🟢 Pea Aphids – Acyrthosiphon pisum

Pea aphids thrive on soft, nitrogen-rich leguminous plants. Their preferred feeder food is fresh pea plants (Pisum sativum), particularly young shoots, tendrils, and developing leaves where sap flow is highest. They also readily colonize broad beans (Vicia faba), alfalfa (Medicago sativa), and clover species.

For rearing:

• Use healthy, pesticide-free plants grown in moist but well-drained soil
• Maintain moderate humidity and good airflow to prevent mold
• Replace plants regularly as aphids weaken them quickly
• Keep plants in active growth (young stages are most suitable)

These aphids feed by inserting their stylets into phloem tissue, so vigorous, well-watered plants significantly improve colony productivity.

🔵 Vetch Aphids – Megoura viciae

Vetch aphids prefer slightly tougher but still nutrient-rich legumes, especially vetches (Vicia spp.), which are their primary host. They also perform well on broad beans (Vicia faba) and occasionally sweet peas (Lathyrus odoratus). Compared to pea aphids, they tolerate slightly more mature foliage.

For rearing:

• Provide established vetch or broad bean plants with multiple stems
• Ensure consistent watering to maintain sap flow
• Avoid overcrowding, as large colonies can stress host plants rapidly
• Rotate plants frequently to maintain colony health

Vetch aphids are larger and more robust than pea aphids, making them especially useful as feeder prey for larger predatory insects.

Key Differences (Feeder Context)

• Pea aphids: prefer tender, young growth → faster reproduction
• Vetch aphids: tolerate sturdier plants → produce larger individuals
• Both require living host plants—they cannot be sustained on artificial diets in typical feeder setups