Foliar pesticides are applied to plant parts and can be contact or systemic. Which option correctly describes this usage?

• A. Leaves, stems, and branches
• B. Roots only
• C. Seeds only
• D. Air-only

Answer: (A)

Foliar pesticides are applied to above-ground plant tissues, so they target parts like leaves and, when sprayed, can also cover stems and branches. They can work by contact, meaning the pesticide acts on the surface where it’s applied, or by being systemic, where the chemical is absorbed by the leaf and then moved through the plant to other tissues. That’s why leaves, stems, and branches is the correct description.

Roots-only applications are soil or root-drench treatments, seeds-only would be seed coatings or treatments, and air-only isn’t a realistic plant target, so those don’t describe foliar use.