Which statement best defines a protectant fungicide?

Which statement best defines a protectant fungicide?

• A. Acts like an exterior shield that protects the plant from certain fungi or bacteria.
• B. Fungicides that are absorbed and move within the plant from the site of application to other tissues.
• C. Chemical that is absorbed into the immediate area of application but does not travel far from the uptake site.
• D. Once applied as a systemic, these chemicals control fungi that have already entered the plant.

Answer: (A)

Protectant fungicides act like an exterior shield on the surface of plant tissues. They sit on the leaf or fruit surface and form a barrier that prevents fungal spores from germinating or penetrating the plant. Because they stay on the outside, they don’t move through or into the plant, so their job is preventive rather than curative. They’re typically applied before infection and can be washed off by rain or new growth, requiring reapplication to maintain protection. This is different from systemic fungicides, which are absorbed and translocated inside the plant to protect internal tissues or to stop infections that have already started.

Protectant fungicides act like an exterior shield on the surface of plant tissues. They sit on the leaf or fruit surface and form a barrier that prevents fungal spores from germinating or penetrating the plant. Because they stay on the outside, they don’t move through or into the plant, so their job is preventive rather than curative. They’re typically applied before infection and can be washed off by rain or new growth, requiring reapplication to maintain protection. This is different from systemic fungicides, which are absorbed and translocated inside the plant to protect internal tissues or to stop infections that have already started.