Black bean aphid

Black bean aphids on the leaf of a burdock

The black bean aphid (Aphis fabae ) is a relatively common representative of the aphids from the family of the aphids ( Aphididae ).

Features

The winged and wingless Virgin are broadly oval, 1.7 mm to 2.7 mm long and the color of her satin black to dark green. The antennae and legs are pale with dark tip. On the back of her body lice carry two large siphons.

Biology

The black bean is partly economic. Hibernation takes place in the egg stage on the spindle tree ( Euonymus europaeus) and the ordinary (Viburnum opulus ). The winged aphids flying in April to the summer herbaceous hosts, with very different plant species are affected, such as beans, potatoes, turnips. There are several generations living in colonies are formed. In the autumn the return migration to the winter hosts and the storage of eggs.

Main symptoms and combat

Characteristic is the curling of the leaves and curvature of the shoot tips. On the output by the lice themselves honeydew sooty mold can colonize. In addition, the type transmits numerous phytopathogenic viruses.

The lice can be controlled with the help of pesticides, with which one treats the summer hosts.

Dissemination

The black bean comes in many communities in the northern hemisphere temperate or warmer climates.

Photo Gallery

SEM anaglyph representation of Aphis fabae on a leaf surface, magnification 50x

SEM anaglyph representation of Aphis fabae on a leaf surface, magnification 100x

SEM anaglyph representation of Aphis fabae on a leaf surface, magnification 1000x