What is a characteristic of a systemic fungicide?

• A. It protects only the surface of the plant
• B. It remains effective even after rain
• C. It penetrates the plant to provide internal protection
• D. It is only effective on roots

Answer: (C)

A systemic fungicide is characterized by its ability to be absorbed by the plant and then transported throughout its tissues, providing internal protection against fungal diseases. This internal movement allows the fungicide to protect not only the areas that have been directly treated but also parts of the plant that may be inaccessible or hidden from direct application.

This attribute is especially beneficial because it can offer a longer duration of effectiveness compared to contact fungicides that only protect the surface. This means that systemic fungicides can provide comprehensive protection against diseases that may attack various parts of the plant as they grow and develop.

The other options do not accurately describe systemic fungicides. The surface protection characteristic belongs to contact fungicides, which can be washed away by rain, whereas systemic fungicides often remain effective as they are integrated into the plant's system. They do offer rooting protection, but their effectiveness is much broader than just on roots alone.