On which parts of a plant do aphids commonly feed?

Aphids typically feed on the stems, terminals, and undersides of leaves of a plant. They possess specialized mouthparts that allow them to pierce plant tissues and extract sap, which is rich in nutrients. This feeding behavior is primarily concentrated in these areas because they are softer and more succulent, making them ideal for aphids to access the essential fluids they require for nourishment.

Feeding on the terminals of young plants allows aphids to tap into the growth of the plant, which is often more vigorous and nutrient-rich. Similarly, the undersides of leaves provide shelter from predators and a stable environment for the aphids, who can easily access the phloem tissue where the sap flows. This feeding can lead to various issues for the plant, such as stunted growth, distorted foliage, and the potential for the transmission of plant viruses.

In contrast, the other options include parts of the plant that are not typically targeted by aphids due to their structure or the quality of the tissue. Roots and flowers, fruits and bark, as well as petals and pollen do not provide the same readily accessible and nutrient-rich environments as stems and the undersides of leaves do, making them less favorable feeding sites for aphids.