Recognizing foxglove aphid:
Middle-sized aphid (1.8 - 3 mm); round to oval shaped. Its colour varies from shiny yellow-green to dingy brown-green. Siphones are rather long and slim. Their proximal part is more broad and they have a dark coloured tip. The antennae are long (1.3 - 1.5 x their bodylength) with many dark bands. Legs are long as well with dark coloured knees and ankles. The cuada is short, green. Young stages have distinct bright green spots around the siphones. Winged morphs have a yellow-brown head and bands on their back, interrupted in the middle. This aphid species is rather mobile and sensitive for disturbance. In greenhouse conditions only a-sexual reproduction takes place. There is no host-plant change.
Foxglove aphid damage:
The aphid lives spread all over the plant in colonies, often on stems or young plant parts but also on lower plant level. They suck from the plant and cause leaf-curling and leaf-discoloration (yellow spots that may resemble symptoms of virus infestation). With heavy infestation shoots may be hampered in their growth. The aphids produce lots of honeydew that makes fruits dirty and sticky. Sooty mold fungus may start growing on the honeydew, hampering photosynthesis and cuasing cosmetic damage. Like potato aphid the fosglove aphid may transfer several viruses.
Lifecycle of foxglove aphid:
- in greenhouses no sexual reproduction
- development time 7 - 10 days
- lifetime 1 - 2 weeks
Host plants foxglove aphid:
- very polyphagous
- in greenhouses on vegetables such as sweet pepper, egg-plant, tomato, salad
- many ornamental crops such as rose, chrysanthemum, gerbera
Products against foxglove aphid:
Aphiscout, mix of aphid parasitoids: