What part of the plant is least likely to be attacked by aphids?

The roots of a plant are least likely to be attacked by aphids for several reasons. Aphids are primarily sap-sucking insects that tend to feed on the tender, succulent parts of a plant where the flow of sap is most abundant and where they can easily access it. They typically prefer leaves, stems, and new growth since these areas provide the necessary nutrients and moisture.

The roots, on the other hand, are generally below the soil surface and are not directly accessible to aphids, which are aerial insects. Their feeding behavior and habitat preferences mean that aphids are unlikely to infest the root system, focusing instead on the above-ground parts of the plant where they can thrive. This characteristic of aphids highlights the significance of monitoring these other parts of the plant for potential pest infestations.