| diversity of bacteria associated with natural aphid populations. | the bacterial communities of aphids were investigated by terminal restriction fragment length polymorphism and denaturing gradient gel electrophoresis analysis of 16s rrna gene fragments generated by pcr with general eubacterial primers. by both methods, the gamma-proteobacterium buchnera was detected in laboratory cultures of six parthenogenetic lines of the pea aphid acyrthosiphon pisum and one line of the black bean aphid aphis fabae, and one or more of four previously described bacterial tax ... | 2003 | 14660369 |
| issr, eric and rapd techniques to detect genetic diversity in the aphid pathogen pandora neoaphidis. | the entomopathogenic fungus pandora neoaphidis is an important natural enemy of aphids. issr, eric (enterobacterial repetitive intergenic consensus) and rapd pcr-based dna fingerprint analyses were undertaken to study intra-specific variation amongst 30 isolates of p. neoaphidis worldwide, together with six closely related species of entomophthorales. all methods yielded scorable binary characters, and distance matrices were constructed from both individual and combined data sets. neighbour-join ... | 2005 | 15912945 |
| dispersal of beauveria bassiana by the activity of nettle insects. | recent studies have shown that the entomopathogenic fungus beauveria bassiana occurs naturally on the phylloplanes of several plants, including nettles. insects could, by their activity, be contributing to this inoculum by dispersing it from other sites. the potential of nettle aphids microlophium carnosum and their predator anthocoris nemorum to disperse conidia of b. bassiana from soil to nettles and from sporulating cadavers in the nettle canopy was investigated in laboratory experiments. in ... | 2006 | 16843484 |
| transmission of pandora neoaphidis in the presence of co-occurring arthropods. | transmission of the entomopathogenic fungus pandora neoaphidis to the nettle aphid microlophium carnosum was assessed in the presence of arthropods that co-exist with the fungus within the habitat but do not compete for aphid hosts. the presence of a parasitoid significantly enhanced transmission, and transmission rates were similar for both enemy and non-enemy parasitoids. although herbivory of nettle leaves by peacock butterfly (inchis io) caterpillars indirectly reduced the number of m. carno ... | 2008 | 18343401 |
| re-visiting the aphidius urticae s. str. group: re-description of aphidius rubi starý and a. silvaticus starý (hymenoptera: braconidae: aphidiinae). | here we tested aphidius urticae s. str. host-associated lineages from microlophium carnosum (buckton), amphorophora rubi (kaltenbach), macrosiphum funestum (macchiati) and aulacorthum vaccinii hille ris lambers with the barcoding region of the mitochondrial cytochrome oxidase subunit i gene used to analyse population differences and elucidate phylogenetic relationships between the separated taxa. this molecular marker has been shown to be the most informative molecular marker in resolving specie ... | 2016 | 27811724 |
| food-chain transfer of zinc from contaminated urtica dioica and acer pseudoplatanus l. to the aphids microlophium carnosum and drepanosiphum platanoidis schrank. | this study examines the food-chain transfer of zn from two plant species, urtica dioica (stinging nettle) and acer pseudoplatanus (sycamore maple), into their corresponding aphid species, microlophium carnosum and drepanosiphum platanoidis. the plants were grown in a hydroponic system using solutions with increasing concentrations of zn from 0.02 to 41.9 mg zn/l. above-ground tissue concentrations in u. dioica and m. carnosum increased with increasing zn exposure (p < 0.001). zn concentrations i ... | 2010 | 19640624 |