Journal of Plant Protection Research (2013) 53, 353-356

Radoslav Andreev, Donka Rasheva and Hristina Kutinkova (2013)
Occurrence and population density of aphids in apple orchards of south Bulgaria
Journal of Plant Protection Research 53 (4), 353-356
Abstract: In a 2006-2008 study, seven aphid species (Hemiptera: Aphididae) were detected on apple trees in South Bulgaria: Rhopalosiphum insertum Walk. (apple-grass aphid), Dysaphis plantaginea Pass (rosy apple aphid), Dysaphis devecta Walker (rosy leaf-curling aphid), Macrosiphum euphorbiae Thomas (potato aphid), Aphis pomi De Geer (green apple aphid), Aphis spiraecola Patch. (spiraea aphid/green citrus aphid) and Eriosoma lanigerum Nausm. (wooly apple aphid). The dominant species were D. plantaginea, found in 97.8% of the surveyed orchards. Two green aphid species from the genus Aphis were both found in 96.4% of the orchards. The rosy apple aphid was a more important pest of bearing orchards, where infestation in spring always exceeded the economic injury level (1-2% of infested shoots). The green aphids were more important in young orchards and nurseries, where they developed during the entire vegetation period and infestation sometimes exceed 50-80% of shoots. A. pomi was still more widespread, but A. spiraecola was found throughout all of South Bulgaria. As pests of apple, the other species were less common, causing lower infestations and minor economic importance.
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Database assignments for author(s): Radoslav Andreev, Hristina Kutinkova

Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Macrosiphum euphorbiae	Apple (Malus)	Bulgaria
	Aphis pomi	Apple (Malus)	Bulgaria
	Rhopalosiphum insertum	Apple (Malus)	Bulgaria
	Aphis spiraecola	Apple (Malus)	Bulgaria
	Dysaphis plantaginea	Apple (Malus)	Bulgaria
	Eriosoma lanigerum	Apple (Malus)	Bulgaria
	Dysaphis devecta	Apple (Malus)	Bulgaria