Foliar pesticides are applied to:

• A. Roots
• B. Leaves, stems, and branches
• C. Soil
• D. Seeds

Answer: (B)

The main idea is that foliar pesticides are applied to the above-ground parts of the plant—the leaves, and they can also cover stems and branches. The term “foliar” refers to foliage, so the purpose is to contact pests or diseases that inhabit or feed on the leafy parts. This is different from treatments aimed at the soil, roots, or seeds, which target pests or pathogens in the soil or that start from the root system. In practice, a foliar spray is formulated to stay on leaf surfaces long enough to act, though it can be washed off by rain and often requires good coverage to be effective. So the correct area for foliar pesticides is leaves, stems, and branches.