Black bean louse
| Black bean louse | ||||||||||||
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Black bean lice ( Aphis fabae ) on the leaf of a great burdock ( Arctium lappa ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Aphis fabae | ||||||||||||
| Scopoli , 1763 |
The black bean ( Aphis fabae ) is a relatively common representative of the aphids from the family of the tube aphids (Aphididae).
features
The winged and winged nymphs are broadly oval, 1.7 mm to 2.7 mm long and matt black to dark green in color. The antennae and legs are light with a dark tip. The lice have two large siphons on their abdomen.
biology
The black bean louse changes host. Hibernation takes place in the egg stage on spindle tree ( Euonymus europaeus ) and the ordinary snowball ( Viburnum opulus ). The winged lice fly on the herbaceous summer hosts in April, infesting very different plant species, e.g. B. beans, potatoes, beets and also the balsam . Several generations living in colonies are formed there. In autumn the return migration to the winter hosts and the laying of the eggs takes place.
Main symptoms and control
Characteristic is the curling of the leaves and the curvature of the shoot tips. Black fungi can settle on the honeydew released by the lice . The species also carries numerous phytopathogenic viruses.
The lice can be fought with the help of insecticides or soapy water. An important, natural enemy of aphids is the ladybird and its larvae.
distribution
The black bean louse occurs in many areas of the northern hemisphere with temperate or warmer climates.
Image gallery
SEM anaglyph representation of Aphis fabae on the underside of the leaf, magnification 50 ×
SEM anaglyph representation of Aphis fabae on the underside of the leaf, magnification 100 ×
SEM anaglyph representation of Aphis fabae on the underside of the leaf, magnification 1000 ×
literature
- Horst Börner: Plant diseases and plant protection . 7th edition. UTB 518, Eugen Ulmer publishing house, Stuttgart.
Individual evidence
- ↑ BISZ - Advice and information for the southern German sugar beet cultivation> Plant protection> Leaf - diseases> Viral yellowing. (No longer available online.) In: bisz.suedzucker.de. Archived from the original on April 4, 2016 ; Retrieved April 4, 2016 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
Web links
- Landfotos.de - Photo gallery: Black bean louse in agriculture
- Video: Aphis fabae (Aphididae) - birth . Institute for Scientific Film (IWF) 1986, made available by the Technical Information Library (TIB), doi : 10.3203 / IWF / E-2934 .