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    Bean aphid [Aphis fabae]

    The black bean aphid has alternate hosts. In early April the winged aphids fly to their summer hosts, infesting a wide range of different plant species, for example, beans, potatoes, beets. Egg deposition then takes place on the winter hosts.

    overview

    Bean aphid - image 1

    Bean aphid - image 1

    Pest Profile

    • About the pest

      Description

      The Aphids are approx. 1.5 mm to 3.0 mm in size, dull black to dark green. The legs are light with dark tips. Black bean aphids form dense colonies on growing tips and the underside of leaves (Picture 1).

      Symptoms & Diagnosis

      Pattern of damage

      Rolling of the leaves and distortion of the growing tips are typical. Sooty mold may then colonize the honeydew excreted by the aphids.

      Treatment

      Combat

      Insecticide treatment according to the current approval status

      Remarks

      Beneficial insects can help reduce aphid populations