Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz (1999) 72, 126-128

Mourad L. Shonouda (1999)
Aphid aqueous-extract as a source of host searching kairomones for the aphidophagous predator Coccinella septempunctata L. (Col., Coccinellidae)
Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz 72 (5), 126-128
Abstract: Adult Coccinella septempunctata, a coccinellid predator of the bean aphid Aphis fabae Scop., responded to aqueous extract containing kairomones of the prey. The crude aphid-extract was topically dropped onto either clean leaves of Vicia faba or clean Petri-dishes. After application of aqueous-extract at different aphid densities, the predator showed variations in the attractivity and searching behaviour in comparison with control. The variations are summarized as follows: (1) the aqueous-extract of aphids attract or direct C. septempunctata adults to the treated vials at all aphid densities. The number of attracted or directed coccinellid adults was directly proportional with aphid concentrations; (2) the predator C. septempunctata adult intensified its searching behaviour by increasing the total path length walked; (3) the number of turns exhibited is significantly higher as compared with those of control; and (4) the arrested time spent by coccinellid adults with treated plant is much more than that with clean plant at all aphid densities. The present results show that the aphid aqueous-extract contains the active ingredients (kairomone) which induce considerable changes in the searching pattern of the predator coccinellid adults.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aphis fabae	Broad/faba bean (Vicia faba)
Coccinella septempunctata (predator)	Aphis fabae	Broad/faba bean (Vicia faba)