What term describes a fungicide that penetrates the outer layers of a plant but does not circulate throughout the entire plant?

The term "local penetrant" accurately describes a type of fungicide that is capable of penetrating the outer layers of a plant yet does not move throughout the entire plant structure. Local penetrants work by entering the plant where they can effectively target pathogens located close to the surface or in the outer tissues. This localized action can help provide protection against fungal infections that may attack the plant's surface without being absorbed and transported to other areas within the plant.

In contrast, systemic fungicides are specifically designed to be absorbed and distributed throughout the entire plant, allowing for protection against pathogens that may not be directly on the surface. Contact fungicides work by remaining on the plant's exterior, preventing pathogens from establishing, but do not penetrate the outer tissue. Curative fungicides are utilized to treat existing infections rather than prevent them, and they may or may not possess penetrating abilities. Understanding these distinctions is crucial for effective plant disease management and the appropriate selection of fungicides for specific situations.