Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz (1999) 72, 72-75

P. Stary and P. Laska (1999)
Adaptation of native syrphid flies to new exotic plant (Impatiens spp.)-aphid-ant associations in Central Europe (Dipt., Syrphidae; Hom., Aphididae; Hym., Formicidae)
Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz 72 (3), 72-75
Abstract: Impatiens parviflora and I. glandulifera, two invasive touch-me-not species of exotic origin were found to be associated with two aphid groups in central Europe: a) Exotic species subsequently following their invasive plant hosts (Impatientinum asiaticum NEvsKY), b) native species secondarily adapted to the new exotic hosts (Aphis fabae cirsiiacanthoidis Scop.). The species number (listed) of associated syrphid flies in the newly developed guilds was rather high, consisting of broadly oligophagous species. The plant phenology and adaptation of the aphids have resulted in associations which apparently represent seasonally significant sources of prey, their importance apparently increasing with the decreasing season. Ant-attendance was determined in both aphid species, and no adverse interference with the preying syrphid larvae was observed. In spite of an overall classification of the target plants as expansive weeds, they are classified positively as contributing to the enhancement of syrphid fly populations in the biocorridors in the cultivated landscape.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Petr Stary

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.
	Impatiens glandulifera (weed)		Czech Republic
	Impatiens parviflora (weed)		Czech Republic
Impatientinum asiaticum (weed bioagent)	Impatiens glandulifera (weed)
Impatientinum asiaticum (weed bioagent)	Impatiens parviflora (weed)