Showing papers on "Uroleucon published in 2003"

A review of the West Palaearctic aphidiines (Hymenoptera: Braconidae: Aphidiinae) parasitic on Uroleucon spp., with the description of a new species

Abstract: A review of aphidiine wasps (Hymenoptera: Braconidae) parasitizing the Uroleucon species in the West Palaearctic is presented. Eleven species are keyed and illustrated. In addition, a new hymenopteran parasitoid species: Praon nonveilleri n. sp. from Uroleucon inulicola (Hille Ris Lambers) infesting Inula ensifolia L., is described. The new species is diagnosed and illustrated. It belongs to the “dorsale-yomenae” species group and was collected from the Djetinja canyon in Serbia and Montenegro. The aphidiines presented in this work were identified from 97 aphid taxons occurring on 236 plant taxons. Furthermore, 361 original parasitoid – host aphid – host plant associations of the species mentioned in the key are presented. Finally, phylogenetic relationships inside the “dorsale-yomenae” species group and related species were reconstructed using cladistic distance methods.

A new Praon species (Hymenoptera: Braconidae: Aphidiinae) of the Uroleucon parasitoid complex from the Mediterranean area.

Abstract: A new hymenopteran aphid parasitoid species (Praon uroleucon sp. n.) fromUroleucon sp. infestingCarduus acanthoides L. is described from Yugoslavia. It is diagnosed and illustrated with scanning electron microscope photographs and line drawings. The new species is placed in thePraon dorsale species group, and a key to species of that group is provided.

Pandora uroleuconii sp. nov. (Zygomycetes: Entomophthoraceae), a new pathogen of aphids.

Abstract: Pandora uroleuconii sp. nov. is described and illustrated. It possesses branched conidiophores, ellipsoid to ovoid monokaryotic and bitunicate primary conidia, pseudocystidia, and large nuclei staining distinctly with aceto-orcein. Rhizoids are absent. The pathogen differs from other species of the genus by absence of rhizoids, different size of primary conidia, growth on standard media and probably high host specialization. P. uroleuconii attacked aphid species Uroleucon aeneum during May and June in many localities in Slovakia. The species did not grow on standard media and did not exhibit infectivity to five common aphid species, Acyrthosiphon pisum, Diuraphis noxia, Metopolophium dirhodum, Myzus persicae and Rhopalosiphum padi. The new fungal species is compared and contrasted with similar species of the genus.