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Common vetch · Vicia sativa

Why are there bugs on my common vetch?

Common vetch is a magnet for aphids, which love to cluster on the tender new growth. Check the undersides of your leaves and the stems for tiny green or black insects.

pests on a plant
Photo: Jules Verne Times Two, CC BY-SA 4.0

Check these first

  1. Inspect the stems and undersides of leaves for clusters of tiny insects.
  2. Check for sticky residue on the foliage.
  3. Look for ants, which often farm aphids.

Likely causes

  1. Aphid infestation

    Most likely

    How to tell: You will see clusters of small, soft bodied insects on stems and leaf undersides. They often leave behind a sticky residue called honeydew.

    What to do: Spray the plant with a steady stream of water to knock them off. If they persist, apply insecticidal soap every 5 to 7 days until they are gone.

  2. Weakened plant health

    Possible

    How to tell: Plants that are stressed from lack of sun or poor soil are more susceptible to pests. Look for stunted growth alongside the insects.

    What to do: Ensure your vetch is in a spot with full sun. Feed with a balanced liquid fertilizer diluted to half strength once every 4 weeks.

When to worry

A few aphids are normal, but if they cover the entire plant and cause wilting, you must act quickly. If the plant is already dying, it may be too late to save.

Stopping it coming back

Keep your vetch healthy with consistent water and full sun to make it less attractive to pests. Check your plants weekly for early signs of visitors.

Not sure which one it is? Photograph your common vetch.

This page lists the usual causes. Pocket Botanist looks at your actual leaf and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

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Questions people ask

Will aphids kill my vetch?
They can weaken it significantly by sucking out sap and spreading viruses. It is best to remove them as soon as you spot them.
Can I use neem oil?
Yes, neem oil is effective against aphids. Apply it in the evening to avoid burning the leaves in the sun.

More problems with Common vetch

Back to the Common vetch guide

This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.