| aphid specific predators in potato in belgium. | in summer 2003, aphid specific predators populations were sampled in four potato fields located in wallonia. ladybirds, hoverflies and lacewings were the most abundant predators collected. a total of 6 ladybird, 8 syrphid and 2 lacewing species was found. predator species composition and abundance greatly differed from field to field, while aphids populations were more or less similar with a peak of 3 to 5 aphid/potato leaf in mid-july. all chrysopidae sampled belong to the chrysoperla kolthoffi ... | 2004 | 15759406 |
| application of nested-pcr technique to resting spores from the entomophthora muscae species complex: implications for analyses of host-pathogen population interactions. | we developed new entomophthora-specific primers for nested-pcr of the its ii region to be used on in vivo material and combined it with rflp. resting spores from scathophaga stercoraria (3 specimens), delia radicum (9 specimens), botanophila fugax (1 specimen), and two syrphid host species, platycheirus peltatus and melanostoma mellinum (one specimen of each) were characterized genetically after analysis of rflp-profiles of the pcr-products. the genetic characterization of the resting spore isol ... | 2002 | 21156553 |
| when mtdna coi is misleading: congruent signal of its2 molecular marker and morphology for north european melanostoma schiner, 1860 (diptera, syrphidae). | the northern european taxa of genus melanostoma schiner, 1860 (syrphidae, diptera) are revised. a longstanding question concerning the number of melanostoma taxa occurring in northern europe prompted us to contrast and compare their morphological and molecular variability. particular uncertainty concerned the putative existence of a sibling species of melanostoma mellinum, and the identity of the taxon melanostoma dubium in northern europe due to existence of morphologically similar dark forms o ... | 2014 | 25152670 |