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Showing papers on "Uroleucon published in 2010"


Journal ArticleDOI
29 Apr 2010-PLOS ONE
TL;DR: Obs observations of natural aphid colonies revealed that a collective twitching and kicking response (CTKR) was frequently evoked during oviposition attempts of the parasitoid wasp Aphidius colemani and during attacks of aphidophagous larvae, suggesting that visual signals in combination with twitching-related substrate vibrations may play an important role in synchronising defense among members of a colony.
Abstract: The prevalent way aphids accomplish colony defense against natural enemies is a mutualistic relationship with ants or the occurrence of a specialised soldier caste typcial for eusocial aphids, or even both. Despite a group-living life style of those aphid species lacking these defense lines, communal defense against natural predators has not yet been observed there. Individuals of Aphis nerii (Oleander aphid) and Uroleucon hypochoeridis, an aphid species feeding on Hypochoeris radicata (hairy cat's ear), show a behavioral response to visual stimulation in the form of spinning or twitching, which is often accompanied by coordinated kicks executed with hind legs. Interestingly, this behaviour is highly synchronized among members of a colony and repetitive visual stimulation caused strong habituation. Observations of natural aphid colonies revealed that a collective twitching and kicking response (CTKR) was frequently evoked during oviposition attempts of the parasitoid wasp Aphidius colemani and during attacks of aphidophagous larvae. CTKR effectively interrupted oviposition attempts of this parasitoid wasp and even repelled this parasitoid from colonies after evoking consecutive CTKRs. In contrast, solitary feeding A. nerii individuals were not able to successfully repel this parasitoid wasp. In addition, CTKR was also evoked through gentle substrate vibrations. Laser vibrometry of the substrate revealed twitching-associated vibrations that form a train of sharp acceleration peaks in the course of a CTKR. This suggests that visual signals in combination with twitching-related substrate vibrations may play an important role in synchronising defense among members of a colony. In both aphid species collective defense in encounters with different natural enemies was executed in a stereotypical way and was similar to CTKR evoked through visual stimulation. This cooperative defense behavior provides an example of a surprising sociality that can be found in some aphid species that are not expected to be social at all.

37 citations


Journal Article
TL;DR: Nine aphid species from the Ondokuz Mayis University Kurupelit campus in Samsun province, Turkey, were determined as new records for the Turkish fauna.
Abstract: Nine aphid species from the Ondokuz Mayis University Kurupelit campus in Samsun province, Turkey, were determined as new records for the Turkish fauna. These species were Aphis helianthi Monell in Riley & Monell, 1879; Macrosiphum impatientis (Williams, 1911); Macrosiphum mordvilkoi Miyazaki, 1968; Macrosiphum pallidum (Oestlunt, 1887); Uroleucon pseudoambrosiae (Olive, 1963); Cinara maghrebica Mimeur, 1934; Cinara wahluca Hottes, 1952; Stomaphis cupressi (Pintera, 1965); and Maculolachnus submacula (Walker, 1848).

14 citations



Journal ArticleDOI
07 Jun 2010
TL;DR: Uroleucon (L Chambersius) escalantii (Knowlton) (syn. nov.) is declared a junior synonym of Uroleu Con (Lambersius) erigeronense (Thomas) based on examination of slide mounted material from many hosts and localities, using data from host plant transfers, and DNA sequences.
Abstract: Uroleucon (Lambersius) escalantii (Knowlton) (syn. nov.) is declared a junior synonym of Uroleucon (Lambersius) erigeronense (Thomas) based on examination of slide mounted material from many hosts and localities, using data from host plant transfers, and DNA sequences. A diagnosis and new information on the host plant biology of the species are also provided.

5 citations



01 Jan 2010
TL;DR: For the first time, Therioaphis brachytricha, Theriosphon rhiemi, Aphis brohmeri and Aphis coffeata are recorded from Byelorussia.
Abstract: For the first time, Therioaphis brachytricha, Therioaphis rhiemi, Aphis brohmeri, Aphis coffeata, Aphis korshunovi, Aphis lambersi, Aphis leontodontis, Aphis pilosellae, Aphis rumicivora, Anuraphis catonii, Brachycaudus mordvilkoi, Brachycaudus populi, Aspidaphis adjuvans, Myzus langei, Myzus certus, Acyrthosiphon malvae potha, Acyrthosiphon boreale, Macrosiphum albifrons, Macrosiphoniella dimidiata, Nasonovia pilosellae, Pleotrichophorus deviatus, Titanosiphon artemisiae, Uroleucon hypochoeridis, Uroleucon pilosellae, Uroleucon pseudobscurum, Uroleucon aeneum, and Uroleucon simile are recorded from Byelorussia.

3 citations


26 Nov 2010
TL;DR: Plant-aphid-parasitoid interactions and parasitism rates were assessed in adjacent cultivated and non-cultivated habitats in an organic vegetable farm in a chaco serrano woodland, Cordoba Province, Central Argentina from February to September 2004.
Abstract: Natural vegetation areas near cultivated land play an important role in maintaining insect diversity as well as interactions between insect communities and plants. Plant-aphid-parasitoid interactions and parasitism rates were assessed from February to September 2004 in adjacent cultivated and non-cultivated habitats in an organic vegetable farm in a chaco serrano woodland, Cordoba Province, Central Argentina. Seven aphid species present upon a total of eight vegetable species were found in the cultivated habitat. Macrosiphum euphorbiae was present on all vegetable species. Four parasitoid species were recorded, of which Diaretiella rapae was the most common. It was related to three aphid species, and provided 21.32% of parasitism on Brevicoryne brassicae. In the non-cultivated habitat, 36 plant species hosted a total of 22 aphid species and five parasitoid species. The aphid Myzus persicae was present on 17 plant species of eight different families. Macrosiphoniella artemisiae (present only on Artemisia abrotanum) was the most abundant aphid species, with the associated Aphidius sp. being the most abundant parasitoid. The maximum rate of parasitism of Aphidius polygonaphis (10%), related to Uroleucon aeneus on Carduus sp., was recorded in this habitat. Wild plants Artemisia abrotanum, Brassica nigra, Bidens pilosa, Capsella bursa-pastoris, Carduus sp., Chaptalia sp. and Chenopodium sp. were found to be important reservoirs of parasitoids D. rapae, Aphidius sp., A. polygonaphis, Aphidius ervi and Lysiphlebus testaceipes, which are potential controllers of many pest aphid species.

2 citations


01 Jan 2010
TL;DR: In this article, the authors report several wild plant species as important reservoirs of parasitoids, which are potential controllers of many pest aphid species, including Myzus persicae, Macrosiphoniella artemisiae, and Diaretiella rapae.
Abstract: Plant-aphid-parasitoid interactions and parasitism rates were assessed in adjacent cultivated and noncultivated habitats in an organic vegetable farm in a chaco serrano woodland, Cordoba, Argentina Seven aphid species on eight vegetable species were found in the cultivated habitat Macrosiphum euphorbiae was present on all vegetable species Four parasitoid species were recorded, of which Diaretiella rapae was the most common It provided 2132% of parasitism on Brevicoryne brassicae In the non-cultivated habitat, 36 plant species hosted 22 aphid species and five parasitoid species The aphid Myzus persicae was present on 17 plant species of eight different families Macrosiphoniella artemisiae was the most abundant aphid species, with the associated Aphidius sp being the most abundant parasitoid Aphidius polygonaphis provided 10% of parasitism on Uroleucon aeneus We report several wild plant species as important reservoirs of parasitoids, which are potential controllers of many pest aphid species