What are the two main types of fungicides used for disease control on ornamentals?

The focus on contact and systemic fungicides is crucial for understanding their roles in disease management for ornamental plants. Contact fungicides work by remaining on the surface of the plant and providing a protective barrier against fungal pathogens. They are effective only where they have been applied and do not penetrate the plant tissue. This means they need to be applied in a way that ensures thorough coverage, particularly in areas where fungal diseases are likely to enter the plant.

On the other hand, systemic fungicides are absorbed by the plant and can move within its tissues. This means they can protect not only the outer surfaces but also internal tissues that may not be reachable by contact fungicides. Systemic fungicides can offer more extended protection and are particularly valuable for combating diseases that have already entered the plant or for preventing those that are likely to spread through the vascular system.

Understanding the difference between these two types of fungicides helps pest managers choose the appropriate treatment based on the specific fungal threat, the growth stage of the plants, and the overall management strategy for ornamental health.