Texas Pesticide Applicator Practice Exam

What is the primary function of protectant fungicides?

1. To cure plant diseases

2. To prevent plant diseases

3. To enhance plant growth

4. To promote flowering

The correct answer is: To prevent plant diseases

The primary function of protectant fungicides is to prevent plant diseases. These types of fungicides work by forming a protective barrier on the plant surfaces, which inhibits the germination of fungal spores and prevents them from infecting the plant. By applying these fungicides proactively, they help maintain the health of the plants by stopping pathogens before they have a chance to establish and spread. In contrast, the other options focus on different functions that are not the main purpose of protectant fungicides. Curing plant diseases refers to therapeutic measures that are used after infection has occurred, which is not the role of protectant fungicides. Enhancing plant growth or promoting flowering are benefits that arise from healthy plant conditions but are not direct functions of fungicides. Protectant fungicides specifically target the prevention of disease rather than treating or enhancing growth, making preventive action their key role in integrated pest management.