a healthier root environment, which is essential for the overall vitality of the plant. In contrast, high nitrogen fertilizers can lead to excessive growth that may require more water, potentially increasing the risk of root rot if not balanced properly. Poor drainage and overcrowding in planting arrangements can further exacerbate the problem by preventing moisture from evaporating or draining, increasing humidity around plants, and creating an environment conducive to fungal diseases.